[FFmpeg-devel] strange seek problem matroska and avcodec_flush_buffers
donmoir at comcast.net
Sun Feb 19 18:03:36 CET 2012
Thanks for the explaination.
> On Sun, Feb 19, 2012 at 04:42:50AM -0500, Don Moir wrote:
>> The strange thing is, if I don't call avcodec_flush_buffers, the damn
>> thing works almost perfect for me. Very clean actually, no distortion but
>> a little frame flicker.
> That's probably just because the frames before and after are quite
> If you really wanted to you probably could hack error concealment to
> do something better than substituting a plain gray for missing
> references (in this and probably many other cases, just a darker
> gray seems like it would look nicer).
The light gray does stick out too much and I also think a darker gray would
> Now coming back to MPlayer just showing distortion:
> I extremely hate when players rather show nothing than something
> that might have minimal corruption.
> Thus MPlayer instructs FFmpeg to _not_ discard any initial
> non-keyframes (or in this case frames before the intra refresh
> interval passed) by setting CODEC_FLAG2_SHOW_ALL.
By setting CODEC_FLAG2_SHOW_ALL I now see the same behavior as MPlayer
although since my post seek process (exact timestamp) cleans it up abit it
looks a little better.
The thing is, the "bad_seek_matroska_strange" file is a worst case of this
of the files I have. Some other files I have, have a very slight indication
of this. Maybe something like 1/8 to 1/4 of a second. In these cases,
settting CODEC_FLAG2_SHOW_ALL is worse because you will see distortion where
previously it was clean. While seeing the distortion is helpful in some
cases, I have more files that are effected negatively by it.
I suppose this is the end of this outside of hacking error concealment ?
Like I don't know if there is a way to make a better conscious decision on
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