Wirtualna kamera internetowa Linux
sudo modprobe -r v4l2loopback
sudo modprobe v4l2loopback devices=1 video_nr=21 exclusive_caps=1 card_label="Virtual Webcam"
sudo modprobe v4l2loopback exclusive_caps=1
ffmpeg -re -stream_loop -1 -i Downloads/big_buck_bunny_720p_1mb.mp4 -map 0:v -f v4l2 /dev/video21
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