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baskeboler/dub.fish

Created June 13, 2019 21:02
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record webcam lip-syncing an mp3 played with cvlc and then mux the recorded audio with the selected audio stream
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dub.fish
#!/usr/bin/env fish
set AUDIO $argv[1]
echo input: $AUDIO
rm /tmp/salida.mpg
set BIRTH_T (date +%s%N)
cvlc $AUDIO &
set START_T (date +%s%N)
set DIFF_T (math $START_T - $BIRTH_T)
echo $DIFF_T > DIFF
# I am assuming the webcam is at /dev/video0
ffmpeg -f v4l2 -framerate 25 -s 640x480 -i /dev/video0 /tmp/salida.mpg
ffmpeg -y -i /tmp/salida.mpg -ss 0:0:1 -i $AUDIO -shortest -f mp4 -pass 1 -passlogfile /tmp/passlogfile -vcodec mpeg4 -r 25 -b:v 512K -s 640x480 -an /dev/null
ffmpeg -y -i /tmp/salida.mpg -ss 0:0:1 -i $AUDIO -shortest -f mp4 -pass 2 -passlogfile /tmp/passlogfile -vcodec mpeg4 -r 25 -b:v 512K -s 640x480 -acodec libmp3lame -ar 44100 -b:a 96K salida.mp4
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