#!/bin/bash
# ===========================================================
#     Script for Generating HTML5 Video Files and Markup
# ===========================================================
#
: '

    Title :

        html5vid.sh


    Usage :

        Pass FFMPEG-supported video files to this script as standard input.
        This scrip will generate html5 video files and markup in a sub directory.


    Requires:

        FFMPEG : libx264, libvorbis, libfaac

';


##################### VARS ######################


outputDir="output" # you may want to update gitignore if you change this


##################### MAIN ######################

# get script dir

cd $(dirname "${BASH_SOURCE[0]}")
directory=$(pwd)

# loop input

for f in "$@"
do

    if [[ $f && -f "$f" ]]; then

        # grab duration data from file and determine hours, minutes, seconds

        duration=$(ffmpeg -i "$f" 2>&1 | grep Duration | awk '{print $2}' | tr -d ,)
        minutes=${duration%:*}
        hours=${minutes%:*}
        minutes=${minutes##*:}
        seconds=${duration##*:}
        seconds=${seconds%.*}
       
        # get file and path info

        filename=$(basename "$f")
        filename=${filename%.*}

        hours=$((hours*3600))
        minutes=$((minutes*60))

        total=$(expr $hours + $minutes + $seconds)

        # make dirs if needed

        if [ ! -d "$directory/$outputDir/$filename" ]; then
            mkdir -p "$directory/$outputDir/$filename"
        fi

        # move to source file's directory and begin process

        cd "$directory/$outputDir/$filename"

        # Thumbnail

        echo "Generating thumbnail"
        ffmpeg -i "$f" -deinterlace -an -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg -y "$directory/$outputDir/$filename/$filename.jpg" 2>&1

        # OGV

        echo "Converting $filename to ogv"
        ffmpeg -i "$f" -c:a libvorbis -ac 2 -b:a 96k -ar 44100 -c:v libvpx -b:v 4500k -y "$directory/$outputDir/$filename/$filename.ogv"
        echo "Finished ogv"

        # WEBM

        echo "Converting $filename to webm"
        ffmpeg -i "$f" -c:a libvorbis -ac 2 -b:a 96k -ar 44100 -c:v libtheora -b:v 4500k -y "$directory/$outputDir/$filename/$filename.webm"
        echo "Finished webm"

        # X264

        echo "Converting $filename to h264"
        ffmpeg -i "$f" -b:a 96k -c:v libx264 -preset slow -level 21 -refs 2 -b:v 4500k -bt 4500k -threads 0 -y "$directory/$outputDir/$filename/$filename.mp4"
        echo "Finished h264"

        # HTML

        echo "Writing HTML..."

        echo "<video controls poster=\"$filename.jpg\" preload>" > "$directory/$outputDir/$filename/$filename.html"
        echo "  <source type=\"video/ogg\" src=\"$filename.ogv\">" >> "$directory/$outputDir/$filename/$filename.html"
        echo "  <source type=\"video/webm\" src=\"$filename.webm\">" >> "$directory/$outputDir/$filename/$filename.html"
        echo "  <source type=\"video/mp4\" src=\"$filename.mp4\">" >> "$directory/$outputDir/$filename/$filename.html"
        echo "  Sorry, your browser does not support HTML5 video" >> "$directory/$outputDir/$filename/$filename.html"
        echo "</video>" > "$directory/$outputDir/$filename/$filename.html"

        echo "All Done!"
    else
        echo "Error with input.  Please check what you are passing to this script."
    fi

done