notes/cmd/ffmpeg.md

• 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
• audio and picture to video ffmpeg -loop 1 -i louie3.jpg -i output_audio.mp3 -shortest -c:v libx264 -crf 23 -c:a aac -b:a 128k -vf "scale=720:720,format=yuv420p" out2.mp4