[FFmpeg-devel] [PATCH] avformat/mpegts: fix teletext PTS when selecting teletext streams only

[Jan Ekström]

On Sat, Aug 24, 2019 at 2:04 AM Marton Balint <cus at passwd.hu> wrote:
>
> After a1b4f120c031e6697bac9fd8c725d9c37ee36d13 the teletext PTS values were set
> to AV_NOPTS_VALUE if the stream of the PCR pid was discarded.
>
> What actually matters is that if we parse the PCR of the PCR PID or not, so
> let's use the cached discard value of the actual PCR PID instead of the stream
> discard value, which may be different.
>
> Also fixes ticket #7567, which was caused by the fact that teletext PTS values
> were not touched if the PCR pid was discarded even before
> a1b4f120c031e6697bac9fd8c725d9c37ee36d13.
>
> Signed-off-by: Marton Balint <cus at passwd.hu>
> ---

I just hit this myself, and this seems to indeed fix the case where
you f.ex. -map only the teletext stream with ffmpeg.c and output f.ex.
SRT. So in that sense this seems like a sensible change.

Would be much obliged if someone could run this through FATE? I will
attempt during this week to create a minimal sample so we could get a
FATE test for this behavior :) (as this is demux-only).

Best regards,
Jan