Re: Capture (for video) what is displayed on the screen
On Sun, May 09, 2010 at 06:46:20PM +0200, Merciadri Luca wrote:
> ~$ ffmpeg -f x11grab -s cif -i :0.0 /tmp/out.mpg
> FFmpeg version r11872+debian_0.svn20080206-18+lenny1, Copyright (c) 2000-2008 Fabrice Bellard, et al.
> configuration: --enable-gpl --enable-libfaad --enable-pp --enable-swscaler --enable-x11grab --prefix=/usr --enable-libgsm --enable-libtheora --enable-libvorbis --enable-pthreads --disable-strip --enable-libdc1394 --disable-armv5te --disable-armv6 --disable-altivec --disable-vis --enable-shared --disable-static
> libavutil version: 49.6.0
> libavcodec version: 51.50.0
> libavformat version: 52.7.0
> libavdevice version: 52.0.0
> built on Jan 28 2010 20:57:25, gcc: 4.3.2
> [x11grab @ 0xb7f7fec8]device: :0.0 -> display: :0.0 x: 0 y: 0 width: 352 height: 288
> [x11grab @ 0xb7f7fec8]AVParameters don't have video size and/or rate. Use -s and -r.
> :0.0: I/O error occured
> Usually that means that input file is truncated and/or corrupted.
> ==
>
> ==
> $ ffmpeg -f x11grab -s cif -i :0.0+10,20 /tmp/out.mpg
> FFmpeg version r11872+debian_0.svn20080206-18+lenny1, Copyright (c) 2000-2008 Fabrice Bellard, et al.
> configuration: --enable-gpl --enable-libfaad --enable-pp --enable-swscaler --enable-x11grab --prefix=/usr --enable-libgsm --enable-libtheora --enable-libvorbis --enable-pthreads --disable-strip --enable-libdc1394 --disable-armv5te --disable-armv6 --disable-altivec --disable-vis --enable-shared --disable-static
> libavutil version: 49.6.0
> libavcodec version: 51.50.0
> libavformat version: 52.7.0
> libavdevice version: 52.0.0
> built on Jan 28 2010 20:57:25, gcc: 4.3.2
> [x11grab @ 0xb7eb7ec8]device: :0.0+10,20 -> display: :0.0 x: 10 y: 20 width: 352 height: 288
> [x11grab @ 0xb7eb7ec8]AVParameters don't have video size and/or rate. Use -s and -r.
> :0.0+10,20: I/O error occured
> Usually that means that input file is truncated and/or corrupted.
> ==
Simply look at that line:
> [x11grab @ 0xb7eb7ec8]AVParameters don't have video size and/or rate. Use -s and -r.
As far as you have size (-s parameter) specified already, you only need to add
frame rate (-r). Following command should work fine:
$ ffmpeg -f x11grab -s cif -r 24 -i :0.0 /tmp/out.mpg
--
Regards,
Alexander Batischev
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