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

Robert Krüger krueger at lesspain.de
Mon Oct 21 12:53:49 CEST 2013

On Mon, Oct 21, 2013 at 12:13 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> 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
> committed).

Even better. Which commit are you talking about?

> Please provide the sample, Carl Eugen

I'll be more than happy to do that. How do you want me to do it? Open
a ticket (if so, what would be an appropriate topic/title in your
opinion?) or by some other means?

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