[FFmpeg-user] 2.3 Gazillion

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Jul 12 11:30:33 CEST 2012

Anne at Picaflor Azul <info <at> picaflor-azul.com> writes:

> ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0 -vcodec png pngout.mov

> Stream mapping:
>   Stream #0:0 -> #0:0 (rawvideo -> png)
> Press [q] to stop, [?] for help
> frame=  354 fps= 43 q=0.0 size=   37786kB time=00:00:11.80
> bitrate=26232.6kbits/frame=  820 fps= 34 q=0.0 size=  100452kB
> time=00:00:27.33 bitrate=30106.3kbits/qqqqqqqq^C^C^C
> This (above) didn't seem to want to stop as readily as other commands I
> have used.

Did you try to press "q"?
It works fine here.
If you stop with ^C while encoding mov the resulting file 
will be invalid.

If the quality of the following command (that I believe you tried) 
is fine then I was wrong with my assumption that the rgb->yuv 
conversion is the problem (and you don't have to try png: It 
probably produces big files, it just has the advantage that it is 
truly lossless when encoding x11grab).
$ $ ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0 pngout.mov

Carl Eugen

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