ffmpeg snippets

gif2mp4.sh

#!/bin/bash

function error_exit {
    echo "$1" >&2   ## Send message to stderr. Exclude >&2 if you don't want it that way.
    exit "${2:-1}"  ## Return a code specified by $2 or 1 by default.
}

if [ $# -eq 0 ]; then
    error_exit "No input filepath given"
fi

if [ ! -f "$1" ]; then
    error_exit "Input file does not exist"
fi

if [[ $(file --mime-type -b "$1") != image/gif ]]; then
	error_exit "Input file is not a gif image"
fi

INPUT=$1

if [ $# -eq 2 ]; then
	OUTPUT=$2
else
	OUTPUT="$INPUT.mp4"
fi

echo "convert [$INPUT] to [$OUTPUT]"

ffmpeg -f gif -i $INPUT -pix_fmt yuv420p -y $OUTPUT

mp4split.sh

#!/bin/bash

function error_exit {
    echo "$1" >&2   ## Send message to stderr. Exclude >&2 if you don't want it that way.
    exit "${2:-1}"  ## Return a code specified by $2 or 1 by default.
}

if [ $# -eq 0 ]; then
    error_exit "No input filepath given"
fi

if [ ! -f "$1" ]; then
    error_exit "Input file does not exist"
fi

if [[ $(file --mime-type -b "$1") != video/mp4 ]]; then
	error_exit "Input file is not a mp4 video"
fi

INPUT=$1
LENGTH=10
OUTPUT="part_%03d.mp4"

if [ $# -eq 2 ]; then
	LENGTH=$2
fi

if [ $# -eq 3 ]; then
	LENGTH=$2
	OUTPUT=$3
fi

echo "split [$INPUT] every [$LENGTH]s"

ffmpeg -i $INPUT -map 0 -c copy -f segment -segment_time $LENGTH -reset_timestamps 1 $OUTPUT

optimize4web.sh

#!/bin/bash

function error_exit {
    echo "$1" >&2   ## Send message to stderr. Exclude >&2 if you don't want it that way.
    exit "${2:-1}"  ## Return a code specified by $2 or 1 by default.
}

if [ $# -eq 0 ]; then
    error_exit "No input filepath given"
fi

if [ ! -f "$1" ]; then
    error_exit "Input file does not exist"
fi

if [[ $(file --mime-type -b "$1") != video/mp4 ]]; then
	error_exit "Input file is not a mp4 video"
fi

INPUT=$1
OUTPUT=$1'.out'

if [ $# -eq 2 ]; then
	OUTPUT=$2
fi

echo "encode [$INPUT] as theora.OGV"
ffmpeg -i $INPUT -vcodec libtheora -q:v 7 -c:a libvorbis -q:a 4 $OUTPUT'.theora.ogv'
echo "encode [$INPUT] as x264.MP4"
ffmpeg -i $INPUT -vcodec libx264 -pix_fmt yuv420p -profile:v baseline -level 3 $OUTPUT'.x264.mp4'
echo "encode [$INPUT] as vp8.WEBM"
ffmpeg -i $INPUT -vcodec libvpx -qmin 0 -qmax 50 -crf 10 -b:v 1M -acodec libvorbis $OUTPUT'.vp8.webm'
echo "encode [$INPUT] as vp9.WEBM"
ffmpeg -i $INPUT -vcodec libvpx-vp9 -b:v 1M -acodec libvorbis $OUTPUT'.vp9.webm'