I have a number of video and audio files that I want to increase the volume of so they are all set to 0. Would like to run these in a batch mode if possible; have 130 files.

Also have one file audio and video that the left channel is not recorded well. How would I make this into a mono and adjust the volume? I think I could use Audacity on the audio, but not sure how to do this on the video.

Thanks

How to change audio volume up-down with FFmpeg


Check HandBrake for movie files

Thanks for the reply.

I was looking for something that would allow me to run a program in batch mode: telling the program to adjust the volume to 0 of the files in a folder. I might have found a way to do this with Audacity for the audio files. With the video files I can import the audio, but have to export the audio as a file after editing; this doesn't help with audio level in the video.

ffmpeg: looks like I would have to edit the files one at a time, because I nee to find out the volume level of the file first, and are not all the same.

@ JosephS

Visit this link
http://superuser.com/questions/32311...o-using-ffmpeg

And scroll down to Using ffmpeg to normalize audio

It will show you how to get the audio level first before applying the gain to it. E.g

[Parsed_volumedetect_0 @ 0x7f8ba1c121a0] mean_volume: -16.0 dB
[Parsed_volumedetect_0 @ 0x7f8ba1c121a0] max_volume: -5.0 dB
[Parsed_volumedetect_0 @ 0x7f8ba1c121a0] histogram_0db: 87861

As you can see, our maximum volume is -5.0 dB, so we can apply 5 dB gain. If you get a value of 0 dB, then you don't need to normalize the audio.

Next, apply the volume filter to increase the audio. Read the rest at

http://superuser.com/questions/32311...o-using-ffmpeg

They will provide three situations to applying the volume filter depending on the media type, i.e wav, avi and mp4.

PS: If you know shell scripting, you can use or modify the script on the site to suit your needs. I would suggest trying this out on a few test files first and see if it gives the results you want.

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Thanks for the links