Resize and re-encode a video to something appropriate for a GH upload or other small file sharing.

mpeginate

set -x
set -e

BIN_NAME=$0
function usage {
    cat <<EOS
Usage:
    $BIN_NAME <video file> [width_scale]
Example:
    $BIN_NAME foo.mov
EOS
}

INPUT_FILE=$1
if [ -z "${INPUT_FILE}" ]
then
    usage
    exit 1
fi

# default output resolution
DEFAULT_WIDTH_SCALE=640
WIDTH_ARG=$2
WIDTH_SCALE="${WIDTH_ARG:-$DEFAULT_WIDTH_SCALE}"
# WIDTH_SCALE=-2
# WIDTH_SCALE=420
#HEIGHT_SCALE=480
HEIGHT_SCALE=-2



OUTPUT_FILE="${INPUT_FILE}.mp4"
ffmpeg -i "${INPUT_FILE}" -vf scale="${WIDTH_SCALE}:${HEIGHT_SCALE}" -qscale:v 0 "${OUTPUT_FILE}"