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+* disassemble into frames `ffmpeg -i lcd.mp4 frames/frame%04d.jpg`
+* assemble from frames `ffmpeg -i frames_out/frame%04d.jpg -r 29.97 lcd_out.mp4  `
+* extract audio `ffmpeg -i lcd.mkv -vn -acodec copy lcd.mp4`
+* merge audio and video `ffmpeg -i lcd_out.mp4 -i lcd.mp4 -acodec copy  out.mp4`