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

Carl Eugen Hoyos cehoyos at ag.or.at
Mon Oct 21 12:13:14 CEST 2013

Robert Krüger <krueger at ...> writes:

> In case of the files I am talking about here, there are no recovery
> point SEIs after the first frame so libavformat/avcodec is probably
> doing everything correctly, too. Since I think I know that these
> streams in fact do have random access points, I will probably have to
> parse the h264 metadata myself and apply some heuristics in my
> application but filing a ticket does not seem to make sense as it does
> not appear to be a defect and I don't think anyone would have an
> interest to work on such heuristics or further investigation, how
> random access points can be found in such a stream (if they exist,
> which I have yet to prove).

I don't know how you come to the conclusion that (both 
library and application) users wouldn't want the 
heuristic (last week something probably related was 
Please provide the sample, Carl Eugen

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