Re: [transcode-users] Question about video preprocessing (contrast)and transcode

[Phil Ehrens <phil@xxxxxxxx>]

Marlon Brandão de Sousa wrote:
> 
> Ok, now I know my video is mjpg and audio is pcm. So what I want is to
> generate another .avi file, with the same size, with mjpg and audio
> pcm, with the same size, etc ... with contrast and brightness changed.
> >From this point I am totally confused and have no idea about how to do
> thisprocess. I've provided all details I could and I've tryed google
> too, but I am confused, really so I decided to ask here. My machine is
> a slackware 10.2 p4 1.8 ghz.

You can use Transcode's mplayer import module and use mplayer's eq2
filter to change the gamma, contrast, brightness, saturation, and
color balance. Then you can use the ffmpeg export module for the
output. The video and audio codecs you are using are rather inefficient,
but if that's what you want they are not a problem. Just a hunch,
but I'll bet you have some terrible interlacing artifacts in your
source.