ffmpeg batch conversion

ffmpeg_batch_examples.txt

# Convert 4:3 aspect ratio files to 16:9 with black bars. For each m4v file convert and encode using crf 18.
for i in *.m4v; do ffmpeg -i "$i" -vf "scale=960x720,setsar=1,pad=1280:720:160:0" -crf 18 "${i%.m4v}.mp4"; done

# For normal conversion to mp4.
for i in *.m4v; do ffmpeg -i "$i" "${i%.m4v}.mp4"; done

# For mov to mp4 conversion with some compression.
for i in *.mov; do ffmpeg -i "$i" -crf 23 -vcodec libx264 -acodec aac "${i%.mov}.mp4"; done