[FFmpeg-user] -qcomp 0.8 with no effect

[Hugo Wau]

Hello Carl Eugen Hoyos,

On 22.09.2012 20:51, Carl Eugen Hoyos wrote:
> Hugo Wau<hugowau<at>  gmx.net>  writes:
>
>    
>> 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
>>      
> Apart from the fact that I don't see what else could
> help you except "reduce size":
> I am not sure what you mean with "-qcomp". Please
> provide your command line together with complete, uncut
> console output.
>
> Carl Eugen
>
> _____________
my command line looks like this:

ffmpeg -i myaudio4video.mp3 -f image2 -r 25 -i frames720/frm%06d.jpg 
-sameq -target pal-dvd -aspect 16:9 -acodec mp2 -ab 192k -qcomp 0.9 -y 
myvideo.mpg

this works for me and it produces a fine mp2 video, which fits the 
screen-size standard for a DVD. But the resulting video file is just a 
bit too big for a DVD. (I don't have the output on this computer.)

I am aware that -qcomp 0.9 could probably be in a conflict with -sameq 
(if -qcomp would work at all).
According to the manpage are there also options like -fs to specify a 
file size, which I have not tested yet.
I will not change the screen-size, nor will I reduce audio quality. Just 
a bit more compression, a bit less video quality - if necessary - to 
make the resulting video fit the media. (4.9GB -->> 4.5GB)

with kind regards
Hugo