[FFmpeg-user] ffmpeg stuck grabbing the screen

Carl Eugen Hoyos ceffmpeg at gmail.com
Mon Feb 27 12:08:56 EET 2017

2017-02-27 11:04 GMT+01:00 Martin Ždila <m.zdila at gmail.com>:

> We have ubuntu xenial installed where we run Xvfb and use ffmpeg to grab
> screen from it. On the one machine it unfortunately gets stuck on 12th
> frame, unless we provide -r parameter:
> ffmpeg -y -loglevel debug -video_size 320x340 -framerate 25 -f x11grab -i
> :0.0+100,200 output.mp4
> ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers

Please test current FFmpeg git head.
What happens if you use "-f null -" instead of output.mp4: Does it also hang?

If x11grab for whatever reason provides vfr video, mov is not the ideal
output format. (It shouldn't though.)

Carl Eugen

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