Could you add a way to call audio filters in the script?
hwwilliams opened this issue · comments
So I've been digging around and finally found that ffmpeg can do audio normalization and it can be done using audio filters
https://ffmpeg.org/ffmpeg-filters.html#Audio-Filters
One such filter I'd like to be able to do is loudnorm
https://ffmpeg.org/ffmpeg-filters.html#loudnorm
If you don't want to implement this or if its just to much trouble I'll understand of course, just thought it'd be a nice feature as I've run across tons of files that just don't get loud enough or are too loud.
All I'm really wondering is if there'd be a way to add a section in the variables where I could add something like 'loudnorm -i -25' and it'd pass that to ffmpeg's audio filter.
Hey, sorry for the (extreme) delay in responding, it's been a really hectic summer/autumn so far. I looked at the documentation you provided (thanks for the links), and while this seems like a good feature, it would significantly increase the amount of time the script takes to complete because ffmpeg first has to scan the entire file in order to determine the norm level. I haven't ruled this out yet since it's something that even I would like to see. It's not going to be a small change, though, so it may not make the next release (and will also take time to test). I have a baby due in early November, and finals for my last semester of university right after that, so time is going to be a luxury for a while.
Totally understand, no pressure or anything. Just as you said, I thought it'd be a nice feature and funny this is I haven't actually had a problem with audio levels on a file for awhile now anyway.
Congrats on the kid.
I might write a different script to address this, but I don't think I'm going to implement it in this script since it's outside the scope of "lessening transcodes".