[FFmpeg-devel] [PATCH] H.264 I-frames with SEI are also key frames

madshi dear
Fri Mar 6 12:04:25 CET 2009

> Actually--wait a minute here.  Any frame--period--that can be seeked
> to--must do an *effective* reference list refresh.  This can be done
> through MMCO or, in the simplest case, having a stream with just 1
> reference frame and then having an I-frame.  Wouldn't the proper
> solution be to "detect" seekable frames--even those that aren't
> signaled as such--and allow seeking to them?
> Dark Shikari

I've never heard the term "MMCO" yet. So your reply is a bit
over the top of my head. But if it's possible somehow to detect
seekable frames simply by parsing the bitstream, then of course
that would be the ultimate solution.

Would you mind going into a bit more detail on how that would
be done technically? This is something I could use in my own (non
libav related) projects, too. So I find this quite interesting.


Regards, madshi.

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