[MPlayer-dev-eng] [PATCH] muxer_lavf: fix compilation with newer FFmpeg.

[Alexander Strasser]

On 2021-05-03 08:32 +0200, Reimar Döffinger wrote:
>
> > On 2 May 2021, at 23:48, Alexander Strasser <eclipse7 at gmx.net> wrote:
> >
> > I tested this patch a little and it seems to be fine.
> >
> > I noticed one difference in output files I can't explain; though
> > somehow the new output seems to be more correct than the old one.
> >
> > If you check the output of
> >
> >    mencoder "$FATE_SAMPLES"/msmpeg4v1/mpg4.avi -ovc copy -of lavf -o mpeg4-muxer_lavf.avi
> >
> > MPlayer says (version without patch vs version with patch)
> >
> >    VIDEO:  [MPG4]  352x240  24bpp  600.000 fps  1513.3 kbps (184.7 kbyte/s)
> >    VIDEO:  [MPG4]  352x240  24bpp  29.970 fps  1484.6 kbps (181.2 kbyte/s)
> >
>
> That is expected, the code before set the codec time base, which if it ever
> was used, at least was not used recently by FFmpeg.
> It now sets the stream time base, which works.
> There is a risk (I did not investigate) that it breaks some variable frame rate
> content, however I think mencoder can’t handle that anyway.

I see. Would probably be good to mention it in the commit message.


  Alexander