I'm trying to pass Xvfb buffor directly to ffmpeg inside Docker. This is approach give me really big performance benefits.
This is how I'm doing it:
Xvfb write the screen output:
[code]sudo Xvfb $DISPLAY -ac -screen 0 1680x900x24 -fbdir /tmp/screen/test.xwd > /dev/null 2>&1 &[\code]
ffmpeg read command:
Code:ffmpeg -hide_banner -loglevel debug -loop 1 ' \ '-re -i /tmp/screen/test.xwd ' \ '-f alsa -i default -strict -2 -ac 2 -preset ultrafast -f ' \ '-c:av copy ' \ 'output_file.mkv'
The problem is: ffmpeg missed many frames and the video should be 3 minutes long, but is half of expected time (video accelerates at some point).
On following video you can see the problem: https://drive.google.com/file/d/1HWjEqrtPfZCRSndxpUpY1iXsrfMNWdp7/view
I guess there is a problem with ffmpeg command and it requires some tweaks, but no idea how to configure it properly.
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