Normalizing volume on two ac3 files

[mrtoad883]

I combined two videos. Both have ac3 5.1 surround sound files except one is 640 and the other is 448. The 640 sounds louder and I want them both to have the same volume. Any programs that can equalize it?

[pandy]

Check metadata - dialogue normalization value - both tracks should be -31

[mrtoad883]

just checked, they both have a dialnorm value of -31, just the 448kps bitrate sounds quieter compared to the 640kps

[V1de0Luvr]

Why not normalize with FFmpeg:

ffmpeg.exe -i "input.ac3" -af dynaudnorm=p=0.70:m=100:g=11:s=12 -ab 448k -ar 48000 -acodec ac3 "output.ac3"

[mrtoad883]

Ok I'll give it a whirl, never used ffmpeg before but thanks for the input!

[pandy]

just checked, they both have a dialnorm value of -31, just the 448kps bitrate sounds quieter compared to the 640kps

How did you verified dialnorm config?

[mrtoad883]

Checked it with mediainfo

[pandy]

Checked it with mediainfo

This can be true for first ac3 frame... - you should check all frames IMHO.

[mrtoad883]

Interesting..how do I go about doing that?

[mrtoad883]

stumbled upon AC3Filter on the site, think that would do the trick?

Edit: nevermind. Looks like I can do what I need with avidemux by adjusting gain in audio filters