[MPlayer-users] Corruption after using -ovc copy

[Reimar Döffinger]

On Thu, Mar 13, 2008 at 11:05:22AM +0100, Haakon Riiser wrote:
> When cutting parts of a video stream using 
> 
>   -ss <pos> -endpos <x> -ovc copy
> 
> I often get corruption, as if some P- or B-frames were played
> without the proper reference frames in the buffer.  I would expect
> this if -ss allowed me to seek to an arbitrary frame in the stream,
> but that's not the case at all.  The positions that are seekable
> using -ss are often far apart, so I'm guessing -ss only seeks to
> I-frames.
> 
> If that's the case, why doesn't -ovc copy produce perfect results
> every time?

You will have to use -mc 0 -noskip or something like that, without those
it's no wonder it looks like some reference frames are missing, because
they probably are...