diff mbox

[FFmpeg-devel,v3] avformat/movenc: split empty text sample when duration overflow

Message ID CA+ihTqk6pYuTM7aJ8Uuv_N9Vo4uiLAdAzisUqpR0U+HF7Bf5qw@mail.gmail.com
State Superseded
Headers show

Commit Message

Jun Li Oct. 2, 2019, 12:20 a.m. UTC
On Tue, Oct 1, 2019 at 4:19 AM Carl Eugen Hoyos <ceffmpeg@gmail.com> wrote:

> Am Di., 10. Sept. 2019 um 21:12 Uhr schrieb Jun Li <junli1026@gmail.com>:
> >
> > Fix #7637
> > One empty/end sample is created and inserted between two caption lines
> when there is a gap.
> > This patch is to split the sample into multiple ones when its duration
> is too long (>= INT_MAX).
> > ---
> >  libavformat/movenc.c                          | 24 ++++++++++++++-----
> >  tests/fate/subtitles.mak                      |  6 +++++
> >  tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
> >  .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
> >  4 files changed, 26 insertions(+), 6 deletions(-)
> >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
> >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur-timebase
> >
> > diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> > index edddfeeb00..aeb7de351f 100644
> > --- a/libavformat/movenc.c
> > +++ b/libavformat/movenc.c
> > @@ -5746,7 +5746,8 @@ static int mov_write_packet(AVFormatContext *s,
> AVPacket *pkt)
> >           *
> >           * 2) For each subtitle track, check if the current packet's
> >           * dts is past the duration of the last subtitle sample. If
> > -         * so, we now need to write an end sample for that subtitle.
> > +         * so, we now need to write one or multiple end samples for
> > +         * that subtitle.
> >           *
> >           * This must be done conditionally to allow for subtitles that
> >           * immediately replace each other, in which case an end sample
> > @@ -5760,11 +5761,22 @@ static int mov_write_packet(AVFormatContext *s,
> AVPacket *pkt)
> >              int ret;
> >
> >              if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
> > -                trk->track_duration < pkt->dts &&
> > -                (trk->entry == 0 || !trk->last_sample_is_subtitle_end))
> {
> > -                ret = mov_write_subtitle_end_packet(s, i,
> trk->track_duration);
> > -                if (ret < 0) return ret;
> > -                trk->last_sample_is_subtitle_end = 1;
> > +                trk->track_duration < pkt->dts) {
> > +                int max_duration = INT_MAX - 1;
> > +                if (trk->entry == 0 ||
> !trk->last_sample_is_subtitle_end) {
> > +                    ret = mov_write_subtitle_end_packet(s, i,
> trk->track_duration);
>
> > +                    if (ret < 0) return ret;
>
> > +                    trk->last_sample_is_subtitle_end = 1;
> > +                }
> > +                if (trk->last_sample_is_subtitle_end &&
> > +                    pkt->dts - trk->track_duration > max_duration) {
> > +                    int64_t dts = trk->track_duration;
> > +                    while(pkt->dts - dts > max_duration) {
> > +                        dts += max_duration;
> > +                        ret = mov_write_subtitle_end_packet(s, i, dts);
>
> > +                        if (ret < 0) return ret;
>
> Please add two CRLFs and I am threatening to push this.
>
> Carl Eugen
> _______________________________________________
> 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".


Thanks Carl for review. Code is updated as follows.



Fix #7637
One empty/end sample is created and inserted between two caption lines when
there is a gap.
This patch is to split the sample into multiple ones when its duration is
too long (>= INT_MAX)
---
 libavformat/movenc.c                          | 26 ++++++++++++++-----
 tests/fate/subtitles.mak                      |  6 +++++
 tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
 .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
 4 files changed, 28 insertions(+), 6 deletions(-)
 create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
 create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur-timebase

Comments

Jun Li Oct. 2, 2019, 10:10 p.m. UTC | #1
On Tue, Oct 1, 2019 at 5:20 PM Jun Li <junli1026@gmail.com> wrote:

>
>
> On Tue, Oct 1, 2019 at 4:19 AM Carl Eugen Hoyos <ceffmpeg@gmail.com>
> wrote:
>
>> Am Di., 10. Sept. 2019 um 21:12 Uhr schrieb Jun Li <junli1026@gmail.com>:
>> >
>> > Fix #7637
>> > One empty/end sample is created and inserted between two caption lines
>> when there is a gap.
>> > This patch is to split the sample into multiple ones when its duration
>> is too long (>= INT_MAX).
>> > ---
>> >  libavformat/movenc.c                          | 24 ++++++++++++++-----
>> >  tests/fate/subtitles.mak                      |  6 +++++
>> >  tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
>> >  .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
>> >  4 files changed, 26 insertions(+), 6 deletions(-)
>> >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
>> >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur-timebase
>> >
>> > diff --git a/libavformat/movenc.c b/libavformat/movenc.c
>> > index edddfeeb00..aeb7de351f 100644
>> > --- a/libavformat/movenc.c
>> > +++ b/libavformat/movenc.c
>> > @@ -5746,7 +5746,8 @@ static int mov_write_packet(AVFormatContext *s,
>> AVPacket *pkt)
>> >           *
>> >           * 2) For each subtitle track, check if the current packet's
>> >           * dts is past the duration of the last subtitle sample. If
>> > -         * so, we now need to write an end sample for that subtitle.
>> > +         * so, we now need to write one or multiple end samples for
>> > +         * that subtitle.
>> >           *
>> >           * This must be done conditionally to allow for subtitles that
>> >           * immediately replace each other, in which case an end sample
>> > @@ -5760,11 +5761,22 @@ static int mov_write_packet(AVFormatContext *s,
>> AVPacket *pkt)
>> >              int ret;
>> >
>> >              if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
>> > -                trk->track_duration < pkt->dts &&
>> > -                (trk->entry == 0 ||
>> !trk->last_sample_is_subtitle_end)) {
>> > -                ret = mov_write_subtitle_end_packet(s, i,
>> trk->track_duration);
>> > -                if (ret < 0) return ret;
>> > -                trk->last_sample_is_subtitle_end = 1;
>> > +                trk->track_duration < pkt->dts) {
>> > +                int max_duration = INT_MAX - 1;
>> > +                if (trk->entry == 0 ||
>> !trk->last_sample_is_subtitle_end) {
>> > +                    ret = mov_write_subtitle_end_packet(s, i,
>> trk->track_duration);
>>
>> > +                    if (ret < 0) return ret;
>>
>> > +                    trk->last_sample_is_subtitle_end = 1;
>> > +                }
>> > +                if (trk->last_sample_is_subtitle_end &&
>> > +                    pkt->dts - trk->track_duration > max_duration) {
>> > +                    int64_t dts = trk->track_duration;
>> > +                    while(pkt->dts - dts > max_duration) {
>> > +                        dts += max_duration;
>> > +                        ret = mov_write_subtitle_end_packet(s, i, dts);
>>
>> > +                        if (ret < 0) return ret;
>>
>> Please add two CRLFs and I am threatening to push this.
>>
>> Carl Eugen
>> _______________________________________________
>> 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".
>
>
> Thanks Carl for review. Code is updated as follows.
>
>
>
> Fix #7637
> One empty/end sample is created and inserted between two caption lines
> when there is a gap.
> This patch is to split the sample into multiple ones when its duration is
> too long (>= INT_MAX)
> ---
>  libavformat/movenc.c                          | 26 ++++++++++++++-----
>  tests/fate/subtitles.mak                      |  6 +++++
>  tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
>  .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
>  4 files changed, 28 insertions(+), 6 deletions(-)
>  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
>  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur-timebase
>
> diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> index edddfeeb00..db6f5afefc 100644
> --- a/libavformat/movenc.c
> +++ b/libavformat/movenc.c
> @@ -5746,7 +5746,8 @@ static int mov_write_packet(AVFormatContext *s,
> AVPacket *pkt)
>           *
>           * 2) For each subtitle track, check if the current packet's
>           * dts is past the duration of the last subtitle sample. If
> -         * so, we now need to write an end sample for that subtitle.
> +         * so, we now need to write one or multiple end samples for
> +         * that subtitle.
>           *
>           * This must be done conditionally to allow for subtitles that
>           * immediately replace each other, in which case an end sample
> @@ -5760,11 +5761,24 @@ static int mov_write_packet(AVFormatContext *s,
> AVPacket *pkt)
>              int ret;
>
>              if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
> -                trk->track_duration < pkt->dts &&
> -                (trk->entry == 0 || !trk->last_sample_is_subtitle_end)) {
> -                ret = mov_write_subtitle_end_packet(s, i,
> trk->track_duration);
> -                if (ret < 0) return ret;
> -                trk->last_sample_is_subtitle_end = 1;
> +                trk->track_duration < pkt->dts) {
> +                int max_duration = INT_MAX - 1;
> +                if (trk->entry == 0 || !trk->last_sample_is_subtitle_end)
> {
> +                    ret = mov_write_subtitle_end_packet(s, i,
> trk->track_duration);
> +                    if (ret < 0)
> +                        return ret;
> +                    trk->last_sample_is_subtitle_end = 1;
> +                }
> +                if (trk->last_sample_is_subtitle_end &&
> +                    pkt->dts - trk->track_duration > max_duration) {
> +                    int64_t dts = trk->track_duration;
> +                    while(pkt->dts - dts > max_duration) {
> +                        dts += max_duration;
> +                        ret = mov_write_subtitle_end_packet(s, i, dts);
> +                        if (ret < 0)
> +                            return ret;
> +                    }
> +                }
>              }
>          }
>
> diff --git a/tests/fate/subtitles.mak b/tests/fate/subtitles.mak
> index 0042902161..4c2b34c431 100644
> --- a/tests/fate/subtitles.mak
> +++ b/tests/fate/subtitles.mak
> @@ -34,6 +34,12 @@ fate-sub-movtext: CMD = fmtstdout ass -i
> $(TARGET_SAMPLES)/sub/MovText_capabilit
>  FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) += fate-binsub-movtextenc
>  fate-binsub-movtextenc: CMD = md5 -i
> $(TARGET_SAMPLES)/sub/MovText_capability_tester.mp4 -map 0 -scodec mov_text
> -f mp4 -flags +bitexact -fflags +bitexact -movflags frag_keyframe+empty_moov
>
> +FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) +=
> fate-binsub-movtextenc-long-dur
> +fate-binsub-movtextenc-long-dur: CMD = md5 -i
> $(TARGET_SAMPLES)/sub/WebVTT_movtext_long_dur.vtt -map 0 -scodec mov_text
> -f mp4 -flags +bitexact -fflags +bitexact -movflags frag_keyframe+empty_moov
> +
> +FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) +=
> fate-binsub-movtextenc-long-dur-timebase
> +fate-binsub-movtextenc-long-dur-timebase: CMD = md5 -i
> $(TARGET_SAMPLES)/sub/WebVTT_movtext_long_dur.vtt -map 0 -scodec mov_text
> -time_base 1000 -f mp4 -flags +bitexact -fflags +bitexact -movflags
> frag_keyframe+empty_moov
> +
>  FATE_SUBTITLES_ASS-$(call DEMDEC, MPL2, MPL2) += fate-sub-mpl2
>  fate-sub-mpl2: CMD = fmtstdout ass -i
> $(TARGET_SAMPLES)/sub/MPL2_capability_tester.txt
>
> diff --git a/tests/ref/fate/binsub-movtextenc-long-dur
> b/tests/ref/fate/binsub-movtextenc-long-dur
> new file mode 100644
> index 0000000000..eb8a3f8fc7
> --- /dev/null
> +++ b/tests/ref/fate/binsub-movtextenc-long-dur
> @@ -0,0 +1 @@
> +7f78c11bb4a6b16335540ef31ba10219
> diff --git a/tests/ref/fate/binsub-movtextenc-long-dur-timebase
> b/tests/ref/fate/binsub-movtextenc-long-dur-timebase
> new file mode 100644
> index 0000000000..185dcc0aab
> --- /dev/null
> +++ b/tests/ref/fate/binsub-movtextenc-long-dur-timebase
> @@ -0,0 +1 @@
> +349d78698cc1226d33d4e6699dbf46d9
> --
> 2.17.1
>
>
Hi Carl, is a patch file necessary or pasting like above is just fine ?


>
>

>
Carl Eugen Hoyos Oct. 2, 2019, 10:22 p.m. UTC | #2
Am Mi., 2. Okt. 2019 um 02:21 Uhr schrieb Jun Li <junli1026@gmail.com>:
>
> On Tue, Oct 1, 2019 at 4:19 AM Carl Eugen Hoyos <ceffmpeg@gmail.com> wrote:
>
> > Am Di., 10. Sept. 2019 um 21:12 Uhr schrieb Jun Li <junli1026@gmail.com>:
> > >
> > > Fix #7637
> > > One empty/end sample is created and inserted between two caption lines
> > when there is a gap.
> > > This patch is to split the sample into multiple ones when its duration
> > is too long (>= INT_MAX).
> > > ---
> > >  libavformat/movenc.c                          | 24 ++++++++++++++-----
> > >  tests/fate/subtitles.mak                      |  6 +++++
> > >  tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
> > >  .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
> > >  4 files changed, 26 insertions(+), 6 deletions(-)
> > >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
> > >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur-timebase
> > >
> > > diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> > > index edddfeeb00..aeb7de351f 100644
> > > --- a/libavformat/movenc.c
> > > +++ b/libavformat/movenc.c
> > > @@ -5746,7 +5746,8 @@ static int mov_write_packet(AVFormatContext *s,
> > AVPacket *pkt)
> > >           *
> > >           * 2) For each subtitle track, check if the current packet's
> > >           * dts is past the duration of the last subtitle sample. If
> > > -         * so, we now need to write an end sample for that subtitle.
> > > +         * so, we now need to write one or multiple end samples for
> > > +         * that subtitle.
> > >           *
> > >           * This must be done conditionally to allow for subtitles that
> > >           * immediately replace each other, in which case an end sample
> > > @@ -5760,11 +5761,22 @@ static int mov_write_packet(AVFormatContext *s,
> > AVPacket *pkt)
> > >              int ret;
> > >
> > >              if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
> > > -                trk->track_duration < pkt->dts &&
> > > -                (trk->entry == 0 || !trk->last_sample_is_subtitle_end))
> > {
> > > -                ret = mov_write_subtitle_end_packet(s, i,
> > trk->track_duration);
> > > -                if (ret < 0) return ret;
> > > -                trk->last_sample_is_subtitle_end = 1;
> > > +                trk->track_duration < pkt->dts) {
> > > +                int max_duration = INT_MAX - 1;
> > > +                if (trk->entry == 0 ||
> > !trk->last_sample_is_subtitle_end) {
> > > +                    ret = mov_write_subtitle_end_packet(s, i,
> > trk->track_duration);
> >
> > > +                    if (ret < 0) return ret;
> >
> > > +                    trk->last_sample_is_subtitle_end = 1;
> > > +                }
> > > +                if (trk->last_sample_is_subtitle_end &&
> > > +                    pkt->dts - trk->track_duration > max_duration) {
> > > +                    int64_t dts = trk->track_duration;
> > > +                    while(pkt->dts - dts > max_duration) {
> > > +                        dts += max_duration;
> > > +                        ret = mov_write_subtitle_end_packet(s, i, dts);
> >
> > > +                        if (ret < 0) return ret;
> >
> > Please add two CRLFs and I am threatening to push this.
> >
> > Carl Eugen
> > _______________________________________________
> > 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".
>
>
> Thanks Carl for review. Code is updated as follows.

git returns an error message ("corrupt line") when I try to
commit this patch.

Carl Eugen
Jun Li Oct. 2, 2019, 10:42 p.m. UTC | #3
On Wed, Oct 2, 2019 at 3:22 PM Carl Eugen Hoyos <ceffmpeg@gmail.com> wrote:

> Am Mi., 2. Okt. 2019 um 02:21 Uhr schrieb Jun Li <junli1026@gmail.com>:
> >
> > On Tue, Oct 1, 2019 at 4:19 AM Carl Eugen Hoyos <ceffmpeg@gmail.com>
> wrote:
> >
> > > Am Di., 10. Sept. 2019 um 21:12 Uhr schrieb Jun Li <
> junli1026@gmail.com>:
> > > >
> > > > Fix #7637
> > > > One empty/end sample is created and inserted between two caption
> lines
> > > when there is a gap.
> > > > This patch is to split the sample into multiple ones when its
> duration
> > > is too long (>= INT_MAX).
> > > > ---
> > > >  libavformat/movenc.c                          | 24
> ++++++++++++++-----
> > > >  tests/fate/subtitles.mak                      |  6 +++++
> > > >  tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
> > > >  .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
> > > >  4 files changed, 26 insertions(+), 6 deletions(-)
> > > >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
> > > >  create mode 100644
> tests/ref/fate/binsub-movtextenc-long-dur-timebase
> > > >
> > > > diff --git a/libavformat/movenc.c b/libavformat/movenc.c
> > > > index edddfeeb00..aeb7de351f 100644
> > > > --- a/libavformat/movenc.c
> > > > +++ b/libavformat/movenc.c
> > > > @@ -5746,7 +5746,8 @@ static int mov_write_packet(AVFormatContext *s,
> > > AVPacket *pkt)
> > > >           *
> > > >           * 2) For each subtitle track, check if the current packet's
> > > >           * dts is past the duration of the last subtitle sample. If
> > > > -         * so, we now need to write an end sample for that subtitle.
> > > > +         * so, we now need to write one or multiple end samples for
> > > > +         * that subtitle.
> > > >           *
> > > >           * This must be done conditionally to allow for subtitles
> that
> > > >           * immediately replace each other, in which case an end
> sample
> > > > @@ -5760,11 +5761,22 @@ static int mov_write_packet(AVFormatContext
> *s,
> > > AVPacket *pkt)
> > > >              int ret;
> > > >
> > > >              if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
> > > > -                trk->track_duration < pkt->dts &&
> > > > -                (trk->entry == 0 ||
> !trk->last_sample_is_subtitle_end))
> > > {
> > > > -                ret = mov_write_subtitle_end_packet(s, i,
> > > trk->track_duration);
> > > > -                if (ret < 0) return ret;
> > > > -                trk->last_sample_is_subtitle_end = 1;
> > > > +                trk->track_duration < pkt->dts) {
> > > > +                int max_duration = INT_MAX - 1;
> > > > +                if (trk->entry == 0 ||
> > > !trk->last_sample_is_subtitle_end) {
> > > > +                    ret = mov_write_subtitle_end_packet(s, i,
> > > trk->track_duration);
> > >
> > > > +                    if (ret < 0) return ret;
> > >
> > > > +                    trk->last_sample_is_subtitle_end = 1;
> > > > +                }
> > > > +                if (trk->last_sample_is_subtitle_end &&
> > > > +                    pkt->dts - trk->track_duration > max_duration) {
> > > > +                    int64_t dts = trk->track_duration;
> > > > +                    while(pkt->dts - dts > max_duration) {
> > > > +                        dts += max_duration;
> > > > +                        ret = mov_write_subtitle_end_packet(s, i,
> dts);
> > >
> > > > +                        if (ret < 0) return ret;
> > >
> > > Please add two CRLFs and I am threatening to push this.
> > >
> > > Carl Eugen
> > > _______________________________________________
> > > 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".
> >
> >
> > Thanks Carl for review. Code is updated as follows.
>
> git returns an error message ("corrupt line") when I try to
> commit this patch.
>
> Thanks for your time, I rebased the code and re-generated a patch,
together with the fate test file, in the attachments.
Could you please help do a re-try ? Thanks.

-Jun


> Carl Eugen
> _______________________________________________
> 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".
Jun Li Oct. 4, 2019, 12:28 a.m. UTC | #4
On Wed, Oct 2, 2019 at 3:42 PM Jun Li <junli1026@gmail.com> wrote:

>
>
> On Wed, Oct 2, 2019 at 3:22 PM Carl Eugen Hoyos <ceffmpeg@gmail.com>
> wrote:
>
>> Am Mi., 2. Okt. 2019 um 02:21 Uhr schrieb Jun Li <junli1026@gmail.com>:
>> >
>> > On Tue, Oct 1, 2019 at 4:19 AM Carl Eugen Hoyos <ceffmpeg@gmail.com>
>> wrote:
>> >
>> > > Am Di., 10. Sept. 2019 um 21:12 Uhr schrieb Jun Li <
>> junli1026@gmail.com>:
>> > > >
>> > > > Fix #7637
>> > > > One empty/end sample is created and inserted between two caption
>> lines
>> > > when there is a gap.
>> > > > This patch is to split the sample into multiple ones when its
>> duration
>> > > is too long (>= INT_MAX).
>> > > > ---
>> > > >  libavformat/movenc.c                          | 24
>> ++++++++++++++-----
>> > > >  tests/fate/subtitles.mak                      |  6 +++++
>> > > >  tests/ref/fate/binsub-movtextenc-long-dur     |  1 +
>> > > >  .../fate/binsub-movtextenc-long-dur-timebase  |  1 +
>> > > >  4 files changed, 26 insertions(+), 6 deletions(-)
>> > > >  create mode 100644 tests/ref/fate/binsub-movtextenc-long-dur
>> > > >  create mode 100644
>> tests/ref/fate/binsub-movtextenc-long-dur-timebase
>> > > >
>> > > > diff --git a/libavformat/movenc.c b/libavformat/movenc.c
>> > > > index edddfeeb00..aeb7de351f 100644
>> > > > --- a/libavformat/movenc.c
>> > > > +++ b/libavformat/movenc.c
>> > > > @@ -5746,7 +5746,8 @@ static int mov_write_packet(AVFormatContext
>> *s,
>> > > AVPacket *pkt)
>> > > >           *
>> > > >           * 2) For each subtitle track, check if the current
>> packet's
>> > > >           * dts is past the duration of the last subtitle sample. If
>> > > > -         * so, we now need to write an end sample for that
>> subtitle.
>> > > > +         * so, we now need to write one or multiple end samples for
>> > > > +         * that subtitle.
>> > > >           *
>> > > >           * This must be done conditionally to allow for subtitles
>> that
>> > > >           * immediately replace each other, in which case an end
>> sample
>> > > > @@ -5760,11 +5761,22 @@ static int mov_write_packet(AVFormatContext
>> *s,
>> > > AVPacket *pkt)
>> > > >              int ret;
>> > > >
>> > > >              if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
>> > > > -                trk->track_duration < pkt->dts &&
>> > > > -                (trk->entry == 0 ||
>> !trk->last_sample_is_subtitle_end))
>> > > {
>> > > > -                ret = mov_write_subtitle_end_packet(s, i,
>> > > trk->track_duration);
>> > > > -                if (ret < 0) return ret;
>> > > > -                trk->last_sample_is_subtitle_end = 1;
>> > > > +                trk->track_duration < pkt->dts) {
>> > > > +                int max_duration = INT_MAX - 1;
>> > > > +                if (trk->entry == 0 ||
>> > > !trk->last_sample_is_subtitle_end) {
>> > > > +                    ret = mov_write_subtitle_end_packet(s, i,
>> > > trk->track_duration);
>> > >
>> > > > +                    if (ret < 0) return ret;
>> > >
>> > > > +                    trk->last_sample_is_subtitle_end = 1;
>> > > > +                }
>> > > > +                if (trk->last_sample_is_subtitle_end &&
>> > > > +                    pkt->dts - trk->track_duration > max_duration)
>> {
>> > > > +                    int64_t dts = trk->track_duration;
>> > > > +                    while(pkt->dts - dts > max_duration) {
>> > > > +                        dts += max_duration;
>> > > > +                        ret = mov_write_subtitle_end_packet(s, i,
>> dts);
>> > >
>> > > > +                        if (ret < 0) return ret;
>> > >
>> > > Please add two CRLFs and I am threatening to push this.
>> > >
>> > > Carl Eugen
>> > > _______________________________________________
>> > > 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".
>> >
>> >
>> > Thanks Carl for review. Code is updated as follows.
>>
>> git returns an error message ("corrupt line") when I try to
>> commit this patch.
>>
>> Thanks for your time, I rebased the code and re-generated a patch,
> together with the fate test file, in the attachments.
> Could you please help do a re-try ? Thanks.
>

Hi Carl, could you please help to try again ? It should work now. Thanks in
advance!


> -Jun
>
>
>> Carl Eugen
>> _______________________________________________
>> 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".
>
>
diff mbox

Patch

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index edddfeeb00..db6f5afefc 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -5746,7 +5746,8 @@  static int mov_write_packet(AVFormatContext *s,
AVPacket *pkt)
          *
          * 2) For each subtitle track, check if the current packet's
          * dts is past the duration of the last subtitle sample. If
-         * so, we now need to write an end sample for that subtitle.
+         * so, we now need to write one or multiple end samples for
+         * that subtitle.
          *
          * This must be done conditionally to allow for subtitles that
          * immediately replace each other, in which case an end sample
@@ -5760,11 +5761,24 @@  static int mov_write_packet(AVFormatContext *s,
AVPacket *pkt)
             int ret;

             if (trk->par->codec_id == AV_CODEC_ID_MOV_TEXT &&
-                trk->track_duration < pkt->dts &&
-                (trk->entry == 0 || !trk->last_sample_is_subtitle_end)) {
-                ret = mov_write_subtitle_end_packet(s, i,
trk->track_duration);
-                if (ret < 0) return ret;
-                trk->last_sample_is_subtitle_end = 1;
+                trk->track_duration < pkt->dts) {
+                int max_duration = INT_MAX - 1;
+                if (trk->entry == 0 || !trk->last_sample_is_subtitle_end) {
+                    ret = mov_write_subtitle_end_packet(s, i,
trk->track_duration);
+                    if (ret < 0)
+                        return ret;
+                    trk->last_sample_is_subtitle_end = 1;
+                }
+                if (trk->last_sample_is_subtitle_end &&
+                    pkt->dts - trk->track_duration > max_duration) {
+                    int64_t dts = trk->track_duration;
+                    while(pkt->dts - dts > max_duration) {
+                        dts += max_duration;
+                        ret = mov_write_subtitle_end_packet(s, i, dts);
+                        if (ret < 0)
+                            return ret;
+                    }
+                }
             }
         }

diff --git a/tests/fate/subtitles.mak b/tests/fate/subtitles.mak
index 0042902161..4c2b34c431 100644
--- a/tests/fate/subtitles.mak
+++ b/tests/fate/subtitles.mak
@@ -34,6 +34,12 @@  fate-sub-movtext: CMD = fmtstdout ass -i
$(TARGET_SAMPLES)/sub/MovText_capabilit
 FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) += fate-binsub-movtextenc
 fate-binsub-movtextenc: CMD = md5 -i
$(TARGET_SAMPLES)/sub/MovText_capability_tester.mp4 -map 0 -scodec mov_text
-f mp4 -flags +bitexact -fflags +bitexact -movflags frag_keyframe+empty_moov

+FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) +=
fate-binsub-movtextenc-long-dur
+fate-binsub-movtextenc-long-dur: CMD = md5 -i
$(TARGET_SAMPLES)/sub/WebVTT_movtext_long_dur.vtt -map 0 -scodec mov_text
-f mp4 -flags +bitexact -fflags +bitexact -movflags frag_keyframe+empty_moov
+
+FATE_SUBTITLES-$(call ENCDEC, MOVTEXT, MOV) +=
fate-binsub-movtextenc-long-dur-timebase
+fate-binsub-movtextenc-long-dur-timebase: CMD = md5 -i
$(TARGET_SAMPLES)/sub/WebVTT_movtext_long_dur.vtt -map 0 -scodec mov_text
-time_base 1000 -f mp4 -flags +bitexact -fflags +bitexact -movflags
frag_keyframe+empty_moov
+
 FATE_SUBTITLES_ASS-$(call DEMDEC, MPL2, MPL2) += fate-sub-mpl2
 fate-sub-mpl2: CMD = fmtstdout ass -i
$(TARGET_SAMPLES)/sub/MPL2_capability_tester.txt

diff --git a/tests/ref/fate/binsub-movtextenc-long-dur
b/tests/ref/fate/binsub-movtextenc-long-dur
new file mode 100644
index 0000000000..eb8a3f8fc7
--- /dev/null
+++ b/tests/ref/fate/binsub-movtextenc-long-dur
@@ -0,0 +1 @@ 
+7f78c11bb4a6b16335540ef31ba10219
diff --git a/tests/ref/fate/binsub-movtextenc-long-dur-timebase
b/tests/ref/fate/binsub-movtextenc-long-dur-timebase
new file mode 100644
index 0000000000..185dcc0aab
--- /dev/null
+++ b/tests/ref/fate/binsub-movtextenc-long-dur-timebase
@@ -0,0 +1 @@ 
+349d78698cc1226d33d4e6699dbf46d9