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Old 06-20-2012, 10:58 AM   #1
Registered: Apr 2009
Location: Boston MA
Distribution: CentOS 6.2 x86_64 GNU/Linux
Posts: 59

Rep: Reputation: 19
Using ffmpeg to grab movie of a part of my screen and not the whole screen

Hi there,

I'm trying to capture a part of my screen as movie. From other sites I've found this:
ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq output.mpg -t 20
and it nicely captures a movie of my whole screen for 20 seconds, but I now want to restict the movie to only capture a part of the screen.

Does anybody have experience doing this with ffmpeg?

I have already played with the flags -padleft (which will give a black area on the left in the output and does not "restrict" the movie to capture a smaller area), and -cropleft ("error cropping picture").

I have been searching for a linux version of Capture Me that I use on my mac. Capture Me has a nice gui with a box that I can simply lay over a part of my screen that will then be recorded.


Edit: I'm currently working on linux CentOS 6.2 RedHat

Last edited by Mike_V; 06-20-2012 at 12:46 PM.
Old 06-20-2012, 04:34 PM   #2
Registered: Apr 2003
Posts: 763

Rep: Reputation: 87
I don't use centos so your on your own with this. I use recordmydesktop with ubuntu and it works well.

From here:

'How to install recordmydesktop on centos 6.2 Download the source tar.gz from
Open terminal and cd into the directory which contains the tar.gz file
execute "tar -xvzf <filename>.tar.gz". This will create a new folder.
ecexute "cd <new folder name>"'

yum install zlib-devel
yum install libICE-devel
yum install libSM-devel
yum install libX11-devel
yum install libX11-devel
yum install libXext-devel
yum install libXfixes-devel
yum install libXdamage-devel
yum install libvorbis-devel
yum install libtheora-devel

make install
I do have some ffmpeg scriptlets somewhere on another box that will do this but recordmydesktop is much easier for just occasional use. I have a bad habit of forgetting how the heck I did something if I don't use it often. :-)

Last edited by mjolnir; 06-20-2012 at 04:44 PM.


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