[FFmpeg-user] -qcomp 0.8 with no effect

[Hugo Wau]

Hello,

I want to bring a video, produced with ffmpeg from an audio stream and a 
huge amount of images, on DVD. Well, the resulting video I got was 4.9 
GB, which is a tiny bit too big, to fit on an average DVD.
I have read about the "-qcomp" modifier. But -qcomp 0.8 has absolutely 
no effect for me.

I don't want to reduce size or rate, but want to increase the 
compression ratio to produce a video from which I'll produce a .iso file 
to burn it on DVD. The time it takes for ffmpeg to produce this video 
doesn't matter much.
How and where can I make the -qcomp modifier effective?

I am using 64-Bit Debian Wheezy,

kind regards
Hugo