diff mbox

[FFmpeg-devel,v3] lavfi: add new iteration API

Message ID 20180324213958.71486-1-josh@itanimul.li
State New
Headers show

Commit Message

Josh Dekker March 24, 2018, 9:39 p.m. UTC 
Signed-off-by: Josh de Kock <josh@itanimul.li>
---
 configure                |  29 +-
 doc/APIchanges           |   4 +
 doc/writing_filters.txt  |   6 +-
 libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
 libavfilter/avfilter.c   |  50 +--
 libavfilter/avfilter.h   |  29 +-
 libavfilter/version.h    |   3 +
 7 files changed, 489 insertions(+), 455 deletions(-)

Comments

Josh Allmann April 13, 2020, 9:32 p.m. UTC | #1 
Hi,

On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
>
> Signed-off-by: Josh de Kock <josh@itanimul.li>
> ---
>  configure                |  29 +-
>  doc/APIchanges           |   4 +
>  doc/writing_filters.txt  |   6 +-
>  libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
>  libavfilter/avfilter.c   |  50 +--
>  libavfilter/avfilter.h   |  29 +-
>  libavfilter/version.h    |   3 +
>  7 files changed, 489 insertions(+), 455 deletions(-)
>

This is a couple years too late, but wanted to drop a note that this
particular API change was breaking : it made avfilter_register a
no-op. The consequence is that it's much more difficult to maintain
filters out-of-tree; preserving the old behavior without changes to
user code requires a special build of ffmpeg that has the filter
configured/compiled in. The recommended workaround of using
avfilter_graph_alloc_filter requires more effort to wire the filter in
explicitly. It also doesn't allow for conveniences such as using
avfilter_graph_parse, since there doesn't seem to be a way to make
filters accessible via avfilter_get_by_name outside of ffmpeg compile
time.

If there is another workaround that I'm missing, please let me know,
or if there's some deeper rationale for the decision to disable this
feature.

Josh
Paul B Mahol April 14, 2020, 8:25 a.m. UTC | #2 
On 4/13/20, Josh Allmann <joshua.allmann@gmail.com> wrote:
> Hi,
>
> On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
>>
>> Signed-off-by: Josh de Kock <josh@itanimul.li>
>> ---
>>  configure                |  29 +-
>>  doc/APIchanges           |   4 +
>>  doc/writing_filters.txt  |   6 +-
>>  libavfilter/allfilters.c | 823
>> +++++++++++++++++++++++++----------------------
>>  libavfilter/avfilter.c   |  50 +--
>>  libavfilter/avfilter.h   |  29 +-
>>  libavfilter/version.h    |   3 +
>>  7 files changed, 489 insertions(+), 455 deletions(-)
>>
>
> This is a couple years too late, but wanted to drop a note that this
> particular API change was breaking : it made avfilter_register a
> no-op. The consequence is that it's much more difficult to maintain
> filters out-of-tree; preserving the old behavior without changes to
> user code requires a special build of ffmpeg that has the filter
> configured/compiled in. The recommended workaround of using
> avfilter_graph_alloc_filter requires more effort to wire the filter in
> explicitly. It also doesn't allow for conveniences such as using
> avfilter_graph_parse, since there doesn't seem to be a way to make
> filters accessible via avfilter_get_by_name outside of ffmpeg compile
> time.
>
> If there is another workaround that I'm missing, please let me know,
> or if there's some deeper rationale for the decision to disable this
> feature.

Out of tree filters are not supported.

>
> Josh
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
Josh Dekker April 14, 2020, 8:52 a.m. UTC | #3 
Hi,

On Mon, Apr 13, 2020, at 10:32 PM, Josh Allmann wrote:
> Hi,
> 
> On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
> >
> > Signed-off-by: Josh de Kock <josh@itanimul.li>
> > ---
> >  configure                |  29 +-
> >  doc/APIchanges           |   4 +
> >  doc/writing_filters.txt  |   6 +-
> >  libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
> >  libavfilter/avfilter.c   |  50 +--
> >  libavfilter/avfilter.h   |  29 +-
> >  libavfilter/version.h    |   3 +
> >  7 files changed, 489 insertions(+), 455 deletions(-)
> >
> 
> This is a couple years too late, but wanted to drop a note that this
> particular API change was breaking : it made avfilter_register a
> no-op. The consequence is that it's much more difficult to maintain
> filters out-of-tree; preserving the old behavior without changes to
> user code requires a special build of ffmpeg that has the filter
> configured/compiled in. The recommended workaround of using
> avfilter_graph_alloc_filter requires more effort to wire the filter in
> explicitly. It also doesn't allow for conveniences such as using
> avfilter_graph_parse, since there doesn't seem to be a way to make
> filters accessible via avfilter_get_by_name outside of ffmpeg compile
> time.
> 
> If there is another workaround that I'm missing, please let me know,
> or if there's some deeper rationale for the decision to disable this
> feature.

This was actually an intentional change, there was some trouble with how
external codecs/filters/etc should be handled.

Since this was an unsupported use-case which was quite sensitive to ABI the
change was there to explicitly prevent people (ab)using the API like this.  It
was also to prepare for potentially a new API to implement this in a proper
fashion (but as you can see this was never completed).

I did begin working on this again a little while back but due to an unfortunate
data-loss I will have to start from scratch to continue working on it (yes, yes
'where's your backup?' I know). It's likely to be something I will be working
on in the future since I will be doing FFmpeg stuff again soon.

There is also the discussion of 'do we want this?' from a more ideological
perspective which we will have to re-discuss, maybe something like gstreamer is
more suited for the majority of the use-cases (?).
Lynne April 14, 2020, 9:39 a.m. UTC | #4 
Apr 14, 2020, 09:52 by josh@itanimul.li:

> Hi,
>
> On Mon, Apr 13, 2020, at 10:32 PM, Josh Allmann wrote:
>
>> Hi,
>>
>> On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
>> >
>> > Signed-off-by: Josh de Kock <josh@itanimul.li>
>> > ---
>> >  configure                |  29 +-
>> >  doc/APIchanges           |   4 +
>> >  doc/writing_filters.txt  |   6 +-
>> >  libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
>> >  libavfilter/avfilter.c   |  50 +--
>> >  libavfilter/avfilter.h   |  29 +-
>> >  libavfilter/version.h    |   3 +
>> >  7 files changed, 489 insertions(+), 455 deletions(-)
>> >
>>
>> This is a couple years too late, but wanted to drop a note that this
>> particular API change was breaking : it made avfilter_register a
>> no-op. The consequence is that it's much more difficult to maintain
>> filters out-of-tree; preserving the old behavior without changes to
>> user code requires a special build of ffmpeg that has the filter
>> configured/compiled in. The recommended workaround of using
>> avfilter_graph_alloc_filter requires more effort to wire the filter in
>> explicitly. It also doesn't allow for conveniences such as using
>> avfilter_graph_parse, since there doesn't seem to be a way to make
>> filters accessible via avfilter_get_by_name outside of ffmpeg compile
>> time.
>>
>> If there is another workaround that I'm missing, please let me know,
>> or if there's some deeper rationale for the decision to disable this
>> feature.
>>
>
> This was actually an intentional change, there was some trouble with how
> external codecs/filters/etc should be handled.
>
> Since this was an unsupported use-case which was quite sensitive to ABI the
> change was there to explicitly prevent people (ab)using the API like this.  It
> was also to prepare for potentially a new API to implement this in a proper
> fashion (but as you can see this was never completed).
>
> I did begin working on this again a little while back but due to an unfortunate
> data-loss I will have to start from scratch to continue working on it (yes, yes
> 'where's your backup?' I know). It's likely to be something I will be working
> on in the future since I will be doing FFmpeg stuff again soon.
>
> There is also the discussion of 'do we want this?' from a more ideological
> perspective which we will have to re-discuss, maybe something like gstreamer is
> more suited for the majority of the use-cases (?).
>

Nope, we definitely don't want to do this. NAK. Have you seen the trashfire of random
outdated proprietary (and free) plugins for gstreamer?
Removing the option of abusing the API like that was also somewhat motivated by
preventing that scenario from happening, at the cost of making fuzzing take longer.
This was answered in the original discussion, there's no reason to bring this up now,
nothing has changed.
Josh Allmann April 15, 2020, 10 p.m. UTC | #5 
On Tue, 14 Apr 2020 at 01:53, Josh de Kock <josh@itanimul.li> wrote:
>
> Hi,
>
> On Mon, Apr 13, 2020, at 10:32 PM, Josh Allmann wrote:
> > Hi,
> >
> > On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
> > >
> > > Signed-off-by: Josh de Kock <josh@itanimul.li>
> > > ---
> > >  configure                |  29 +-
> > >  doc/APIchanges           |   4 +
> > >  doc/writing_filters.txt  |   6 +-
> > >  libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
> > >  libavfilter/avfilter.c   |  50 +--
> > >  libavfilter/avfilter.h   |  29 +-
> > >  libavfilter/version.h    |   3 +
> > >  7 files changed, 489 insertions(+), 455 deletions(-)
> > >
> >
> > This is a couple years too late, but wanted to drop a note that this
> > particular API change was breaking : it made avfilter_register a
> > no-op. The consequence is that it's much more difficult to maintain
> > filters out-of-tree; preserving the old behavior without changes to
> > user code requires a special build of ffmpeg that has the filter
> > configured/compiled in. The recommended workaround of using
> > avfilter_graph_alloc_filter requires more effort to wire the filter in
> > explicitly. It also doesn't allow for conveniences such as using
> > avfilter_graph_parse, since there doesn't seem to be a way to make
> > filters accessible via avfilter_get_by_name outside of ffmpeg compile
> > time.
> >
> > If there is another workaround that I'm missing, please let me know,
> > or if there's some deeper rationale for the decision to disable this
> > feature.
>
> This was actually an intentional change, there was some trouble with how
> external codecs/filters/etc should be handled.
>
> Since this was an unsupported use-case which was quite sensitive to ABI the
> change was there to explicitly prevent people (ab)using the API like this.  It
> was also to prepare for potentially a new API to implement this in a proper
> fashion (but as you can see this was never completed).
>
> I did begin working on this again a little while back but due to an unfortunate
> data-loss I will have to start from scratch to continue working on it (yes, yes
> 'where's your backup?' I know). It's likely to be something I will be working
> on in the future since I will be doing FFmpeg stuff again soon.
>
> There is also the discussion of 'do we want this?' from a more ideological
> perspective which we will have to re-discuss, maybe something like gstreamer is
> more suited for the majority of the use-cases (?).
>

Thanks for the explanation Josh. For what it's worth, count me as
being at least one API user for which out-of-tree filter capability
would be very helpful. (And to preempt some other reactions, "use
gstreamer" is not really helpful for us either...)

Josh
Paul B Mahol April 16, 2020, 8:44 a.m. UTC | #6 
On 4/16/20, Josh Allmann <joshua.allmann@gmail.com> wrote:
> On Tue, 14 Apr 2020 at 01:53, Josh de Kock <josh@itanimul.li> wrote:
>>
>> Hi,
>>
>> On Mon, Apr 13, 2020, at 10:32 PM, Josh Allmann wrote:
>> > Hi,
>> >
>> > On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
>> > >
>> > > Signed-off-by: Josh de Kock <josh@itanimul.li>
>> > > ---
>> > >  configure                |  29 +-
>> > >  doc/APIchanges           |   4 +
>> > >  doc/writing_filters.txt  |   6 +-
>> > >  libavfilter/allfilters.c | 823
>> > > +++++++++++++++++++++++++----------------------
>> > >  libavfilter/avfilter.c   |  50 +--
>> > >  libavfilter/avfilter.h   |  29 +-
>> > >  libavfilter/version.h    |   3 +
>> > >  7 files changed, 489 insertions(+), 455 deletions(-)
>> > >
>> >
>> > This is a couple years too late, but wanted to drop a note that this
>> > particular API change was breaking : it made avfilter_register a
>> > no-op. The consequence is that it's much more difficult to maintain
>> > filters out-of-tree; preserving the old behavior without changes to
>> > user code requires a special build of ffmpeg that has the filter
>> > configured/compiled in. The recommended workaround of using
>> > avfilter_graph_alloc_filter requires more effort to wire the filter in
>> > explicitly. It also doesn't allow for conveniences such as using
>> > avfilter_graph_parse, since there doesn't seem to be a way to make
>> > filters accessible via avfilter_get_by_name outside of ffmpeg compile
>> > time.
>> >
>> > If there is another workaround that I'm missing, please let me know,
>> > or if there's some deeper rationale for the decision to disable this
>> > feature.
>>
>> This was actually an intentional change, there was some trouble with how
>> external codecs/filters/etc should be handled.
>>
>> Since this was an unsupported use-case which was quite sensitive to ABI
>> the
>> change was there to explicitly prevent people (ab)using the API like this.
>>  It
>> was also to prepare for potentially a new API to implement this in a
>> proper
>> fashion (but as you can see this was never completed).
>>
>> I did begin working on this again a little while back but due to an
>> unfortunate
>> data-loss I will have to start from scratch to continue working on it
>> (yes, yes
>> 'where's your backup?' I know). It's likely to be something I will be
>> working
>> on in the future since I will be doing FFmpeg stuff again soon.
>>
>> There is also the discussion of 'do we want this?' from a more ideological
>> perspective which we will have to re-discuss, maybe something like
>> gstreamer is
>> more suited for the majority of the use-cases (?).
>>
>
> Thanks for the explanation Josh. For what it's worth, count me as
> being at least one API user for which out-of-tree filter capability
> would be very helpful. (And to preempt some other reactions, "use
> gstreamer" is not really helpful for us either...)
>

You must know that out of tree filters will never be supported.


> Josh
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
Jean-Baptiste Kempf April 16, 2020, 8:48 a.m. UTC | #7 
On Thu, Apr 16, 2020, at 10:44, Paul B Mahol wrote:
> > Thanks for the explanation Josh. For what it's worth, count me as
> > being at least one API user for which out-of-tree filter capability
> > would be very helpful. (And to preempt some other reactions, "use
> > gstreamer" is not really helpful for us either...)
> 
> You must know that out of tree filters will never be supported.

Why?
Michael Niedermayer April 16, 2020, 7:33 p.m. UTC | #8 
On Wed, Apr 15, 2020 at 03:00:32PM -0700, Josh Allmann wrote:
> On Tue, 14 Apr 2020 at 01:53, Josh de Kock <josh@itanimul.li> wrote:
> >
> > Hi,
> >
> > On Mon, Apr 13, 2020, at 10:32 PM, Josh Allmann wrote:
> > > Hi,
> > >
> > > On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
> > > >
> > > > Signed-off-by: Josh de Kock <josh@itanimul.li>
> > > > ---
> > > >  configure                |  29 +-
> > > >  doc/APIchanges           |   4 +
> > > >  doc/writing_filters.txt  |   6 +-
> > > >  libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
> > > >  libavfilter/avfilter.c   |  50 +--
> > > >  libavfilter/avfilter.h   |  29 +-
> > > >  libavfilter/version.h    |   3 +
> > > >  7 files changed, 489 insertions(+), 455 deletions(-)
> > > >
> > >
> > > This is a couple years too late, but wanted to drop a note that this
> > > particular API change was breaking : it made avfilter_register a
> > > no-op. The consequence is that it's much more difficult to maintain
> > > filters out-of-tree; preserving the old behavior without changes to
> > > user code requires a special build of ffmpeg that has the filter
> > > configured/compiled in. The recommended workaround of using
> > > avfilter_graph_alloc_filter requires more effort to wire the filter in
> > > explicitly. It also doesn't allow for conveniences such as using
> > > avfilter_graph_parse, since there doesn't seem to be a way to make
> > > filters accessible via avfilter_get_by_name outside of ffmpeg compile
> > > time.
> > >
> > > If there is another workaround that I'm missing, please let me know,
> > > or if there's some deeper rationale for the decision to disable this
> > > feature.
> >
> > This was actually an intentional change, there was some trouble with how
> > external codecs/filters/etc should be handled.
> >
> > Since this was an unsupported use-case which was quite sensitive to ABI the
> > change was there to explicitly prevent people (ab)using the API like this.  It
> > was also to prepare for potentially a new API to implement this in a proper
> > fashion (but as you can see this was never completed).
> >
> > I did begin working on this again a little while back but due to an unfortunate
> > data-loss I will have to start from scratch to continue working on it (yes, yes
> > 'where's your backup?' I know). It's likely to be something I will be working
> > on in the future since I will be doing FFmpeg stuff again soon.
> >
> > There is also the discussion of 'do we want this?' from a more ideological
> > perspective which we will have to re-discuss, maybe something like gstreamer is
> > more suited for the majority of the use-cases (?).
> >
> 
> Thanks for the explanation Josh. For what it's worth, count me as
> being at least one API user for which out-of-tree filter capability
> would be very helpful. (And to preempt some other reactions, "use
> gstreamer" is not really helpful for us either...)

I also would be in favor of some out of tree filter support.
Let me explain why
Some real ideas i was toying around:
Some video source to simulate N body gravitational interaction and
another idea was one to simulate the spread of an epidemic amongth
points moving around ...

Iam not sure these things would belong in-tree
And as things are, if anyone works on anything like such filters which
are not generic multimedia filters. They run the risk to get their work
rejected "doesnt belong in FFmpeg" and then that has no reasonable place
to go.
For me at least that risk has been a factor in moving some random ideas about
writing one or another filter down my todo and rather work on something else

With "out of tree filter" support one would know that filters which are 
outside the scope of multimedia would have a place to go.
I think its also in the spirit of open source ...

Thanks

[...]
Andreas Rheinhardt April 16, 2020, 7:52 p.m. UTC | #9 
Michael Niedermayer:
> On Wed, Apr 15, 2020 at 03:00:32PM -0700, Josh Allmann wrote:
>> On Tue, 14 Apr 2020 at 01:53, Josh de Kock <josh@itanimul.li> wrote:
>>>
>>> Hi,
>>>
>>> On Mon, Apr 13, 2020, at 10:32 PM, Josh Allmann wrote:
>>>> Hi,
>>>>
>>>> On Sat, 24 Mar 2018 at 14:40, Josh de Kock <josh@itanimul.li> wrote:
>>>>>
>>>>> Signed-off-by: Josh de Kock <josh@itanimul.li>
>>>>> ---
>>>>>  configure                |  29 +-
>>>>>  doc/APIchanges           |   4 +
>>>>>  doc/writing_filters.txt  |   6 +-
>>>>>  libavfilter/allfilters.c | 823 +++++++++++++++++++++++++----------------------
>>>>>  libavfilter/avfilter.c   |  50 +--
>>>>>  libavfilter/avfilter.h   |  29 +-
>>>>>  libavfilter/version.h    |   3 +
>>>>>  7 files changed, 489 insertions(+), 455 deletions(-)
>>>>>
>>>>
>>>> This is a couple years too late, but wanted to drop a note that this
>>>> particular API change was breaking : it made avfilter_register a
>>>> no-op. The consequence is that it's much more difficult to maintain
>>>> filters out-of-tree; preserving the old behavior without changes to
>>>> user code requires a special build of ffmpeg that has the filter
>>>> configured/compiled in. The recommended workaround of using
>>>> avfilter_graph_alloc_filter requires more effort to wire the filter in
>>>> explicitly. It also doesn't allow for conveniences such as using
>>>> avfilter_graph_parse, since there doesn't seem to be a way to make
>>>> filters accessible via avfilter_get_by_name outside of ffmpeg compile
>>>> time.
>>>>
>>>> If there is another workaround that I'm missing, please let me know,
>>>> or if there's some deeper rationale for the decision to disable this
>>>> feature.
>>>
>>> This was actually an intentional change, there was some trouble with how
>>> external codecs/filters/etc should be handled.
>>>
>>> Since this was an unsupported use-case which was quite sensitive to ABI the
>>> change was there to explicitly prevent people (ab)using the API like this.  It
>>> was also to prepare for potentially a new API to implement this in a proper
>>> fashion (but as you can see this was never completed).
>>>
>>> I did begin working on this again a little while back but due to an unfortunate
>>> data-loss I will have to start from scratch to continue working on it (yes, yes
>>> 'where's your backup?' I know). It's likely to be something I will be working
>>> on in the future since I will be doing FFmpeg stuff again soon.
>>>
>>> There is also the discussion of 'do we want this?' from a more ideological
>>> perspective which we will have to re-discuss, maybe something like gstreamer is
>>> more suited for the majority of the use-cases (?).
>>>
>>
>> Thanks for the explanation Josh. For what it's worth, count me as
>> being at least one API user for which out-of-tree filter capability
>> would be very helpful. (And to preempt some other reactions, "use
>> gstreamer" is not really helpful for us either...)
> 
> I also would be in favor of some out of tree filter support.
> Let me explain why
> Some real ideas i was toying around:
> Some video source to simulate N body gravitational interaction and
> another idea was one to simulate the spread of an epidemic amongth
> points moving around ...
> 
> Iam not sure these things would belong in-tree
> And as things are, if anyone works on anything like such filters which
> are not generic multimedia filters. They run the risk to get their work
> rejected "doesnt belong in FFmpeg" and then that has no reasonable place
> to go.
> For me at least that risk has been a factor in moving some random ideas about
> writing one or another filter down my todo and rather work on something else
> 
> With "out of tree filter" support one would know that filters which are 
> outside the scope of multimedia would have a place to go.
> I think its also in the spirit of open source ...
> 
How would one create these out-of-tree filters without using internal
API and without extending the public API for this (thereby hindering
development generally)? E.g. all those function pointers in AVFilter
(and lots of other similar structures) are internal API and would be
made public in some way to support this.

- Andreas
Nicolas George April 16, 2020, 7:56 p.m. UTC | #10 
Andreas Rheinhardt (12020-04-16):
> How would one create these out-of-tree filters without using internal
> API and without extending the public API for this (thereby hindering
> development generally)? E.g. all those function pointers in AVFilter
> (and lots of other similar structures) are internal API and would be
> made public in some way to support this.

The internal API is quite complex and moving because we want filters to
be able to do a lot of things very efficiently.

If we limit the features offered to out-of-tree filters and accept
suboptimal performance, it is reasonably easy to offer them a simple
API that would not hinder development.

Regards,
Jean-Baptiste Kempf April 17, 2020, 10:38 a.m. UTC | #11 
On Thu, Apr 16, 2020, at 21:56, Nicolas George wrote:
> Andreas Rheinhardt (12020-04-16):
> > How would one create these out-of-tree filters without using internal
> > API and without extending the public API for this (thereby hindering
> > development generally)? E.g. all those function pointers in AVFilter
> > (and lots of other similar structures) are internal API and would be
> > made public in some way to support this.
> 
> The internal API is quite complex and moving because we want filters to
> be able to do a lot of things very efficiently.
> 
> If we limit the features offered to out-of-tree filters and accept
> suboptimal performance, it is reasonably easy to offer them a simple
> API that would not hinder development.

Yeah, that was the idea we discussed already IRL.
At least simple picture in -> picture out, (and same for audio), should be nice to have.

--
Jean-Baptiste Kempf - President
+33 672 704 734
diff mbox

Patch

diff --git a/configure b/configure
index cc3edeb80f..c1efefb61e 100755
--- a/configure
+++ b/configure
@@ -3561,15 +3561,6 @@  for v in "$@"; do
     FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
 done
 
-find_things(){
-    thing=$1
-    pattern=$2
-    file=$source_path/$3
-    sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
-}
-
-FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
-
 find_things_extern(){
     thing=$1
     pattern=$2
@@ -3578,6 +3569,13 @@  find_things_extern(){
     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$out/p" "$file"
 }
 
+find_filters_extern(){
+    file=$source_path/$1
+    #sed -n "s/^extern AVFilter ff_\([avfsinkrc]\{2,5\}\)_\(\w\+\);/\2_filter/p" $file
+    sed -E -n "s/^extern AVFilter ff_([avfsinkrc]{2,5})_([a-zA-Z0-9_]+);/\2_filter/p" $file
+}
+
+FILTER_LIST=$(find_filters_extern libavfilter/allfilters.c)
 OUTDEV_LIST=$(find_things_extern muxer AVOutputFormat libavdevice/alldevices.c outdev)
 INDEV_LIST=$(find_things_extern demuxer AVInputFormat libavdevice/alldevices.c indev)
 MUXER_LIST=$(find_things_extern muxer AVOutputFormat libavformat/allformats.c)
@@ -7088,6 +7086,10 @@  echo "#endif /* AVUTIL_AVCONFIG_H */" >> $TMPH
 
 cp_if_changed $TMPH libavutil/avconfig.h
 
+full_filter_name(){
+    sed -n "s/^extern AVFilter ff_\([avfsinkrc]\{2,5\}\)_$1;/\1_$1/p" $source_path/libavfilter/allfilters.c
+}
+
 # generate the lists of enabled components
 print_enabled_components(){
     file=$1
@@ -7098,6 +7100,9 @@  print_enabled_components(){
     for c in $*; do
         if enabled $c; then
             case $name in
+                filter_list)
+                    c=$(full_filter_name $(remove_suffix _filter $c))
+                ;;
                 indev_list)
                     c=$(add_suffix _demuxer $(remove_suffix _indev $c))
                 ;;
@@ -7108,10 +7113,16 @@  print_enabled_components(){
             printf "    &ff_%s,\n" $c >> $TMPH
         fi
     done
+    if [ "$name" == "filter_list" ]; then
+        for c in asrc_abuffer vsrc_buffer asink_abuffer vsink_buffer; do
+            printf "    &ff_%s,\n" $c >> $TMPH
+        done
+    fi
     echo "    NULL };" >> $TMPH
     cp_if_changed $TMPH $file
 }
 
+print_enabled_components libavfilter/filter_list.c AVFilter filter_list $FILTER_LIST
 print_enabled_components libavcodec/codec_list.c AVCodec codec_list $CODEC_LIST
 print_enabled_components libavcodec/parser_list.c AVCodecParser parser_list $PARSER_LIST
 print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter bitstream_filters $BSF_LIST
diff --git a/doc/APIchanges b/doc/APIchanges
index d410bcdd75..4052988f59 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,10 @@  libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2018-xx-xx - xxxxxxx - lavc 7.13.100 - avcodec.h
+  Deprecate use of avfilter_register(), avfilter_register_all(),
+  avfilter_next(). Add av_filter_iterate().
+
 2018-03-21 - xxxxxxx - lavc 58.15.100 - avcodec.h
   Add av_packet_make_writable().
 
diff --git a/doc/writing_filters.txt b/doc/writing_filters.txt
index 5cd4ecd6a4..98b9c6f3d2 100644
--- a/doc/writing_filters.txt
+++ b/doc/writing_filters.txt
@@ -31,10 +31,8 @@  If everything went right, you should get a foobar.png with Lena edge-detected.
 That's it, your new playground is ready.
 
 Some little details about what's going on:
-libavfilter/allfilters.c:avfilter_register_all() is called at runtime to create
-a list of the available filters, but it's important to know that this file is
-also parsed by the configure script, which in turn will define variables for
-the build system and the C:
+libavfilter/allfilters.c:this file is parsed by the configure script, which in turn
+will define variables for the build system and the C:
 
     --- after running configure ---
 
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 3f67e321bf..b6a193a8f0 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -23,410 +23,455 @@ 
 #include "avfilter.h"
 #include "config.h"
 
+extern AVFilter ff_af_abench;
+extern AVFilter ff_af_acompressor;
+extern AVFilter ff_af_acontrast;
+extern AVFilter ff_af_acopy;
+extern AVFilter ff_af_acrossfade;
+extern AVFilter ff_af_acrusher;
+extern AVFilter ff_af_adelay;
+extern AVFilter ff_af_aecho;
+extern AVFilter ff_af_aemphasis;
+extern AVFilter ff_af_aeval;
+extern AVFilter ff_af_afade;
+extern AVFilter ff_af_afftfilt;
+extern AVFilter ff_af_afir;
+extern AVFilter ff_af_aformat;
+extern AVFilter ff_af_agate;
+extern AVFilter ff_af_aiir;
+extern AVFilter ff_af_ainterleave;
+extern AVFilter ff_af_alimiter;
+extern AVFilter ff_af_allpass;
+extern AVFilter ff_af_aloop;
+extern AVFilter ff_af_amerge;
+extern AVFilter ff_af_ametadata;
+extern AVFilter ff_af_amix;
+extern AVFilter ff_af_anequalizer;
+extern AVFilter ff_af_anull;
+extern AVFilter ff_af_apad;
+extern AVFilter ff_af_aperms;
+extern AVFilter ff_af_aphaser;
+extern AVFilter ff_af_apulsator;
+extern AVFilter ff_af_arealtime;
+extern AVFilter ff_af_aresample;
+extern AVFilter ff_af_areverse;
+extern AVFilter ff_af_aselect;
+extern AVFilter ff_af_asendcmd;
+extern AVFilter ff_af_asetnsamples;
+extern AVFilter ff_af_asetpts;
+extern AVFilter ff_af_asetrate;
+extern AVFilter ff_af_asettb;
+extern AVFilter ff_af_ashowinfo;
+extern AVFilter ff_af_asidedata;
+extern AVFilter ff_af_asplit;
+extern AVFilter ff_af_astats;
+extern AVFilter ff_af_astreamselect;
+extern AVFilter ff_af_atempo;
+extern AVFilter ff_af_atrim;
+extern AVFilter ff_af_azmq;
+extern AVFilter ff_af_bandpass;
+extern AVFilter ff_af_bandreject;
+extern AVFilter ff_af_bass;
+extern AVFilter ff_af_biquad;
+extern AVFilter ff_af_bs2b;
+extern AVFilter ff_af_channelmap;
+extern AVFilter ff_af_channelsplit;
+extern AVFilter ff_af_chorus;
+extern AVFilter ff_af_compand;
+extern AVFilter ff_af_compensationdelay;
+extern AVFilter ff_af_crossfeed;
+extern AVFilter ff_af_crystalizer;
+extern AVFilter ff_af_dcshift;
+extern AVFilter ff_af_drmeter;
+extern AVFilter ff_af_dynaudnorm;
+extern AVFilter ff_af_earwax;
+extern AVFilter ff_af_ebur128;
+extern AVFilter ff_af_equalizer;
+extern AVFilter ff_af_extrastereo;
+extern AVFilter ff_af_firequalizer;
+extern AVFilter ff_af_flanger;
+extern AVFilter ff_af_haas;
+extern AVFilter ff_af_hdcd;
+extern AVFilter ff_af_headphone;
+extern AVFilter ff_af_highpass;
+extern AVFilter ff_af_join;
+extern AVFilter ff_af_ladspa;
+extern AVFilter ff_af_loudnorm;
+extern AVFilter ff_af_lowpass;
+extern AVFilter ff_af_lv2;
+extern AVFilter ff_af_mcompand;
+extern AVFilter ff_af_pan;
+extern AVFilter ff_af_replaygain;
+extern AVFilter ff_af_resample;
+extern AVFilter ff_af_rubberband;
+extern AVFilter ff_af_sidechaincompress;
+extern AVFilter ff_af_sidechaingate;
+extern AVFilter ff_af_silencedetect;
+extern AVFilter ff_af_silenceremove;
+extern AVFilter ff_af_sofalizer;
+extern AVFilter ff_af_stereotools;
+extern AVFilter ff_af_stereowiden;
+extern AVFilter ff_af_superequalizer;
+extern AVFilter ff_af_surround;
+extern AVFilter ff_af_treble;
+extern AVFilter ff_af_tremolo;
+extern AVFilter ff_af_vibrato;
+extern AVFilter ff_af_volume;
+extern AVFilter ff_af_volumedetect;
 
-#define REGISTER_FILTER(X, x, y)                                        \
-    {                                                                   \
-        extern AVFilter ff_##y##_##x;                                   \
-        if (CONFIG_##X##_FILTER)                                        \
-            avfilter_register(&ff_##y##_##x);                           \
-    }
+extern AVFilter ff_asrc_aevalsrc;
+extern AVFilter ff_asrc_anoisesrc;
+extern AVFilter ff_asrc_anullsrc;
+extern AVFilter ff_asrc_flite;
+extern AVFilter ff_asrc_hilbert;
+extern AVFilter ff_asrc_sine;
 
-#define REGISTER_FILTER_UNCONDITIONAL(x)                                \
-    {                                                                   \
-        extern AVFilter ff_##x;                                         \
-        avfilter_register(&ff_##x);                                     \
-    }
+extern AVFilter ff_asink_anullsink;
+
+extern AVFilter ff_vf_alphaextract;
+extern AVFilter ff_vf_alphamerge;
+extern AVFilter ff_vf_ass;
+extern AVFilter ff_vf_atadenoise;
+extern AVFilter ff_vf_avgblur;
+extern AVFilter ff_vf_avgblur_opencl;
+extern AVFilter ff_vf_bbox;
+extern AVFilter ff_vf_bench;
+extern AVFilter ff_vf_bitplanenoise;
+extern AVFilter ff_vf_blackdetect;
+extern AVFilter ff_vf_blackframe;
+extern AVFilter ff_vf_blend;
+extern AVFilter ff_vf_boxblur;
+extern AVFilter ff_vf_bwdif;
+extern AVFilter ff_vf_chromakey;
+extern AVFilter ff_vf_ciescope;
+extern AVFilter ff_vf_codecview;
+extern AVFilter ff_vf_colorbalance;
+extern AVFilter ff_vf_colorchannelmixer;
+extern AVFilter ff_vf_colorkey;
+extern AVFilter ff_vf_colorlevels;
+extern AVFilter ff_vf_colormatrix;
+extern AVFilter ff_vf_colorspace;
+extern AVFilter ff_vf_convolution;
+extern AVFilter ff_vf_convolve;
+extern AVFilter ff_vf_copy;
+extern AVFilter ff_vf_coreimage;
+extern AVFilter ff_vf_cover_rect;
+extern AVFilter ff_vf_crop;
+extern AVFilter ff_vf_cropdetect;
+extern AVFilter ff_vf_curves;
+extern AVFilter ff_vf_datascope;
+extern AVFilter ff_vf_dctdnoiz;
+extern AVFilter ff_vf_deband;
+extern AVFilter ff_vf_decimate;
+extern AVFilter ff_vf_deconvolve;
+extern AVFilter ff_vf_deflate;
+extern AVFilter ff_vf_deflicker;
+extern AVFilter ff_vf_deinterlace_qsv;
+extern AVFilter ff_vf_deinterlace_vaapi;
+extern AVFilter ff_vf_dejudder;
+extern AVFilter ff_vf_delogo;
+extern AVFilter ff_vf_denoise_vaapi;
+extern AVFilter ff_vf_deshake;
+extern AVFilter ff_vf_despill;
+extern AVFilter ff_vf_detelecine;
+extern AVFilter ff_vf_dilation;
+extern AVFilter ff_vf_displace;
+extern AVFilter ff_vf_doubleweave;
+extern AVFilter ff_vf_drawbox;
+extern AVFilter ff_vf_drawgraph;
+extern AVFilter ff_vf_drawgrid;
+extern AVFilter ff_vf_drawtext;
+extern AVFilter ff_vf_edgedetect;
+extern AVFilter ff_vf_elbg;
+extern AVFilter ff_vf_entropy;
+extern AVFilter ff_vf_eq;
+extern AVFilter ff_vf_erosion;
+extern AVFilter ff_vf_extractplanes;
+extern AVFilter ff_vf_fade;
+extern AVFilter ff_vf_fftfilt;
+extern AVFilter ff_vf_field;
+extern AVFilter ff_vf_fieldhint;
+extern AVFilter ff_vf_fieldmatch;
+extern AVFilter ff_vf_fieldorder;
+extern AVFilter ff_vf_fillborders;
+extern AVFilter ff_vf_find_rect;
+extern AVFilter ff_vf_floodfill;
+extern AVFilter ff_vf_format;
+extern AVFilter ff_vf_fps;
+extern AVFilter ff_vf_framepack;
+extern AVFilter ff_vf_framerate;
+extern AVFilter ff_vf_framestep;
+extern AVFilter ff_vf_frei0r;
+extern AVFilter ff_vf_fspp;
+extern AVFilter ff_vf_gblur;
+extern AVFilter ff_vf_geq;
+extern AVFilter ff_vf_gradfun;
+extern AVFilter ff_vf_haldclut;
+extern AVFilter ff_vf_hflip;
+extern AVFilter ff_vf_histeq;
+extern AVFilter ff_vf_histogram;
+extern AVFilter ff_vf_hqdn3d;
+extern AVFilter ff_vf_hqx;
+extern AVFilter ff_vf_hstack;
+extern AVFilter ff_vf_hue;
+extern AVFilter ff_vf_hwdownload;
+extern AVFilter ff_vf_hwmap;
+extern AVFilter ff_vf_hwupload;
+extern AVFilter ff_vf_hwupload_cuda;
+extern AVFilter ff_vf_hysteresis;
+extern AVFilter ff_vf_idet;
+extern AVFilter ff_vf_il;
+extern AVFilter ff_vf_inflate;
+extern AVFilter ff_vf_interlace;
+extern AVFilter ff_vf_interleave;
+extern AVFilter ff_vf_kerndeint;
+extern AVFilter ff_vf_lenscorrection;
+extern AVFilter ff_vf_libvmaf;
+extern AVFilter ff_vf_limiter;
+extern AVFilter ff_vf_loop;
+extern AVFilter ff_vf_lumakey;
+extern AVFilter ff_vf_lut;
+extern AVFilter ff_vf_lut2;
+extern AVFilter ff_vf_lut3d;
+extern AVFilter ff_vf_lutrgb;
+extern AVFilter ff_vf_lutyuv;
+extern AVFilter ff_vf_maskedclamp;
+extern AVFilter ff_vf_maskedmerge;
+extern AVFilter ff_vf_mcdeint;
+extern AVFilter ff_vf_mergeplanes;
+extern AVFilter ff_vf_mestimate;
+extern AVFilter ff_vf_metadata;
+extern AVFilter ff_vf_midequalizer;
+extern AVFilter ff_vf_minterpolate;
+extern AVFilter ff_vf_mix;
+extern AVFilter ff_vf_mpdecimate;
+extern AVFilter ff_vf_negate;
+extern AVFilter ff_vf_nlmeans;
+extern AVFilter ff_vf_nnedi;
+extern AVFilter ff_vf_noformat;
+extern AVFilter ff_vf_noise;
+extern AVFilter ff_vf_normalize;
+extern AVFilter ff_vf_null;
+extern AVFilter ff_vf_ocr;
+extern AVFilter ff_vf_ocv;
+extern AVFilter ff_vf_oscilloscope;
+extern AVFilter ff_vf_overlay;
+extern AVFilter ff_vf_overlay_opencl;
+extern AVFilter ff_vf_overlay_qsv;
+extern AVFilter ff_vf_owdenoise;
+extern AVFilter ff_vf_pad;
+extern AVFilter ff_vf_palettegen;
+extern AVFilter ff_vf_paletteuse;
+extern AVFilter ff_vf_perms;
+extern AVFilter ff_vf_perspective;
+extern AVFilter ff_vf_phase;
+extern AVFilter ff_vf_pixdesctest;
+extern AVFilter ff_vf_pixscope;
+extern AVFilter ff_vf_pp;
+extern AVFilter ff_vf_pp7;
+extern AVFilter ff_vf_premultiply;
+extern AVFilter ff_vf_prewitt;
+extern AVFilter ff_vf_procamp_vaapi;
+extern AVFilter ff_vf_program_opencl;
+extern AVFilter ff_vf_pseudocolor;
+extern AVFilter ff_vf_psnr;
+extern AVFilter ff_vf_pullup;
+extern AVFilter ff_vf_qp;
+extern AVFilter ff_vf_random;
+extern AVFilter ff_vf_readeia608;
+extern AVFilter ff_vf_readvitc;
+extern AVFilter ff_vf_realtime;
+extern AVFilter ff_vf_remap;
+extern AVFilter ff_vf_removegrain;
+extern AVFilter ff_vf_removelogo;
+extern AVFilter ff_vf_repeatfields;
+extern AVFilter ff_vf_reverse;
+extern AVFilter ff_vf_roberts;
+extern AVFilter ff_vf_rotate;
+extern AVFilter ff_vf_sab;
+extern AVFilter ff_vf_scale;
+extern AVFilter ff_vf_scale_cuda;
+extern AVFilter ff_vf_scale_npp;
+extern AVFilter ff_vf_scale_qsv;
+extern AVFilter ff_vf_scale_vaapi;
+extern AVFilter ff_vf_scale2ref;
+extern AVFilter ff_vf_select;
+extern AVFilter ff_vf_selectivecolor;
+extern AVFilter ff_vf_sendcmd;
+extern AVFilter ff_vf_separatefields;
+extern AVFilter ff_vf_setdar;
+extern AVFilter ff_vf_setfield;
+extern AVFilter ff_vf_setpts;
+extern AVFilter ff_vf_setrange;
+extern AVFilter ff_vf_setsar;
+extern AVFilter ff_vf_settb;
+extern AVFilter ff_vf_sharpness_vaapi;
+extern AVFilter ff_vf_showinfo;
+extern AVFilter ff_vf_showpalette;
+extern AVFilter ff_vf_shuffleframes;
+extern AVFilter ff_vf_shuffleplanes;
+extern AVFilter ff_vf_sidedata;
+extern AVFilter ff_vf_signalstats;
+extern AVFilter ff_vf_signature;
+extern AVFilter ff_vf_smartblur;
+extern AVFilter ff_vf_sobel;
+extern AVFilter ff_vf_split;
+extern AVFilter ff_vf_spp;
+extern AVFilter ff_vf_ssim;
+extern AVFilter ff_vf_stereo3d;
+extern AVFilter ff_vf_streamselect;
+extern AVFilter ff_vf_subtitles;
+extern AVFilter ff_vf_super2xsai;
+extern AVFilter ff_vf_swaprect;
+extern AVFilter ff_vf_swapuv;
+extern AVFilter ff_vf_tblend;
+extern AVFilter ff_vf_telecine;
+extern AVFilter ff_vf_threshold;
+extern AVFilter ff_vf_thumbnail;
+extern AVFilter ff_vf_thumbnail_cuda;
+extern AVFilter ff_vf_tile;
+extern AVFilter ff_vf_tinterlace;
+extern AVFilter ff_vf_tlut2;
+extern AVFilter ff_vf_tonemap;
+extern AVFilter ff_vf_transpose;
+extern AVFilter ff_vf_trim;
+extern AVFilter ff_vf_unpremultiply;
+extern AVFilter ff_vf_unsharp;
+extern AVFilter ff_vf_unsharp_opencl;
+extern AVFilter ff_vf_uspp;
+extern AVFilter ff_vf_vaguedenoiser;
+extern AVFilter ff_vf_vectorscope;
+extern AVFilter ff_vf_vflip;
+extern AVFilter ff_vf_vidstabdetect;
+extern AVFilter ff_vf_vidstabtransform;
+extern AVFilter ff_vf_vignette;
+extern AVFilter ff_vf_vmafmotion;
+extern AVFilter ff_vf_vpp_qsv;
+extern AVFilter ff_vf_vstack;
+extern AVFilter ff_vf_w3fdif;
+extern AVFilter ff_vf_waveform;
+extern AVFilter ff_vf_weave;
+extern AVFilter ff_vf_xbr;
+extern AVFilter ff_vf_yadif;
+extern AVFilter ff_vf_zmq;
+extern AVFilter ff_vf_zoompan;
+extern AVFilter ff_vf_zscale;
+
+extern AVFilter ff_vsrc_allrgb;
+extern AVFilter ff_vsrc_allyuv;
+extern AVFilter ff_vsrc_cellauto;
+extern AVFilter ff_vsrc_color;
+extern AVFilter ff_vsrc_coreimagesrc;
+extern AVFilter ff_vsrc_frei0r_src;
+extern AVFilter ff_vsrc_haldclutsrc;
+extern AVFilter ff_vsrc_life;
+extern AVFilter ff_vsrc_mandelbrot;
+extern AVFilter ff_vsrc_mptestsrc;
+extern AVFilter ff_vsrc_nullsrc;
+extern AVFilter ff_vsrc_openclsrc;
+extern AVFilter ff_vsrc_rgbtestsrc;
+extern AVFilter ff_vsrc_smptebars;
+extern AVFilter ff_vsrc_smptehdbars;
+extern AVFilter ff_vsrc_testsrc;
+extern AVFilter ff_vsrc_testsrc2;
+extern AVFilter ff_vsrc_yuvtestsrc;
+
+extern AVFilter ff_vsink_nullsink;
+
+/* multimedia filters */
+extern AVFilter ff_avf_abitscope;
+extern AVFilter ff_avf_adrawgraph;
+extern AVFilter ff_avf_ahistogram;
+extern AVFilter ff_avf_aphasemeter;
+extern AVFilter ff_avf_avectorscope;
+extern AVFilter ff_avf_concat;
+extern AVFilter ff_avf_showcqt;
+extern AVFilter ff_avf_showfreqs;
+extern AVFilter ff_avf_showspectrum;
+extern AVFilter ff_avf_showspectrumpic;
+extern AVFilter ff_avf_showvolume;
+extern AVFilter ff_avf_showwaves;
+extern AVFilter ff_avf_showwavespic;
+extern AVFilter ff_vaf_spectrumsynth;
 
-static void register_all(void)
+/* multimedia sources */
+extern AVFilter ff_avsrc_amovie;
+extern AVFilter ff_avsrc_movie;
+
+/* those filters are part of public or internal API,
+ * they are formatted to not be found by the grep
+ * as they are manually added again (due to their 'names'
+ * being the same while having different 'types'). */
+extern  AVFilter ff_asrc_abuffer;
+extern  AVFilter ff_vsrc_buffer;
+extern  AVFilter ff_asink_abuffer;
+extern  AVFilter ff_vsink_buffer;
+extern AVFilter ff_af_afifo;
+extern AVFilter ff_vf_fifo;
+
+#include "libavfilter/filter_list.c"
+
+
+const AVFilter *av_filter_iterate(void **opaque)
 {
-    REGISTER_FILTER(ABENCH,         abench,         af);
-    REGISTER_FILTER(ACOMPRESSOR,    acompressor,    af);
-    REGISTER_FILTER(ACONTRAST,      acontrast,      af);
-    REGISTER_FILTER(ACOPY,          acopy,          af);
-    REGISTER_FILTER(ACROSSFADE,     acrossfade,     af);
-    REGISTER_FILTER(ACRUSHER,       acrusher,       af);
-    REGISTER_FILTER(ADELAY,         adelay,         af);
-    REGISTER_FILTER(AECHO,          aecho,          af);
-    REGISTER_FILTER(AEMPHASIS,      aemphasis,      af);
-    REGISTER_FILTER(AEVAL,          aeval,          af);
-    REGISTER_FILTER(AFADE,          afade,          af);
-    REGISTER_FILTER(AFFTFILT,       afftfilt,       af);
-    REGISTER_FILTER(AFIR,           afir,           af);
-    REGISTER_FILTER(AFORMAT,        aformat,        af);
-    REGISTER_FILTER(AGATE,          agate,          af);
-    REGISTER_FILTER(AIIR,           aiir,           af);
-    REGISTER_FILTER(AINTERLEAVE,    ainterleave,    af);
-    REGISTER_FILTER(ALIMITER,       alimiter,       af);
-    REGISTER_FILTER(ALLPASS,        allpass,        af);
-    REGISTER_FILTER(ALOOP,          aloop,          af);
-    REGISTER_FILTER(AMERGE,         amerge,         af);
-    REGISTER_FILTER(AMETADATA,      ametadata,      af);
-    REGISTER_FILTER(AMIX,           amix,           af);
-    REGISTER_FILTER(ANEQUALIZER,    anequalizer,    af);
-    REGISTER_FILTER(ANULL,          anull,          af);
-    REGISTER_FILTER(APAD,           apad,           af);
-    REGISTER_FILTER(APERMS,         aperms,         af);
-    REGISTER_FILTER(APHASER,        aphaser,        af);
-    REGISTER_FILTER(APULSATOR,      apulsator,      af);
-    REGISTER_FILTER(AREALTIME,      arealtime,      af);
-    REGISTER_FILTER(ARESAMPLE,      aresample,      af);
-    REGISTER_FILTER(AREVERSE,       areverse,       af);
-    REGISTER_FILTER(ASELECT,        aselect,        af);
-    REGISTER_FILTER(ASENDCMD,       asendcmd,       af);
-    REGISTER_FILTER(ASETNSAMPLES,   asetnsamples,   af);
-    REGISTER_FILTER(ASETPTS,        asetpts,        af);
-    REGISTER_FILTER(ASETRATE,       asetrate,       af);
-    REGISTER_FILTER(ASETTB,         asettb,         af);
-    REGISTER_FILTER(ASHOWINFO,      ashowinfo,      af);
-    REGISTER_FILTER(ASIDEDATA,      asidedata,      af);
-    REGISTER_FILTER(ASPLIT,         asplit,         af);
-    REGISTER_FILTER(ASTATS,         astats,         af);
-    REGISTER_FILTER(ASTREAMSELECT,  astreamselect,  af);
-    REGISTER_FILTER(ATEMPO,         atempo,         af);
-    REGISTER_FILTER(ATRIM,          atrim,          af);
-    REGISTER_FILTER(AZMQ,           azmq,           af);
-    REGISTER_FILTER(BANDPASS,       bandpass,       af);
-    REGISTER_FILTER(BANDREJECT,     bandreject,     af);
-    REGISTER_FILTER(BASS,           bass,           af);
-    REGISTER_FILTER(BIQUAD,         biquad,         af);
-    REGISTER_FILTER(BS2B,           bs2b,           af);
-    REGISTER_FILTER(CHANNELMAP,     channelmap,     af);
-    REGISTER_FILTER(CHANNELSPLIT,   channelsplit,   af);
-    REGISTER_FILTER(CHORUS,         chorus,         af);
-    REGISTER_FILTER(COMPAND,        compand,        af);
-    REGISTER_FILTER(COMPENSATIONDELAY, compensationdelay, af);
-    REGISTER_FILTER(CROSSFEED,      crossfeed,      af);
-    REGISTER_FILTER(CRYSTALIZER,    crystalizer,    af);
-    REGISTER_FILTER(DCSHIFT,        dcshift,        af);
-    REGISTER_FILTER(DRMETER,        drmeter,        af);
-    REGISTER_FILTER(DYNAUDNORM,     dynaudnorm,     af);
-    REGISTER_FILTER(EARWAX,         earwax,         af);
-    REGISTER_FILTER(EBUR128,        ebur128,        af);
-    REGISTER_FILTER(EQUALIZER,      equalizer,      af);
-    REGISTER_FILTER(EXTRASTEREO,    extrastereo,    af);
-    REGISTER_FILTER(FIREQUALIZER,   firequalizer,   af);
-    REGISTER_FILTER(FLANGER,        flanger,        af);
-    REGISTER_FILTER(HAAS,           haas,           af);
-    REGISTER_FILTER(HDCD,           hdcd,           af);
-    REGISTER_FILTER(HEADPHONE,      headphone,      af);
-    REGISTER_FILTER(HIGHPASS,       highpass,       af);
-    REGISTER_FILTER(JOIN,           join,           af);
-    REGISTER_FILTER(LADSPA,         ladspa,         af);
-    REGISTER_FILTER(LOUDNORM,       loudnorm,       af);
-    REGISTER_FILTER(LOWPASS,        lowpass,        af);
-    REGISTER_FILTER(LV2,            lv2,            af);
-    REGISTER_FILTER(MCOMPAND,       mcompand,       af);
-    REGISTER_FILTER(PAN,            pan,            af);
-    REGISTER_FILTER(REPLAYGAIN,     replaygain,     af);
-    REGISTER_FILTER(RESAMPLE,       resample,       af);
-    REGISTER_FILTER(RUBBERBAND,     rubberband,     af);
-    REGISTER_FILTER(SIDECHAINCOMPRESS, sidechaincompress, af);
-    REGISTER_FILTER(SIDECHAINGATE,  sidechaingate,  af);
-    REGISTER_FILTER(SILENCEDETECT,  silencedetect,  af);
-    REGISTER_FILTER(SILENCEREMOVE,  silenceremove,  af);
-    REGISTER_FILTER(SOFALIZER,      sofalizer,      af);
-    REGISTER_FILTER(STEREOTOOLS,    stereotools,    af);
-    REGISTER_FILTER(STEREOWIDEN,    stereowiden,    af);
-    REGISTER_FILTER(SUPEREQUALIZER, superequalizer, af);
-    REGISTER_FILTER(SURROUND,       surround,       af);
-    REGISTER_FILTER(TREBLE,         treble,         af);
-    REGISTER_FILTER(TREMOLO,        tremolo,        af);
-    REGISTER_FILTER(VIBRATO,        vibrato,        af);
-    REGISTER_FILTER(VOLUME,         volume,         af);
-    REGISTER_FILTER(VOLUMEDETECT,   volumedetect,   af);
+    uintptr_t i = (uintptr_t)*opaque;
+    const AVFilter *f = filter_list[i];
+
+    if (f)
+        *opaque = (void*)(i + 1);
 
-    REGISTER_FILTER(AEVALSRC,       aevalsrc,       asrc);
-    REGISTER_FILTER(ANOISESRC,      anoisesrc,      asrc);
-    REGISTER_FILTER(ANULLSRC,       anullsrc,       asrc);
-    REGISTER_FILTER(FLITE,          flite,          asrc);
-    REGISTER_FILTER(HILBERT,        hilbert,        asrc);
-    REGISTER_FILTER(SINE,           sine,           asrc);
+    return f;
+}
 
-    REGISTER_FILTER(ANULLSINK,      anullsink,      asink);
+const AVFilter *avfilter_get_by_name(const char *name)
+{
+    const AVFilter *f = NULL;
+    void *opaque = 0;
 
-    REGISTER_FILTER(ALPHAEXTRACT,   alphaextract,   vf);
-    REGISTER_FILTER(ALPHAMERGE,     alphamerge,     vf);
-    REGISTER_FILTER(ASS,            ass,            vf);
-    REGISTER_FILTER(ATADENOISE,     atadenoise,     vf);
-    REGISTER_FILTER(AVGBLUR,        avgblur,        vf);
-    REGISTER_FILTER(AVGBLUR_OPENCL, avgblur_opencl, vf);
-    REGISTER_FILTER(BBOX,           bbox,           vf);
-    REGISTER_FILTER(BENCH,          bench,          vf);
-    REGISTER_FILTER(BITPLANENOISE,  bitplanenoise,  vf);
-    REGISTER_FILTER(BLACKDETECT,    blackdetect,    vf);
-    REGISTER_FILTER(BLACKFRAME,     blackframe,     vf);
-    REGISTER_FILTER(BLEND,          blend,          vf);
-    REGISTER_FILTER(BOXBLUR,        boxblur,        vf);
-    REGISTER_FILTER(BWDIF,          bwdif,          vf);
-    REGISTER_FILTER(CHROMAKEY,      chromakey,      vf);
-    REGISTER_FILTER(CIESCOPE,       ciescope,       vf);
-    REGISTER_FILTER(CODECVIEW,      codecview,      vf);
-    REGISTER_FILTER(COLORBALANCE,   colorbalance,   vf);
-    REGISTER_FILTER(COLORCHANNELMIXER, colorchannelmixer, vf);
-    REGISTER_FILTER(COLORKEY,       colorkey,       vf);
-    REGISTER_FILTER(COLORLEVELS,    colorlevels,    vf);
-    REGISTER_FILTER(COLORMATRIX,    colormatrix,    vf);
-    REGISTER_FILTER(COLORSPACE,     colorspace,     vf);
-    REGISTER_FILTER(CONVOLUTION,    convolution,    vf);
-    REGISTER_FILTER(CONVOLVE,       convolve,       vf);
-    REGISTER_FILTER(COPY,           copy,           vf);
-    REGISTER_FILTER(COREIMAGE,      coreimage,      vf);
-    REGISTER_FILTER(COVER_RECT,     cover_rect,     vf);
-    REGISTER_FILTER(CROP,           crop,           vf);
-    REGISTER_FILTER(CROPDETECT,     cropdetect,     vf);
-    REGISTER_FILTER(CURVES,         curves,         vf);
-    REGISTER_FILTER(DATASCOPE,      datascope,      vf);
-    REGISTER_FILTER(DCTDNOIZ,       dctdnoiz,       vf);
-    REGISTER_FILTER(DEBAND,         deband,         vf);
-    REGISTER_FILTER(DECIMATE,       decimate,       vf);
-    REGISTER_FILTER(DECONVOLVE,     deconvolve,     vf);
-    REGISTER_FILTER(DEFLATE,        deflate,        vf);
-    REGISTER_FILTER(DEFLICKER,      deflicker,      vf);
-    REGISTER_FILTER(DEINTERLACE_QSV,deinterlace_qsv,vf);
-    REGISTER_FILTER(DEINTERLACE_VAAPI, deinterlace_vaapi, vf);
-    REGISTER_FILTER(DEJUDDER,       dejudder,       vf);
-    REGISTER_FILTER(DELOGO,         delogo,         vf);
-    REGISTER_FILTER(DENOISE_VAAPI,  denoise_vaapi,  vf);
-    REGISTER_FILTER(DESHAKE,        deshake,        vf);
-    REGISTER_FILTER(DESPILL,        despill,        vf);
-    REGISTER_FILTER(DETELECINE,     detelecine,     vf);
-    REGISTER_FILTER(DILATION,       dilation,       vf);
-    REGISTER_FILTER(DISPLACE,       displace,       vf);
-    REGISTER_FILTER(DOUBLEWEAVE,    doubleweave,    vf);
-    REGISTER_FILTER(DRAWBOX,        drawbox,        vf);
-    REGISTER_FILTER(DRAWGRAPH,      drawgraph,      vf);
-    REGISTER_FILTER(DRAWGRID,       drawgrid,       vf);
-    REGISTER_FILTER(DRAWTEXT,       drawtext,       vf);
-    REGISTER_FILTER(EDGEDETECT,     edgedetect,     vf);
-    REGISTER_FILTER(ELBG,           elbg,           vf);
-    REGISTER_FILTER(ENTROPY,        entropy,        vf);
-    REGISTER_FILTER(EQ,             eq,             vf);
-    REGISTER_FILTER(EROSION,        erosion,        vf);
-    REGISTER_FILTER(EXTRACTPLANES,  extractplanes,  vf);
-    REGISTER_FILTER(FADE,           fade,           vf);
-    REGISTER_FILTER(FFTFILT,        fftfilt,        vf);
-    REGISTER_FILTER(FIELD,          field,          vf);
-    REGISTER_FILTER(FIELDHINT,      fieldhint,      vf);
-    REGISTER_FILTER(FIELDMATCH,     fieldmatch,     vf);
-    REGISTER_FILTER(FIELDORDER,     fieldorder,     vf);
-    REGISTER_FILTER(FILLBORDERS,    fillborders,    vf);
-    REGISTER_FILTER(FIND_RECT,      find_rect,      vf);
-    REGISTER_FILTER(FLOODFILL,      floodfill,      vf);
-    REGISTER_FILTER(FORMAT,         format,         vf);
-    REGISTER_FILTER(FPS,            fps,            vf);
-    REGISTER_FILTER(FRAMEPACK,      framepack,      vf);
-    REGISTER_FILTER(FRAMERATE,      framerate,      vf);
-    REGISTER_FILTER(FRAMESTEP,      framestep,      vf);
-    REGISTER_FILTER(FREI0R,         frei0r,         vf);
-    REGISTER_FILTER(FSPP,           fspp,           vf);
-    REGISTER_FILTER(GBLUR,          gblur,          vf);
-    REGISTER_FILTER(GEQ,            geq,            vf);
-    REGISTER_FILTER(GRADFUN,        gradfun,        vf);
-    REGISTER_FILTER(HALDCLUT,       haldclut,       vf);
-    REGISTER_FILTER(HFLIP,          hflip,          vf);
-    REGISTER_FILTER(HISTEQ,         histeq,         vf);
-    REGISTER_FILTER(HISTOGRAM,      histogram,      vf);
-    REGISTER_FILTER(HQDN3D,         hqdn3d,         vf);
-    REGISTER_FILTER(HQX,            hqx,            vf);
-    REGISTER_FILTER(HSTACK,         hstack,         vf);
-    REGISTER_FILTER(HUE,            hue,            vf);
-    REGISTER_FILTER(HWDOWNLOAD,     hwdownload,     vf);
-    REGISTER_FILTER(HWMAP,          hwmap,          vf);
-    REGISTER_FILTER(HWUPLOAD,       hwupload,       vf);
-    REGISTER_FILTER(HWUPLOAD_CUDA,  hwupload_cuda,  vf);
-    REGISTER_FILTER(HYSTERESIS,     hysteresis,     vf);
-    REGISTER_FILTER(IDET,           idet,           vf);
-    REGISTER_FILTER(IL,             il,             vf);
-    REGISTER_FILTER(INFLATE,        inflate,        vf);
-    REGISTER_FILTER(INTERLACE,      interlace,      vf);
-    REGISTER_FILTER(INTERLEAVE,     interleave,     vf);
-    REGISTER_FILTER(KERNDEINT,      kerndeint,      vf);
-    REGISTER_FILTER(LENSCORRECTION, lenscorrection, vf);
-    REGISTER_FILTER(LIBVMAF,        libvmaf,        vf);
-    REGISTER_FILTER(LIMITER,        limiter,        vf);
-    REGISTER_FILTER(LOOP,           loop,           vf);
-    REGISTER_FILTER(LUMAKEY,        lumakey,        vf);
-    REGISTER_FILTER(LUT,            lut,            vf);
-    REGISTER_FILTER(LUT2,           lut2,           vf);
-    REGISTER_FILTER(LUT3D,          lut3d,          vf);
-    REGISTER_FILTER(LUTRGB,         lutrgb,         vf);
-    REGISTER_FILTER(LUTYUV,         lutyuv,         vf);
-    REGISTER_FILTER(MASKEDCLAMP,    maskedclamp,    vf);
-    REGISTER_FILTER(MASKEDMERGE,    maskedmerge,    vf);
-    REGISTER_FILTER(MCDEINT,        mcdeint,        vf);
-    REGISTER_FILTER(MERGEPLANES,    mergeplanes,    vf);
-    REGISTER_FILTER(MESTIMATE,      mestimate,      vf);
-    REGISTER_FILTER(METADATA,       metadata,       vf);
-    REGISTER_FILTER(MIDEQUALIZER,   midequalizer,   vf);
-    REGISTER_FILTER(MINTERPOLATE,   minterpolate,   vf);
-    REGISTER_FILTER(MIX,            mix,            vf);
-    REGISTER_FILTER(MPDECIMATE,     mpdecimate,     vf);
-    REGISTER_FILTER(NEGATE,         negate,         vf);
-    REGISTER_FILTER(NLMEANS,        nlmeans,        vf);
-    REGISTER_FILTER(NNEDI,          nnedi,          vf);
-    REGISTER_FILTER(NOFORMAT,       noformat,       vf);
-    REGISTER_FILTER(NOISE,          noise,          vf);
-    REGISTER_FILTER(NORMALIZE,      normalize,      vf);
-    REGISTER_FILTER(NULL,           null,           vf);
-    REGISTER_FILTER(OCR,            ocr,            vf);
-    REGISTER_FILTER(OCV,            ocv,            vf);
-    REGISTER_FILTER(OSCILLOSCOPE,   oscilloscope,   vf);
-    REGISTER_FILTER(OVERLAY,        overlay,        vf);
-    REGISTER_FILTER(OVERLAY_OPENCL, overlay_opencl, vf);
-    REGISTER_FILTER(OVERLAY_QSV,    overlay_qsv,    vf);
-    REGISTER_FILTER(OWDENOISE,      owdenoise,      vf);
-    REGISTER_FILTER(PAD,            pad,            vf);
-    REGISTER_FILTER(PALETTEGEN,     palettegen,     vf);
-    REGISTER_FILTER(PALETTEUSE,     paletteuse,     vf);
-    REGISTER_FILTER(PERMS,          perms,          vf);
-    REGISTER_FILTER(PERSPECTIVE,    perspective,    vf);
-    REGISTER_FILTER(PHASE,          phase,          vf);
-    REGISTER_FILTER(PIXDESCTEST,    pixdesctest,    vf);
-    REGISTER_FILTER(PIXSCOPE,       pixscope,       vf);
-    REGISTER_FILTER(PP,             pp,             vf);
-    REGISTER_FILTER(PP7,            pp7,            vf);
-    REGISTER_FILTER(PREMULTIPLY,    premultiply,    vf);
-    REGISTER_FILTER(PREWITT,        prewitt,        vf);
-    REGISTER_FILTER(PROCAMP_VAAPI,  procamp_vaapi,  vf);
-    REGISTER_FILTER(PROGRAM_OPENCL, program_opencl, vf);
-    REGISTER_FILTER(PSEUDOCOLOR,    pseudocolor,    vf);
-    REGISTER_FILTER(PSNR,           psnr,           vf);
-    REGISTER_FILTER(PULLUP,         pullup,         vf);
-    REGISTER_FILTER(QP,             qp,             vf);
-    REGISTER_FILTER(RANDOM,         random,         vf);
-    REGISTER_FILTER(READEIA608,     readeia608,     vf);
-    REGISTER_FILTER(READVITC,       readvitc,       vf);
-    REGISTER_FILTER(REALTIME,       realtime,       vf);
-    REGISTER_FILTER(REMAP,          remap,          vf);
-    REGISTER_FILTER(REMOVEGRAIN,    removegrain,    vf);
-    REGISTER_FILTER(REMOVELOGO,     removelogo,     vf);
-    REGISTER_FILTER(REPEATFIELDS,   repeatfields,   vf);
-    REGISTER_FILTER(REVERSE,        reverse,        vf);
-    REGISTER_FILTER(ROBERTS,        roberts,        vf);
-    REGISTER_FILTER(ROTATE,         rotate,         vf);
-    REGISTER_FILTER(SAB,            sab,            vf);
-    REGISTER_FILTER(SCALE,          scale,          vf);
-    REGISTER_FILTER(SCALE_CUDA,     scale_cuda,     vf);
-    REGISTER_FILTER(SCALE_NPP,      scale_npp,      vf);
-    REGISTER_FILTER(SCALE_QSV,      scale_qsv,      vf);
-    REGISTER_FILTER(SCALE_VAAPI,    scale_vaapi,    vf);
-    REGISTER_FILTER(SCALE2REF,      scale2ref,      vf);
-    REGISTER_FILTER(SELECT,         select,         vf);
-    REGISTER_FILTER(SELECTIVECOLOR, selectivecolor, vf);
-    REGISTER_FILTER(SENDCMD,        sendcmd,        vf);
-    REGISTER_FILTER(SEPARATEFIELDS, separatefields, vf);
-    REGISTER_FILTER(SETDAR,         setdar,         vf);
-    REGISTER_FILTER(SETFIELD,       setfield,       vf);
-    REGISTER_FILTER(SETPTS,         setpts,         vf);
-    REGISTER_FILTER(SETRANGE,       setrange,       vf);
-    REGISTER_FILTER(SETSAR,         setsar,         vf);
-    REGISTER_FILTER(SETTB,          settb,          vf);
-    REGISTER_FILTER(SHARPNESS_VAAPI, sharpness_vaapi, vf);
-    REGISTER_FILTER(SHOWINFO,       showinfo,       vf);
-    REGISTER_FILTER(SHOWPALETTE,    showpalette,    vf);
-    REGISTER_FILTER(SHUFFLEFRAMES,  shuffleframes,  vf);
-    REGISTER_FILTER(SHUFFLEPLANES,  shuffleplanes,  vf);
-    REGISTER_FILTER(SIDEDATA,       sidedata,       vf);
-    REGISTER_FILTER(SIGNALSTATS,    signalstats,    vf);
-    REGISTER_FILTER(SIGNATURE,      signature,      vf);
-    REGISTER_FILTER(SMARTBLUR,      smartblur,      vf);
-    REGISTER_FILTER(SOBEL,          sobel,          vf);
-    REGISTER_FILTER(SPLIT,          split,          vf);
-    REGISTER_FILTER(SPP,            spp,            vf);
-    REGISTER_FILTER(SSIM,           ssim,           vf);
-    REGISTER_FILTER(STEREO3D,       stereo3d,       vf);
-    REGISTER_FILTER(STREAMSELECT,   streamselect,   vf);
-    REGISTER_FILTER(SUBTITLES,      subtitles,      vf);
-    REGISTER_FILTER(SUPER2XSAI,     super2xsai,     vf);
-    REGISTER_FILTER(SWAPRECT,       swaprect,       vf);
-    REGISTER_FILTER(SWAPUV,         swapuv,         vf);
-    REGISTER_FILTER(TBLEND,         tblend,         vf);
-    REGISTER_FILTER(TELECINE,       telecine,       vf);
-    REGISTER_FILTER(THRESHOLD,      threshold,      vf);
-    REGISTER_FILTER(THUMBNAIL,      thumbnail,      vf);
-    REGISTER_FILTER(THUMBNAIL_CUDA, thumbnail_cuda, vf);
-    REGISTER_FILTER(TILE,           tile,           vf);
-    REGISTER_FILTER(TINTERLACE,     tinterlace,     vf);
-    REGISTER_FILTER(TLUT2,          tlut2,          vf);
-    REGISTER_FILTER(TONEMAP,        tonemap,        vf);
-    REGISTER_FILTER(TRANSPOSE,      transpose,      vf);
-    REGISTER_FILTER(TRIM,           trim,           vf);
-    REGISTER_FILTER(UNPREMULTIPLY,  unpremultiply,  vf);
-    REGISTER_FILTER(UNSHARP,        unsharp,        vf);
-    REGISTER_FILTER(UNSHARP_OPENCL, unsharp_opencl, vf);
-    REGISTER_FILTER(USPP,           uspp,           vf);
-    REGISTER_FILTER(VAGUEDENOISER,  vaguedenoiser,  vf);
-    REGISTER_FILTER(VECTORSCOPE,    vectorscope,    vf);
-    REGISTER_FILTER(VFLIP,          vflip,          vf);
-    REGISTER_FILTER(VIDSTABDETECT,  vidstabdetect,  vf);
-    REGISTER_FILTER(VIDSTABTRANSFORM, vidstabtransform, vf);
-    REGISTER_FILTER(VIGNETTE,       vignette,       vf);
-    REGISTER_FILTER(VMAFMOTION,     vmafmotion,     vf);
-    REGISTER_FILTER(VPP_QSV,        vpp_qsv,        vf);
-    REGISTER_FILTER(VSTACK,         vstack,         vf);
-    REGISTER_FILTER(W3FDIF,         w3fdif,         vf);
-    REGISTER_FILTER(WAVEFORM,       waveform,       vf);
-    REGISTER_FILTER(WEAVE,          weave,          vf);
-    REGISTER_FILTER(XBR,            xbr,            vf);
-    REGISTER_FILTER(YADIF,          yadif,          vf);
-    REGISTER_FILTER(ZMQ,            zmq,            vf);
-    REGISTER_FILTER(ZOOMPAN,        zoompan,        vf);
-    REGISTER_FILTER(ZSCALE,         zscale,         vf);
+    if (!name)
+        return NULL;
 
-    REGISTER_FILTER(ALLRGB,         allrgb,         vsrc);
-    REGISTER_FILTER(ALLYUV,         allyuv,         vsrc);
-    REGISTER_FILTER(CELLAUTO,       cellauto,       vsrc);
-    REGISTER_FILTER(COLOR,          color,          vsrc);
-    REGISTER_FILTER(COREIMAGESRC,   coreimagesrc,   vsrc);
-    REGISTER_FILTER(FREI0R,         frei0r_src,     vsrc);
-    REGISTER_FILTER(HALDCLUTSRC,    haldclutsrc,    vsrc);
-    REGISTER_FILTER(LIFE,           life,           vsrc);
-    REGISTER_FILTER(MANDELBROT,     mandelbrot,     vsrc);
-    REGISTER_FILTER(MPTESTSRC,      mptestsrc,      vsrc);
-    REGISTER_FILTER(NULLSRC,        nullsrc,        vsrc);
-    REGISTER_FILTER(OPENCLSRC,      openclsrc,      vsrc);
-    REGISTER_FILTER(RGBTESTSRC,     rgbtestsrc,     vsrc);
-    REGISTER_FILTER(SMPTEBARS,      smptebars,      vsrc);
-    REGISTER_FILTER(SMPTEHDBARS,    smptehdbars,    vsrc);
-    REGISTER_FILTER(TESTSRC,        testsrc,        vsrc);
-    REGISTER_FILTER(TESTSRC2,       testsrc2,       vsrc);
-    REGISTER_FILTER(YUVTESTSRC,     yuvtestsrc,     vsrc);
+    while ((f = av_filter_iterate(&opaque)))
+        if (!strcmp(f->name, name))
+            return (AVFilter *)f;
 
-    REGISTER_FILTER(NULLSINK,       nullsink,       vsink);
+    return NULL;
+}
 
-    /* multimedia filters */
-    REGISTER_FILTER(ABITSCOPE,      abitscope,      avf);
-    REGISTER_FILTER(ADRAWGRAPH,     adrawgraph,     avf);
-    REGISTER_FILTER(AHISTOGRAM,     ahistogram,     avf);
-    REGISTER_FILTER(APHASEMETER,    aphasemeter,    avf);
-    REGISTER_FILTER(AVECTORSCOPE,   avectorscope,   avf);
-    REGISTER_FILTER(CONCAT,         concat,         avf);
-    REGISTER_FILTER(SHOWCQT,        showcqt,        avf);
-    REGISTER_FILTER(SHOWFREQS,      showfreqs,      avf);
-    REGISTER_FILTER(SHOWSPECTRUM,   showspectrum,   avf);
-    REGISTER_FILTER(SHOWSPECTRUMPIC, showspectrumpic, avf);
-    REGISTER_FILTER(SHOWVOLUME,     showvolume,     avf);
-    REGISTER_FILTER(SHOWWAVES,      showwaves,      avf);
-    REGISTER_FILTER(SHOWWAVESPIC,   showwavespic,   avf);
-    REGISTER_FILTER(SPECTRUMSYNTH,  spectrumsynth,  vaf);
 
-    /* multimedia sources */
-    REGISTER_FILTER(AMOVIE,         amovie,         avsrc);
-    REGISTER_FILTER(MOVIE,          movie,          avsrc);
+#if FF_API_NEXT
+FF_DISABLE_DEPRECATION_WARNINGS
+static AVOnce av_filter_next_init = AV_ONCE_INIT;
 
-    /* those filters are part of public or internal API => registered
-     * unconditionally */
-    REGISTER_FILTER_UNCONDITIONAL(asrc_abuffer);
-    REGISTER_FILTER_UNCONDITIONAL(vsrc_buffer);
-    REGISTER_FILTER_UNCONDITIONAL(asink_abuffer);
-    REGISTER_FILTER_UNCONDITIONAL(vsink_buffer);
-    REGISTER_FILTER_UNCONDITIONAL(af_afifo);
-    REGISTER_FILTER_UNCONDITIONAL(vf_fifo);
+static void av_filter_init_next(void)
+{
+    AVFilter *prev = NULL, *p;
+    void *i = 0;
+    while ((p = (AVFilter*)av_filter_iterate(&i))) {
+        if (prev)
+            prev->next = p;
+        prev = p;
+    }
 }
 
 void avfilter_register_all(void)
 {
-    static AVOnce control = AV_ONCE_INIT;
+    ff_thread_once(&av_filter_next_init, av_filter_init_next);
+}
+
+int avfilter_register(AVFilter *filter)
+{
+    ff_thread_once(&av_filter_next_init, av_filter_init_next);
+
+    return 0;
+}
+
+const AVFilter *avfilter_next(const AVFilter *prev)
+{
+    ff_thread_once(&av_filter_next_init, av_filter_init_next);
 
-    ff_thread_once(&control, register_all);
+    return prev ? prev->next : filter_list[0];
 }
+
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 7553f7c36a..ed8161136c 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -575,51 +575,6 @@  int avfilter_process_command(AVFilterContext *filter, const char *cmd, const cha
     return AVERROR(ENOSYS);
 }
 
-static AVFilter *first_filter;
-static AVFilter **last_filter = &first_filter;
-
-const AVFilter *avfilter_get_by_name(const char *name)
-{
-    const AVFilter *f = NULL;
-
-    if (!name)
-        return NULL;
-
-    while ((f = avfilter_next(f)))
-        if (!strcmp(f->name, name))
-            return (AVFilter *)f;
-
-    return NULL;
-}
-
-static AVMutex filter_register_mutex = AV_MUTEX_INITIALIZER;
-
-int avfilter_register(AVFilter *filter)
-{
-    AVFilter **f;
-
-    /* the filter must select generic or internal exclusively */
-    av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
-
-    ff_mutex_lock(&filter_register_mutex);
-    f = last_filter;
-
-    while (*f)
-        f = &(*f)->next;
-    *f = filter;
-    filter->next = NULL;
-    last_filter = &filter->next;
-
-    ff_mutex_unlock(&filter_register_mutex);
-
-    return 0;
-}
-
-const AVFilter *avfilter_next(const AVFilter *prev)
-{
-    return prev ? prev->next : first_filter;
-}
-
 int avfilter_pad_count(const AVFilterPad *pads)
 {
     int count;
@@ -648,10 +603,11 @@  static void *filter_child_next(void *obj, void *prev)
 
 static const AVClass *filter_child_class_next(const AVClass *prev)
 {
+    void *opaque = NULL;
     const AVFilter *f = NULL;
 
     /* find the filter that corresponds to prev */
-    while (prev && (f = avfilter_next(f)))
+    while (prev && (f = av_filter_iterate(&opaque)))
         if (f->priv_class == prev)
             break;
 
@@ -660,7 +616,7 @@  static const AVClass *filter_child_class_next(const AVClass *prev)
         return NULL;
 
     /* find next filter with specific options */
-    while ((f = avfilter_next(f)))
+    while ((f = av_filter_iterate(&opaque)))
         if (f->priv_class)
             return f->priv_class;
 
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 2d1195eeeb..9d70e7118b 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -697,7 +697,20 @@  int avfilter_config_links(AVFilterContext *filter);
  */
 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags);
 
+/**
+ * Iterate over all registered filters.
+ *
+ * @param opaque a pointer where libavfilter will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered filter or NULL when the iteration is
+ *         finished
+ */
+const AVFilter *av_filter_iterate(void **opaque);
+
+#if FF_API_NEXT
 /** Initialize the filter system. Register all builtin filters. */
+attribute_deprecated
 void avfilter_register_all(void);
 
 /**
@@ -710,8 +723,18 @@  void avfilter_register_all(void);
  * @return 0 if the registration was successful, a negative value
  * otherwise
  */
+attribute_deprecated
 int avfilter_register(AVFilter *filter);
 
+/**
+ * Iterate over all registered filters.
+ * @return If prev is non-NULL, next registered filter after prev or NULL if
+ * prev is the last filter. If prev is NULL, return the first registered filter.
+ */
+attribute_deprecated
+const AVFilter *avfilter_next(const AVFilter *prev);
+#endif
+
 /**
  * Get a filter definition matching the given name.
  *
@@ -721,12 +744,6 @@  int avfilter_register(AVFilter *filter);
  */
 const AVFilter *avfilter_get_by_name(const char *name);
 
-/**
- * Iterate over all registered filters.
- * @return If prev is non-NULL, next registered filter after prev or NULL if
- * prev is the last filter. If prev is NULL, return the first registered filter.
- */
-const AVFilter *avfilter_next(const AVFilter *prev);
 
 /**
  * Initialize a filter with the supplied parameters.
diff --git a/libavfilter/version.h b/libavfilter/version.h
index babb4187b4..8d77a500bf 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -58,5 +58,8 @@ 
 #ifndef FF_API_FILTER_GET_SET
 #define FF_API_FILTER_GET_SET               (LIBAVFILTER_VERSION_MAJOR < 8)
 #endif
+#ifndef FF_API_NEXT
+#define FF_API_NEXT                         (LIBAVFILTER_VERSION_MAJOR < 8)
+#endif
 
 #endif /* AVFILTER_VERSION_H */