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Now with support for multiple audio stream, separate automatic bit-rate for every stream and detection if file is a video. Videos will not be deleted and only the audio will be converted into an audio file
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Leaced 2023-03-26 13:22:40 +02:00 committed by GitHub
parent 3dc9fe9a7f
commit 999caf1c12
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1 changed files with 24 additions and 18 deletions
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42
to_opus.sh
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@ -25,27 +25,33 @@ fi
for file in **/*.@($extension); do
# getting information about the streams
channels=$(ffprobe "$file" -show_entries stream=channels -select_streams a -of compact=p=0:nk=1 -v 0)
bitrate=$(ffprobe "$file" -show_entries stream=bit_rate -select_streams a -of compact=p=0:nk=1 -v 0)
streams=$(echo "$channels" | wc -l)
# setting bitrate
if [ streams -gt 1 ]; then
echo "Error: Automatic Bitrate is not supported for files with multiple audiostreams. The default bitrate of 128k will be used"
bitrate="128k"
elif
case $channels in
1) if [$bitrate -gt 64000]; then bitrate="64k"; fi;;
2) if [$bitrate -gt 128000]; then bitrate="128k"; fi;;
6) if [$bitrate -gt 256000]; then bitrate="256k"; fi;;
8) if [$bitrate -gt 450000]; then bitrate="450k"; fi;;
*) bitrate=128k";;
esac
#set a channel-dependent bitrate for every audio stream
command=$(
ffprobe "$file" -v 0 -show_entries stream=channels,bit_rate -select_streams a -of compact=p=0:nk=1:s="\ " |
awk -v file="$file" -v file_output="${file%.*}.opus" '
BEGIN{
ORS=" ";
print "ffmpeg -threads 4 -i \""file"\" -map 0:a -c:a libopus"
}
{ # https://wiki.xiph.org/Opus_Recommended_Settings
if($1==1) print $2>=64000 ? "-b:a:"NR-1" 128k" : "-b:a:"NR-1" "$2
else if($1==2) print $2>=500000 ? "-b:a:"NR-1" 128k" : "-b:a:"NR-1" "$2
else if($1<=6) print $2>=256000 ? "-b:a:"NR-1" 128k" : "-b:a:"NR-1" "$2
else print $2>=450000 ? "-b:a:"NR-1" 128k" : "-b:a:"NR-1" "$2
}
END{
print "\""file_output"\" -v 32 -hide_banner"
}')
is_video=$(ffprobe "$file" -v 0 -show_entries stream=codec_type -of compact=p=0:nk=1:s="\ " | grep video)
if [[ -n "$is_video" ]]; then
eval "$command"
else
#eval "$command" && rm "$file"
fi
# https://wiki.xiph.org/Opus_Recommended_Settings
ffmpeg -threads 4 -v 0 -i "$file" -map 0 -c:a libopus -b:a $bitrate "${file%.*}.opus" && rm "$file"
done
exit 0