[Libav-user] libavcodec usage inside Cinelerra-GG [LONG]

[Andrew Randrianasulu]

В сообщении от Sunday 03 November 2019 09:01:42 Carl Eugen Hoyos написал(а):
> Am Sa., 2. Nov. 2019 um 23:32 Uhr schrieb Andrew Randrianasulu
> <randrianasulu at gmail.com>:
> 
> > I think I can also link in https://www.cinelerra-gg.org/bugtracker/view.php?id=330
> > because IMO it shows how wild timestamp can ruin synchro
> 
> I tested the following and the output file has fine noise, no "pulsed noise":
> $ ffmpeg -ss 11:00 -i LD_160909_2.avi -qscale 2 out.avi

Yeah, it should work in ffmpeg. This is why I posted this to Libav-user,
because Cinelerra _is_ libav user, from programmer's perspective ....

https://git.cinelerra-gg.org/git/?p=goodguy/cinelerra.git;a=blob;f=cinelerra-5.1/cinelerra/ffmpeg.C;h=70098ca189c5267b3aeea8bfdb9de8ea19f051ff;hb=HEAD

function int FFStream::seek(int64_t no, double rate)

for some reason I saw timestamps even going negative.

Is it normal, for stream seek, or application must deal with this problem ?


AVRational time_base = st->time_base;
      int64_t tstmp = time_base.num > 0 ? secs * time_base.den/time_base.num : 0;

for some reason stream's time_base was going from 1/25 to 1/30000 after seek, and this confused everything....

> 
> Carl Eugen
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