ffmpeg /dev/video0
ffmpeg -f v4l2 -list_formats all -i /dev/video0
ffplay -f v4l2 -list_formats all /dev/video0
arecord -l
cat /proc/asound/cards
hw:1,0
lsusb -v | grep 'tSamFreq'
arecord -f S16_LE -c 2 -D "hw:1,0" a-001
ffplay -f alsa -i hw:1,0
ffplay -f v4l2 -video_size 1920x1080 -framerate 30 /dev/video0
ffplay -f v4l2 -video_size 1280x720 -framerate 30 /dev/video0
ffplay -f v4l2 -video_size 1366x768 -framerate 30 /dev/video0
ffmpeg -f v4l2 -framerate 30 -video_size 1920x1080 -c:v mjpeg -i /dev/video0 -c:v copy output.mov
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -c:v copy output.mkv
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c:v copy -c:a copy output.mkv
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c copy output.mkv
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c copy -f rawvideo - | ffplay -
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c copy -f avi - | ffplay -
ffplay -f v4l2 -framerate 30 /dev/video0
vlc v4l2:///dev/video0 --input-slave=alsa://hw1,0 --alsa-samplerate=96000
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