How do you increase volume when recopying a DVD?

[JoeBolden]

I got a burned dvd from a friend but when I play it on 2 dvd players and my computer the sound volume is low even with maximum volume control.

What is the easiest way to copy this dvd and increase the volume before burning it?

Thank you,

Joey


PowerDVd shows it as MPEG-2 video and Dobly Digital 5.1 448Kbps audio

and Nero info
Nero InfoTool 3.00
Disc Information (D:\)
+------------------
Type DVD Video (DVD+R)
Capacity 4.38 GB
Layers 1
Version 1
Disc Size 12 cm
Video Format NTSC 4:3 (Mpeg 1, 720x480)
Region(s) All
Play Time 132 minutes (02:12:23)
File System ISO9660, UDF
Title
Date 28 June 2005
Publisher n/a
Application MKISOFS ISO 9660/HFS FILESYSTEM BUILDER & CDRECORD CD-R/DVD CREATOR (C) 1993 E.YOUNGDALE (C) 1997 J.PEARSON/J.SCHILLING

[guns1inger]

You can't easily change the volume. The only way to do this is

1. Demux video and audio to elementary streams
2. Demux multi-channel audio to 6 mono wav files
3. Increase the volume in each mono wav file
4. Re-encode the 6 mono channels back to 5.1 AC3
5. Re-author the disk to get it all back together again.

Was the original this low ?
How did you copy it ?