Simple HTML5 video encoding bash script for OS X (Easily ported to Linux)

html5_video_convert.sh

#!/bin/bash
set -e

# IMPORTANT! First install ffmpeg with encoders enabled, i.e. like this:
# brew install ffmpeg --with-libvpx --with-libvorbis --with-theora

# Will not re-encode files, if output file exists.
# Quality settings are configured in encoders' command line parameters below, sorry about that.

if [ -z "$1" ]; then
    echo "ERROR: You need to set the original filename as the first parameter!"
    exit 1
fi

if [ ! -f "$1" ]; then
    echo "ERROR: Input file not found!"
    exit 1
fi

if [ -z "$2" ]; then
    echo "ERROR: You need to set the resolution as the second parameter, for example: 1280x720"
    exit 1
fi

INPUT="$1"
RESOLUTION="$2"
OUTPUT=${INPUT%.*}

echo "Trying to convert $INPUT ($RESOLUTION)"
echo ""

# -- h264
if [ ! -f "$OUTPUT"_"$RESOLUTION"_converted.mp4 ]; then
    echo "Converting to h246 (.mp4) ... "
    ffmpeg -loglevel warning -hide_banner -i "$INPUT" -an -c:v libx264 -profile:v high -preset slow -b:v 1000k -maxrate 2000k -bufsize 1000k -s "$RESOLUTION" "$OUTPUT"_"$RESOLUTION"_converted.mp4

    echo " - done."
else
    echo "h264 (.mp4) already converted."
fi
echo ""

# -- WebM
if [ ! -f "$OUTPUT"_"$RESOLUTION"_converted.webm ]; then
    echo "Converting to WebM (.webm) ..."
    ffmpeg -loglevel warning -hide_banner -i "$INPUT" -an -c:v libvpx -quality good -cpu-used 0 -qmin 0 -qmax 40 -b:v 1000k -crf 6 -s "$RESOLUTION" "$OUTPUT"_"$RESOLUTION"_converted.webm
    echo " - done."
else
    echo "WebM (.webm) already converted."
fi
echo ""

# -- Theora/Vorbis
if [ ! -f "$OUTPUT"_"$RESOLUTION"_converted.ogv ]; then
    echo "Converting to Theora/Vorbis (.ogv) ..."
    ffmpeg -loglevel warning -hide_banner -i "$INPUT" -an -c:v libtheora -q:v 6 -b:v 1000k -s "$RESOLUTION" "$OUTPUT"_"$RESOLUTION"_converted.ogv
    echo " - done."
else
    echo "Theora/Vorbis (.ogv) already converted."
fi
    echo ""

say "Encoding complete"