[FFmpeg-user] fast video codec for screen casting

[dE .]

On 01/05/12 06:43, Carl Eugen Hoyos wrote:
> dE .<de.techno<at>  gmail.com>  writes:
>
>> ffmpeg -f alsa -i default -f null -s 1280x800 -i :0.0 -qscale 2 -threads
>> 1 -b 20000k -vcodec mpeg1video -ar 44100 -ac 2.0 -acodec pcm_s16le out.avi
> ffmpeg -f x11grab -s 1280x800 -i :0.0 -f null -
>
> Please cut your quotes, Carl Eugen

30 FPS

frame=  529 fps= 30 q=2.0 size=       0kB time=00:00:17.61 bitrate=   
0.0kbits/s dup=338 drop=0 frame=  544 fps= 30 q=2.0 size=       0kB 
time=00:00:18.11 bitrate=   0.0kbits/s dup=345 drop=0 frame=  560 fps= 
30 q=2.0 size=       0kB time=00:00:18.65 bitrate=   0.0kbits/s dup=359 
drop=0 frame=  576 fps= 30 q=2.0 size=       0kB time=00:00:19.18 
bitrate=   0.0kbits/s dup=372 drop=0 frame=  594 fps= 30 q=2.0 
size=       0kB time=00:00:19.78 bitrate=   0.0kbits/s dup=383 drop=0 
frame=  610 fps= 30 q=2.0 size=       0kB time=00:00:20.32 bitrate=   
0.0kbits/s dup=392 drop=0 frame=  625 fps= 30 q=2.0 size=       0kB 
time=00:00:20.82 bitrate=   0.0kbits/s dup=400 drop=0

Using ffmpeg -f alsa -i default -f x11grab -s 1280x800 -i :0.0 -f null 
-qscale 2 -threads 1 -b 20000k -vcodec mpeg1video -ar 44100 -ac 2.0 
-acodec pcm_s16le out.avi

As you know there's no output. I also tried ffmpeg -f x11grab -s 
1280x800 -i :0.0 -f null -qscale 2 -threads 1 -b 20000k -vcodec 
mpeg1video -an out.avi