79 lines
2.8 KiB
Bash
Executable File
79 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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# muxsa-pngaac2mp4
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#
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# part of muxsa, https://git-nks-public.tik.uni-stuttgart.de/edu/muxsa
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#
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# this script tells ffmpeg (https://ffmpeg.org/) to read
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# a series of slides in png file format (created with muxsa-kvm2png),
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# a soundtrack.aac (recorded with audacity), and
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# a ffmpeg concat multiplexer sequence file (created with muxsa-al2fc)
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# and multiplex everything together
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# into a mp4 video of the slideshow with background narration
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# MIT License
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#
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# Copyright (c) 2023 Sebastian Kiesel <sebastian.kiesel@tik.uni-stuttgart.de>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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############################################################################
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# see https://trac.ffmpeg.org/wiki/Slideshow
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echo "This is muxsa-pngaac2mp4."
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OUTFILE="out.mp4"
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if [ "$1" ] ; then
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OUTFILE="$1"
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# make sure that file ends on .mp4
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OUTFILE="${OUTFILE%%.mp4}.mp4"
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fi
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if [ ! -f slides.concat ] ; then
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echo "error: file slides.concat missing. abort."
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echo "consider using muxsa-al2fc for creating one."
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exit 1
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fi
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if [ -f soundtrack.m4a ] ; then
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AUDIOFILE="-i soundtrack.m4a"
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AUDIOOPTS="-c:a copy"
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else
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if [ -f soundtrack.wav ] ; then
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AUDIOFILE="-i soundtrack.wav"
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AUDIOOPTS="-c:a aac -b:a 128k"
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else
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if [ -f audio.concat ] ; then
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AUDIOFILE="-f concat -i audio.concat"
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AUDIOOPTS="-c:a aac -b:a 128k"
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else
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echo "neither soundtrack.m4a, .wav, nor audio.concat found. abort."
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exit 1
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fi
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fi
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fi
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ffmpeg -f concat -i slides.concat ${AUDIOFILE} \
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-vsync cfr -vf fps=25 \
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-c:v libx264 -preset slow -tune stillimage -crf 23 -pix_fmt yuv420p \
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${AUDIOOPTS} \
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-movflags +faststart -brand mp42 "${OUTFILE}"
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############################################################################
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