convert-mp4-to-flv.sh

#!/bin/bash

item=$1

# A directory or a file must be provided
if [ -z $item ]; then
    echo "You must specify a file or a folder"
    exit 0
elif [ ! -d $item ] && [ ! -f $item ]; then
    echo "The entry you specified is not a folder or a file"
    exit 0
fi

# Processing function definition
function process {
    if [ ! -f $1 ]; then
        echo "Invalid specified file"
        exit 0
    fi

    file=$1
    # file=${file##*/} <- strip path and keep only filename
    donefile=${file:0:${#file}-4}".flv"

    # Wait while any other ffmpeg processes are running
    while [ -n "$(ps -ef | egrep "ffmpeg" | grep -v grep)" ];
    do
        echo -e "\n[$(date +%b\ %d\ %Y:\ %H:%M:%S)]\nFound another instance of ffmpeg running, pausing 5 minutes..."
        sleep 300
    done

    # ffmpeg cmd comvert to flv
    echo "Processing conversion to FLV of $file"
    /usr/local/bin/ffmpeg -i "$file" -ar 44100 -acodec libmp3lame -ab 160K -vcodec flv -qmin 2 -qmax 4 "$donefile"

    if [ -f "$donefile" ] && [ -s "$donefile" ]; then
        rm "$file"
    fi
}

# Ok, process item if it's a file
if [ -f $item ]; then
    process $item
# Or if it's a directory, loop over each file
elif [ -d $item ]; then
    cd $item

    for file in ./* ;
    do
        if [[ $file = *.mp4 ]] ; then
            process $file
        fi
    done
fi

exit 0