| Message ID | 20231210013550.786075-1-marth64@proxyid.net |
|---|---|
| State | New |
| Headers | show |
| Series | [FFmpeg-devel] doc/bitstream_filters: add filter_units practical examples for removing closed captions | expand |
| Context | Check | Description |
|---|---|---|
| yinshiyou/make_loongarch64 | success | Make finished |
| yinshiyou/make_fate_loongarch64 | success | Make fate finished |
| andriy/make_x86 | success | Make finished |
| andriy/make_fate_x86 | success | Make fate finished |
On 12/9/23 20:35, Marth64 wrote: > --- > doc/bitstream_filters.texi | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > Make sure when you generate the second version of a patch with git format-patch you pass the -v2 argument, e.g. git format-patch -v2 -o outgoing/ master Otherwise it can get a little bit difficult for reviewers to track the versions. I have no comments on the patch itself, in either direction. - Leo Izen (Traneptora)
Thank you! On Sat, Dec 9, 2023 at 9:06 PM Leo Izen <leo.izen@gmail.com> wrote: > On 12/9/23 20:35, Marth64 wrote: > > --- > > doc/bitstream_filters.texi | 18 ++++++++++++++++++ > > 1 file changed, 18 insertions(+) > > > > Make sure when you generate the second version of a patch with git > format-patch you pass the -v2 argument, e.g. > > git format-patch -v2 -o outgoing/ master > > Otherwise it can get a little bit difficult for reviewers to track the > versions. I have no comments on the patch itself, in either direction. > > - Leo Izen (Traneptora) > _______________________________________________ > 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". >
On date Saturday 2023-12-09 19:35:50 -0600, Marth64 wrote: > --- > doc/bitstream_filters.texi | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi > index c63c20370f..d2ad6e78ff 100644 > --- a/doc/bitstream_filters.texi > +++ b/doc/bitstream_filters.texi > @@ -213,6 +213,24 @@ To remove all AUDs, SEI and filler from an H.265 stream: > ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=35|38-40' OUTPUT > @end example > > +SEI messages are commonly used to contain Closed Captions as well as other metadata such as dynamic HDR. > +This filter can be used to remove the SEI messages if desired. > + > +To remove SEI messages (including CC) from a MPEG-2 stream: > +@example > +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=178' OUTPUT > +@end example > + > +To remove SEI messages (including CC) from a H264 stream: > +@example > +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=6' OUTPUT > +@end example > + > +To remove SEI messages (including CC and dynamic HDR) from a HEVC stream: > +@example > +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=39' OUTPUT > +@end example Shall be good, but probably we can still do a bit better, by making explicit the common pattern. Something as: ... SEI messages are commonly used to contain Closed Captions as well as other metadata such as dynamic HDR. This filter can be used to remove the SEI messages, including CC, given the bitstream SEI unit type (which changes depending on the video stream). To remove SEI messages (including CC) from a MPEG-2 stream: ...
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi index c63c20370f..d2ad6e78ff 100644 --- a/doc/bitstream_filters.texi +++ b/doc/bitstream_filters.texi @@ -213,6 +213,24 @@ To remove all AUDs, SEI and filler from an H.265 stream: ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=35|38-40' OUTPUT @end example +SEI messages are commonly used to contain Closed Captions as well as other metadata such as dynamic HDR. +This filter can be used to remove the SEI messages if desired. + +To remove SEI messages (including CC) from a MPEG-2 stream: +@example +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=178' OUTPUT +@end example + +To remove SEI messages (including CC) from a H264 stream: +@example +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=6' OUTPUT +@end example + +To remove SEI messages (including CC and dynamic HDR) from a HEVC stream: +@example +ffmpeg -i INPUT -c:v copy -bsf:v 'filter_units=remove_types=39' OUTPUT +@end example + @section hapqa_extract Extract Rgb or Alpha part of an HAPQA file, without recompression, in order to create an HAPQ or an HAPAlphaOnly file.