Split video file into audio / video indep. components

extract_audio_video.sh

#!/usr/bin/env bash

if [[ $# -lt 2 ]]; then
        echo "Input Flist and Output dir"
        exit
fi

module load parallel
module load ffmpeg

scp_file=$1
output_dir=$2
scale=${3:-256}
fps=${4:-30}
audio_outputdir=${output_dir}"/audio"
video_outputdir=${output_dir}"/video"
mkdir -p ${audio_outputdir} ${video_outputdir}

export audio_outputdir video_outputdir scale fps

function extract() {
        scp_line=$1
        path=$(echo $scp_line | awk '{print $2}')
        fname=$(basename $path ".mp4")
        ffmpeg -loglevel quiet -i $path -vn -acodec pcm_s16le -ac 1 -y $audio_outputdir/$fname".wav"                                                                                         
        ffmpeg -loglevel quiet -i $path -vf "scale=${scale}:${scale},fps=${fps}" -an -y $video_outputdir/$fname".mp4"                                                                        
}

export -f extract

cat $scp_file | parallel --eta extract