MTS to AVI file converter (CLI)

#!/bin/bash
#
# Simple script for converting all MTS videos in directory or in all subdirectories using ffmpeg package
# Author: ceskyDJ
#
# Dependencies: ffmpeg
#
# Prepare:
# - Save to file (ex. /usr/local/bin/MTSToAVI)
# - Set execute permission with chmod +x YourFile (ex. sudo chmod +x /usr/local/bin/MTSToAVI)
#
# Usage:
# - For convert all files in specific directory:
#     * Go to the directory (ex. cd ~/Videos/FromCamera)
#     * Run script from saved file (ex. MTSToAVI)
# - For convert all files in all subdirectories:
#     * Go to the directory contains subdirectories with files
#     * Run script from saved file (ex. MTSToAVI)

# Converts one file
convertFile() {
    # Rename to underscore name (fix for file names with spaces)
    file="$1";
    mv "$file" "${file// /_}";
    file="${file// /_}";

    echo -e "\033[1;33mConverting file: '$1'...\033[0m";
    ffmpeg -i $file -vcodec libxvid -b 18000k -acodec libmp3lame -ac 2 -ab 320k -deinterlace -s 1440x1080 `echo $file | cut -d'.' -f1`.avi;

    # Rename back to original
    mv "$file" "${file//_/ }";

    # Rename new file
    newFile="${file//.MTS/.avi}";
    newFile="${newFile//.mts/.avi}";
    mv "$newFile" "${newFile//_/ }";

    return;
}

# Converts files in selected directory
convertFilesInDirectory() {
    for f in *.MTS; do
        convertFile "$f";
    done

    return;
}

# Converts files in subdirectories of selected directory
convertFilesInSubDirectories() {
    # Move to subdirectory
    cd "$1";
    echo -e "\033[1;35mActual directory: '$1'\033[0m";

    convertFilesInDirectory;

    # Move back to parent directory
    cd "..";

    return;
}

# Search for subdirectories
for d in */; do
    # Subdirectories not found -> convert files in this directory
    if [[ $d = "*/" ]]; then
        convertFilesInDirectory;
    # Subdirectories found -> convert their files
    else
        convertFilesInSubDirectories "$d";
    fi
done

exit