Video Compressor

ffmpeg_resize_reduce_audio.sh

# From:  https://stackoverflow.com/questions/29082422/ffmpeg-video-compression-specific-file-size

# Here's a way to do it automatically with a bash script
# Just call like ./script.sh file.mp4 15 for 15mB
# Audio Bitrate is 64k
# TODO: Write a simple wrapper, make audio variable / add controls

bitrate="$(awk "BEGIN {print int($2 * 1024 * 1024 * 8 / $(ffprobe \
    -v error \
    -show_entries format=duration \
    -of default=noprint_wrappers=1:nokey=1 \
    "$1" \
) / 1000)}")k"
ffmpeg \
    -y \
    -i "$1" \
    -c:v libx264 \
    -preset medium \
    -b:v $bitrate \
    -b:a 64k \
    -r 12 \
    -pass 1 \
    -f mp4 \
    /dev/null \
&& \
ffmpeg \
    -i "$1" \
    -c:v libx264 \
    -preset medium \
    -b:v $bitrate \
    -b:a 64k \
    -r 12 \
    -pass 2 \
    "${1%.*}-$2mB.mp4"