[Libav-user] Criteria for h.264 key-frame detection

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Oct 22 15:06:11 CEST 2013

Robert Krüger <krueger at ...> writes:

> >> > Afaict, the 27th frame is not shown, ffmpeg "thinks"
> >> > that it is no random access point.
> >>
> >> What do you mean by "not shown"?
> >
> > It is not decoded unless flags2 showall is used because
> > FFmpeg thinks the 27th frame is not a random access
> > point.

> You are probably talking about an ffmpeg command line you 
> used for testing. I am only guessing you made ffmpeg seek 
> or something like that?

Which command does decode the 27th frame for you?
It is not decoded here unless I use -flags2 showall.

Carl Eugen

More information about the Libav-user mailing list