diff options
Diffstat (limited to 'ffmpeg-extract-audio-from-video.bash')
| -rwxr-xr-x | ffmpeg-extract-audio-from-video.bash | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/ffmpeg-extract-audio-from-video.bash b/ffmpeg-extract-audio-from-video.bash new file mode 100755 index 0000000..f9498b0 --- /dev/null +++ b/ffmpeg-extract-audio-from-video.bash @@ -0,0 +1,37 @@ +#!/bin/bash +# Copyright © 2024 DiffieHellman +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program 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 Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see <https://www.gnu.org/licenses/>. + +# Return invalid usage if there aren't at least 2 args +[ "$#" -gt 0 ] || exit 2 + +# $video is each video after argv[0] +for video ; do + # Probe the audio format + audioformat=$(ffprobe -loglevel error -select_streams a:0 -show_entries stream=codec_name -of default=nw=1:nk=1 "${video}") + # Remux if already in a free format, otherwise rencode to opus + if [ "$audioformat" = "opus" ]; then + ffmpeg -i "${video}" -map_metadata 0 -c:a copy -vn -sn "${video%.*}.opus" + elif [ "$audioformat" = "vorbis" ]; then +# ffmpeg -i "${video}" -map_metadata 0 -c:a copy -vn -sn "${video%.*}.ogg" + #hack to turn first frame of video into 300x200 thumbnail and embed it into flac as ffmpeg doesn't yet support embedding thumbnails in ogg in the standard way + ffmpeg -i "${video}" -map_metadata 0 -map 0:v -vf trim=1:2,thumbnail,scale=300:200 -map 0:a -disposition:v attached_pic -c:a copy "${video%.*}.ogg" + elif [ "$audioformat" = "flac" ]; then +# ffmpeg -i "${video}" -map_metadata 0 -c:a copy -vn -sn "${video%.*}.flac" + #ditto + ffmpeg -i "${video}" -map_metadata 0 -map 0:v -vf trim=1:2,thumbnail,scale=300:200 -map 0:a -disposition:v attached_pic -c:a copy "${video%.*}.flac" + else + ffmpeg -i "${video}" -map_metadata 0 -c:a libopus -vn -sn "${video%.*}.opus" + fi +done |