On 28/06/17 01:11, Russell Coker via luv-main wrote:
Is there a way of balancing loudness of different mp4 files? While it's
impossible to do this perfectly (there is no general agreement on how to
measure it) it is possible to give a good approximation.
My music video collection that I downloaded from youtube has videos of
significantly different loudness, so when I watch a selection of videos that
suit my mood with mplayer I have to change the system volume every few videos
because I get to one that's either too loud or too quiet for the current
settings.
I'd like to run a script across my video collection to get the average
loudness of each video so the mplayer softvol setting can be adjusted to
compensate. Then of course I'd do some manual adjustment like increasing the
volume of The Divinyls and The Angels.
hi
something like this should do it
------------------------------------------
#!/usr/bin/bash
vid=$1
tx=${vid%.*}
ffmpeg -i $1 -vn -b:a 256k $tx.mp3
ffmpeg -i $1 -an $tx.mkv
normalize $tx.mp3
ffmpeg -i $tx.mkv -i $tx.mp3 $tx.n.mkv
rm $tx.mp3
rm $tx.mkv
mv $tx.n.mkv $tx.mkv
------------------------------------------
normalize is a package in rpmfusion-free for Fedora users
first ffmpeg removes the video
next ffmpeg removes the audio
final ffmpeg put it back together
Steve
_______________________________________________
luv-main mailing list
[email protected]
https://lists.luv.asn.au/cgi-bin/mailman/listinfo/luv-main
