added mkv_to_mp4.sh
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#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2020-05-19 19:42:22 +0100 (Tue, 19 May 2020)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Converts any MKV files given or found recursively under given paths or current directory to mp4 format using ffmpeg
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Useful to be able to stream videos to devices like smart TVs that may otherwise not understand the codecs used in the original format
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Names the generated files the same except with the '.mkv' extension replaced with '.mp4'
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Skips files which already have a corresponding adjacent '.mp4' file present to be able to resume partial directory conversions, and also removes partially complete files for consistency using bash trapping
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="[<files_or_directories>]"
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help_usage "$@"
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#min_args 1 "$@"
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check_bin ffmpeg
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SECONDS=0
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time \
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for basedir in "${@:-.}"; do
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while read -r filepath; do
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mp4_filepath="${filepath%.mkv}.mp4"
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#if [ -n "${FORCE_OVERWRITE:-}" ] ||
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if ! [ -s "$mp4_filepath" ]; then
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trap_cmd "echo; echo 'removing partially done file:'; rm -fv '$mp4_filepath'; untrap"
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timestamp "converting $filepath => $mp4_filepath"
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if [ -n "${QUICK:-}" ]; then
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time nice ffmpeg -i "$filepath" -vcodec copy -acodec copy -scodec mov_text -movflags +faststart "$mp4_filepath" < /dev/null # don't let the ffmpeg command eat the incoming filenames
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# -sn disabled subtitle stream
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#time nice ffmpeg -i "$filepath" -vcodec copy -acodec copy -sn -movflags +faststart "$mp4_filepath" < /dev/null # don't let the ffmpeg command eat the incoming filenames
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else
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# the default encoder doesn't work on TV for some stuff
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time nice ffmpeg -i "$filepath" "$mp4_filepath" < /dev/null # don't let the ffmpeg command eat the incoming filenames
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# don't copy codec as is but transcode into something your TV can understand / pause / forward
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#time nice ffmpeg -i "$filepath" -c:v libx264 -movflags +faststart "$mp4_filepath" < /dev/null
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# none of this worked either
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#time nice ffmpeg -i "$filepath" \
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# -vcodec mpeg4 \
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# -acodec aac \
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# -sn \
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# -movflags +faststart \
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# "$mp4_filepath" < /dev/null
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# -vcodec libxvid # really pixelated even at 1GB -> 1GB conversion
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# -vcodec mpeg4 # works but extremely pixelated
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# -qscale:v 17 # even with this, and the files come out huge, bigger than MKV originals
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#-acodec mp3 # aac is native and better quality
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#
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# none of these work on my TV
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#-vcodec libx264
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#-vcodec mpeg2 # not found - must be too old and not compiled in
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fi
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echo >&2
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fi
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done < <(find "$basedir" -type f -iname '*.mkv')
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done
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echo >&2
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timestamp "All conversions completed in $SECONDS secs"
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untrap
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