MKV to MP4 (Docker, FFMpeg, AVConv)

convert_video.sh

#!/usr/bin/env bash

# Convert MKV to MP4
# Uses Docker FFMpeg, FFMpeg or AVConv.
#
# Usage:
# ./convert_video.sh
# ./convert_video.sh /path/to/videos
#
# Notes:
# Statistics: -stats, -nostats, -loglevel 0
# Skip Subtitles: -sn
# Copy Subtitles: -c:s mov_text
#
# Links:
# https://askubuntu.com/questions/396883/how-to-simply-convert-video-files-i-e-mkv-to-mp4

convert_video() {
    local video="$1"
    local opts="-nostats -loglevel 0 -c:v copy -c:a copy -c:s mov_text -movflags +faststart"

    if [ -e "${video%.*}.mp4" ]; then
        echo "Skipping '$(basename "$video")'"
        return
    fi

    echo "Processing '$(basename "$video")'"

    if which docker > /dev/null; then
        local path=$(dirname "$video")
        local file=$(basename "$video")

        docker run --rm -v="$path:/tmp/workdir" -w="/tmp/workdir" jrottenberg/ffmpeg -i "${file}" $opts "${file%.*}.mp4"
    elif which ffmpeg > /dev/null; then
        ffmpeg -i "${video}" $opts "${video%.*}.mp4"
    elif which avconv > /dev/null; then
        avconv -i "${video}" $opts "${video%.*}.mp4"
    else
        echo "Could not locate ffmpeg or avconv"
        exit 1
    fi

    if [ "$?" -ne "0" ]; then
        echo "Failed to convert video '$video'"
        exit 1
    fi
}

VIDEO_PATH=${1:-.}

if [ ! -d "$VIDEO_PATH" ]; then
    echo "Directory '$VIDEO_PATH' does not exist"
    exit 1
fi

find "$VIDEO_PATH" \
    -type f \
    -name "*.mkv" \
    -not -iwholename "*.AppleDouble*" \
    -not -iwholename "*._*" \
    | while read file; do convert_video "$file"; done