[FFmpeg-user] Troubleshooting: ffmeg screencasting commands

Carl Eugen Hoyos cehoyos at ag.or.at
Sat Jan 5 23:03:07 CET 2013

maujhsn <103730258b <at> gmail.com> writes:

> ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1024x768 -i :0.0 -c:a
> pcm_s16le -ar 11025 -c:v libx264 -preset ultrafast -threads 0
> ~/Desktop/desk_A.mkv
> This is  a very Good command...so why this output?

I did not find any information in your mail what 
is wrong with your output file, but please 
add -pix_fmt yuv420p to your command line if 
the problem is that FFmpeg (and FFmpeg-based 
applications) play the output file fine but some 
proprietary applications do not.

Please do not top-post here, it is considered rude.

Carl Eugen

More information about the ffmpeg-user mailing list