This script recurses through the file hierarchy, converting .MOD video files into .mp4 files with ffmpeg.

convert.sh

#!/bin/bash

# This script recurses through the file heirarchy, converting .MOD video files into .mp4 files with ffmpeg.

# usage: cd into the directory that you want to perform this script, then run "./convert.sh ."
MODext=MOD
MP4ext=mp4

# walk through a directory recusively,
recurse_dir() {
    for i in "$1"/*; do
        if [ -d "$i" ]; then
            echo -e "searching dir: $i...\n"
            recurse_dir "$i"
        elif [ -f "$i" ]; then
            if [[ ${i: -4} == ".MOD" ]]; then
                dest=${i%.$MODext}.$MP4ext
                echo -e "\nconverting file: $i..."
                # feel free to tweak ffmpeg parameters below according to your needs
                `ffmpeg -i "$i" -vcodec mpeg4 -b:v 2800k -acodec aac -ab 384k -ar 48000 "$dest" -n -nostdin`
                RC=$? # get the return code from ffmpeg
                if [ "${RC}" -ne "0" ]; then
                    # Do something to handle the error.
                    echo -e "ERROR code from ffmpeg: $RC\n"
                else
                    # Everything was ok.
                    echo -e "removing file: $i...\n"
                    rm "$i"
                fi
            fi
        fi
    done
}


# try get path from param
path=""
if [ -d "$1" ]; then
    path=$1;
else
    path="/tmp"
fi

echo -e "base path: $path"
recurse_dir $path