[MPlayer-users] bugs when displaying album art for mp3, m4a files

[Reimar Döffinger]

On Sat, Aug 04, 2012 at 05:10:17PM +0000, Carl Eugen Hoyos wrote:
> Reimar Döffinger <Reimar.Doeffinger <at> gmx.de> writes:
> 
> > Seeking is a FFmpeg bug, it cannot handle seeking in streams that have
> > significantly longer audio than video, it will always seek to a video
> > keyframe (which in this specific sample means it will always seek to 0
> > no matter what is requested).
> 
> ffplay seeked fine in the mp3 sample when I tested today 
> (the other sample comes from a bug report about this 
> behaviour), does it fail for you?

I only tested the other one. I guess for the mp3 the AV_NOPTS_VALUE
makes it being accepted no matter where you seek to.
But you could consider the mp3 working as much a bug in itself.
Now for why MPlayer can't seek: The problem is that in an attempt
to get the next video frame MPlayer demuxes the whole audio of the file.
Thus only seeking backwards works, seeking forwards will exit (this
is due to seeking being relative to the demux position instead of the
current playback position).