How do I capture my second monitor using avconv?

Posted by Codemonkey on Super User See other posts from Super User or by Codemonkey
Published on 2014-06-13T14:27:23Z Indexed on 2014/06/13 15:28 UTC
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Filed under:

xorg

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screen-capture

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libav

With this command:

avconv -f x11grab -s 2560x1440 -i :0.0

I can stream video from my main monitor. I also have a second, 1080p monitor on which I do my gaming. I want to stream from that monitor. This doesn't work:

avconv -f x11grab -s 1920x1080 -i :0.1

I assume I have to use -i :0.0 and somehow specify that it should capture 1920x1080 pixels from X position 2560 and Y position 0. My gaming monitor is placed to the right of my main monitor. Unfortunately the man page for avconv is miles long, so I haven't had any luck figuring this out on my own.

I have tried

Using -vf with crop like this:

-vcodec libx264 ... -vf "crop=$IN_WIDTH:$IN_HEIGHT:2560:360"

But that only displayed 1080p video from the top left corner of my main display.

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