junmakii-ffmpeg-convert-to-light-video.sh

#!/bin/bash

#set -e

FFMPEG=$(which ffmpeg)
#CODEC=libvpx
CODEC=libx264
PRESET=ultrafast
#ACODEC=libvorbis # for webm
#PRESET=fast
#CRF=63 # For libvpx
#CRF=51 # For libx264
CRF=30

for i in $1/*; do
    file_name=$(basename "$i")
    output="$2/${file_name}.mp4"
    echo "INFO: ${output}"
    
    if [ -f "${i}" ] && [ ! -f "${output}" ]; then
        ${FFMPEG} -i "$i"  -c:v ${CODEC} -crf ${CRF} -preset ${PRESET} -b:v 1M -codec:a aac -b:a 128k -strict -2 -vf scale=320:-1 "${output}"
    fi
done

exit 0