[MPlayer-users] mencoder and -vop expand

[Jukka Tastula]

On Monday 29 July 2002 20:52, Kiko Piris wrote:

> My problem is with mencoder, I've tried the following :
>
> mencoder input.avi -oac copy -ovc copy -vop expand=704:576 -v > output.log
>
> And the generated test.avi continues to have the same format than the
> original.

The problem is obvious: -ovc copy only copies the frames as they are in the 
input stream, it can't change them in any way. That would require 
recompressing the stream -> you lose quality.

Instead if your goal is to encode the stream to svcd compliant format, use 
mencvcd with -vop expand in the mplayer options part. Theres absolutely no 
need to have mencoder anywhere in the process as it can't output mpeg2.