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Script to create an MPEG-4 (.mp4) video from PNG-format images
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Chris Greenshields
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May 15, 2015
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#!/bin/sh | ||
#------------------------------------------------------------------------------ | ||
# ========= | | ||
# \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | ||
# \\ / O peration | | ||
# \\ / A nd | Copyright (C) 2015 OpenFOAM Foundation | ||
# \\/ M anipulation | | ||
#------------------------------------------------------------------------------- | ||
# License | ||
# This file is part of OpenFOAM. | ||
# | ||
# OpenFOAM is free software: you can redistribute it and/or modify it | ||
# under the terms of the GNU General Public License as published by | ||
# the Free Software Foundation, either version 3 of the License, or | ||
# (at your option) any later version. | ||
# | ||
# OpenFOAM is distributed in the hope that it will be useful, but WITHOUT | ||
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
# for more details. | ||
# | ||
# You should have received a copy of the GNU General Public License | ||
# along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | ||
# | ||
# Script | ||
# foamCreateVideo | ||
# | ||
# Description | ||
# Creates an MPEG-4 compressed (.mp4) video file from PNG images | ||
# - requires mencoder | ||
# | ||
#------------------------------------------------------------------------------ | ||
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usage () { | ||
exec 1>&2 | ||
while [ "$#" -ge 1 ]; do echo "$1"; shift; done | ||
cat <<USAGE | ||
Usage: ${0##*/} [OPTIONS] ... | ||
options: | ||
-d | -dir <dir> directory containing png images (default local dir) | ||
-f | -fps <fps> frames per second (default = 10) | ||
-h | -help help | ||
-i | -image <name> name of image sequence (default = image) | ||
-o | -out <name> name of output video file (default = video) | ||
Creates an MPEG-4 compressed (.mp4) video file from a sequence of PNG images | ||
- A sequence named "image" will expect files image.0000.png, image.0001.png, etc | ||
- An output video named "video" will produce a file video.mp4 | ||
- By default the video codec is high resolution (x264) but there is an option to | ||
select a medium resolution codec (lavc) | ||
Requires mencoder | ||
USAGE | ||
exit 1 | ||
} | ||
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# Default settings | ||
DIR='.' | ||
IMAGE='image' | ||
VIDEO='video' | ||
FPS=10 | ||
VCODEC=x264 | ||
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while [ "$#" -gt 0 ] | ||
do | ||
case "$1" in | ||
-h | -help) | ||
usage | ||
;; | ||
-d | -directory) | ||
[ "$#" -ge 2 ] || usage "'$1' option requires an argument" | ||
DIR=$2 | ||
shift 2 | ||
;; | ||
-f | -fps) | ||
[ "$#" -ge 2 ] || usage "'$1' option requires an argument" | ||
FPS=$2 | ||
shift 2 | ||
;; | ||
-i | -image) | ||
[ "$#" -ge 2 ] || usage "'$1' option requires an argument" | ||
IMAGE=$2 | ||
shift 2 | ||
;; | ||
-o | -out) | ||
[ "$#" -ge 2 ] || usage "'$1' option requires an argument" | ||
VIDEO=$2 | ||
shift 2 | ||
;; | ||
-*) | ||
usage "invalid option '$1'" | ||
;; | ||
*) | ||
break | ||
;; | ||
esac | ||
done | ||
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# | ||
# MAIN | ||
# | ||
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[ -f "$(ls -1 $DIR/$IMAGE.*.png | head -1)" ] || usage "Cannot find first file in image sequence" | ||
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if command -v mencoder >/dev/null 2>&1; then | ||
mencoder \ | ||
"mf://$DIR/$IMAGE.*.png" \ | ||
-mf fps=$FPS \ | ||
-o $VIDEO.mp4 \ | ||
-ovc $VCODEC | ||
else | ||
usage "Please install mencoder" | ||
fi |