Screen

wf-recorder ​

Used to record wlroots based compositors.

Installed separately, use this command for best software encoding:

wf-recorder -c libx264rgb -p crf=0

x11grab ​

Enable the X11 video input device with -f x11grab.

Set the desired -framerate and -video_size, and as input file set your display number and screen number (usually :0.0).

ffmpeg -f x11grab -framerate 30 -video_size 1366x768 -i :0.0 out.mp4

Output ​

libx264rgb seems to be the best encoder in terms of speed. H.265 is slower and not suited for screen recording.

You may want to add -thread_queue_size and -probesize to the command to avoid some warnings.

The command to record both audio and screen smoothly with lossless quality should look like this:

ffmpeg -f pulse -thread_queue_size 512 -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor -f x11grab -framerate 60 -probesize 16M -thread_queue_size 512 -video_size 1366x768 -i :0.0 -vcodec libx264rgb -crf 0 -preset ultrafast records/out4.mp4