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I'm trying to use ffmpeg to record my whole screen (1366x768), but if I set the video size above a certain size, I get a segfault. As can be seen in the output, I compiled from source less than 1 hour before posting this question.
1366x744 (works perfectly well)
λ ./ffmpeg -f x11grab -r 25 -s 1366x744 -i :0.0+0,24 -vcodec libx264 -threads 0 screen.mkv
ffmpeg version 2.5.1 Copyright (c) 2000-2014 the FFmpeg developers
built on Dec 18 2014 20:32:54 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libxvid --enable-x11grab --enable-libvorbis
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[x11grab @ 0x1ab6f20] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0.0+0,24':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 1366x744, 25 fps, 25 tbr, 1000k tbn, 25 tbc
File 'screen.mkv' already exists. Overwrite ? [y/N] n
Not overwriting - exiting
1366x745 (segfault)
λ ./ffmpeg -f x11grab -r 25 -s 1366x745 -i :0.0+0,24 -vcodec libx264 -threads 0 screen.mkv
ffmpeg version 2.5.1 Copyright (c) 2000-2014 the FFmpeg developers
built on Dec 18 2014 20:32:54 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libxvid --enable-x11grab --enable-libvorbis
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[1] 31332 segmentation fault (core dumped) ./ffmpeg -f x11grab -r 25 -s 1366x745 -i :0.0+0,24 -vcodec libx264 -threads 0
Is there something I'm missing here?
What's the output of
xwininfo -root | awk '/-geo/{print $2}'
? – llogan – 2014-12-19T02:03:09.847@LordNeckbeard
1366x768+0+0
– Nate Mara – 2014-12-19T02:04:30.760