[SATLUG] ffmpeg screen capture

Don Davis dondavis at reglue.org
Tue Dec 3 14:14:04 CST 2013


Awesome. Good to know. Thank you for sharing.  I love ffmpeg. (I thought
they weren't calling it that anymore?)



On Tue, Dec 3, 2013 at 8:53 AM, Borries Demeler <demeler at biochem.uthscsa.edu
> wrote:

> So, after much looking around, testing, compiling and upgrading,
> I finally found an excellent solution that seems to work better than
> any other: ffmpeg. The latest version (2.1) has support for x11grab,
> and hence can record directly from the X11 screen.  Needless to say,
> it produces excellent quality video without frameloss or compression,
> and supports virtually any format I could ever need. The best part is
> that audio is properly recorded alongside with the video and multiplexed
> with the video on the fly for perfect synchronization for my voice-over
> needs. Oh, and ffmpeg is multithreaded in case a single core is not
> fast enough. Here is an example commandline that works just fine:
>
> ffmpeg -video_size 800x600 -framerate 25 -f x11grab -i :0.0 -f alsa -ac 2
> -i hw:0,0 output.mkv
>
> The KDE 4 plasma desktop supports a mouse cursor for magnification in
> the vicinity of the mouse cursor, this way I can scale the video down
> and the important part is still perfectly readable.
>
> All set now to make my instructional videos :-)
>
> -b.


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