/tech/ - Technology★

You could just turn on drc in your video player.

>>961899

I use VLC and it looks like you have to dick around with equalizer settings which is too much for me. I just want simple normalization for brainlets.

I'm sure there's a ffmpeg one-liner for this

>>961905

c'mon son

https://superuser.com/questions/323119/how-can-i-normalize-audio-using-ffmpeg

>>961912

>>961913

restart vlc when your done

Extract audio tracks.

Normalize tracks.

mkvmerge everything

Not OP, but I have another question: Is there a way to change an audio that only play in one ear, to play in the second?

That's very very frustrating to listen to a talk with only one of your ears.

I haven't found any option in mpv.

>>962014

ffmpeg

https://trac.ffmpeg.org/wiki/AudioChannelManipulation

>>962014

simplest answer from that page would be along the lines of

>Create a stereo output from one mono input:

ffmpeg -i input.mp3 -ac 2 output.m4a

>>962014

>>962022

Most often it is a mono file set to stereo. Every mono file should play in both ears if the container is set correctly.

So if it is a mono file in a stereo container, better would probably be to fix it with:

ffmpeg -i input.mp3 -ac 1 output.mp3

>>962312

>ffmpeg -i input.mp3 -ac 1 output.mp3

this would assume the input is stereo and mix them into mono. Any out of phase audio would cancel out. The effect of doing this would reduce the volume considerably, and you would need to run a volume normalization filter after scanning the audio for the correct values to do so.

The prior suggestion >>962022 should solve the problem without such volume degradation. However, the most accurate solution is to choose a channel and map it as the mono channel.

>Choose a specific channel

> This example uses the pan audio filter to include only the right channel:

ffmpeg -i stereo.wav -af "pan=mono|c0=c1" mono.m4a

Would use the right channel for the resultant mono stream.

If you only want the left channel use c0=c0 instead.

>>962841

obviously you could extend this to copy one channel to the other / swap them / etc for stereo.

>>961901

>right click video

>select normalize audio from drop down menu

was it that hard?

>>962841

The premise of my take on the problem, was that the audio was mono in a container marking it as stereo. I don't know what ffmpeg would, do but you are most certainly right that it is more precise to map the stereo track that has sound in it instead of leaving it up to ffmpeg what to do.

However in this case doing ffmpeg -i file.mp3 -ac 2 file2.mp3 would not make the file play in stereo, as it would still be one track with the mono sound and a blank one.

http://www.conversationsnetwork.org/levelator