[MEncoder-users] Urgent problem mpeg4

[Grozdan Nikolov]

On Wednesday 01 August 2007 13:47, Ivan Arcos wrote:
> Before, I use this command
> mencoder origen -oac copy -ovc lavc -lavcopts vcodec=mpeg4:keyint=25 -ofps
> 25 -of avi -o destino
> but the movie haved low quality
>
> Later I use
>
> mencoder origen -aid 128 -oac copy -ovc lavc -lavcopts
> mpeg4:vqscale=3:vhq:v4mv:trell:autoaspect  -ofps 25 -o destino
> but the process is very slow and the resultant file is very big.

mencoder origen -aid 128 -oac copy -ovc lavc -lavcopts
mpeg4:vbitrate=1200:vhq:v4mv:trell:autoaspect  -ofps 25025/1001 -o destino

you can also do a 2-pass encoding with a slightly lower bitrate. Usually 
2-pass results in better bitrate distribution. You can use the turbo option 
for the first pass to speed it up... don't use turbo for the second one, so 
you're command line will be something like

pass 1

mencoder origen -aid 128 -oac copy -ovc lavc -lavcopts
mpeg4:vbitrate=1200:vpass=1:turbo:vhq:v4mv:trell:autoaspect  -ofps 
25025/1001 -o /dev/null

pass 2

mencoder origen -aid 128 -oac copy -ovc lavc -lavcopts
mpeg4:vbitrate=1200:vpass=2:vhq:v4mv:trell:autoaspect  -ofps 25025/1001 -o 
destino


>
> Anything in the middle?
>
> I have to deliver the project tomorrow. I am grateful for any help
> The problem is that the image watchs with a lot of pixels
> Thank you
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