[FFmpeg-devel] [PATCH] avformat/dv: fix timestamps of audio packets in case of dropped corrupt audio frames

[Carl Eugen Hoyos]

Am Sa., 31. Okt. 2020 um 19:43 Uhr schrieb Dave Rice <dave at dericed.com>:
>
> Hi Marton,
>
> > On Oct 31, 2020, at 12:56 PM, Marton Balint <cus at passwd.hu> wrote:
> >
> > Fixes out of sync timestamps in ticket #8762.
>
> Although Michael’s recent patch does address the issue documented in 8762, I haven’t found this patch to fix the issue. I tried with -c:a copy and with -c:a pcm_s16le with some sample files that exhibit this issue but each output was out of sync. I put an output at https://gist.github.com/dericed/659bd843bd38b6f24a60198b5e345795. That output notes that 3597 packages of video are read and 3586 packets of audio. In the resulting file, at the end of the timeline the audio is 9 frames out of sync and my output video stream is 00:02:00.020 and output audio stream is 00:01:59.653.
>
> Beyond copying or encoding the audio, are there other options I should use to test this?

Maybe I misunderstand the issue but if audio is missing and you don't
re-encode (and
force the missing audio to be inserted), you will always run into
issues because of how
audio is generally interpreted in multimedia files.

Carl Eugen