Change audio gain in .wmv files???

[Pad]

I'm looking for a way to change the volume gain on .wmv files without having to rencode so I don't lose any of the picture quality. I know there are ways to do this with .avi files using Avidemux or VirtualDub, but they won't work with .wmv files.

Any help would be really appreciated.

TIA

[OddBa11]

AviDemux lists wmv support, so I assume you have tested it on those files? Do you have the latest version?

There are also several versions of VirtualDub (ie: VirtualDubMod and I believe a third version as well).

Take a look over at videohelp.com

[Pad]

Originally Posted by OddBa11

AviDemux lists wmv support, so I assume you have tested it on those files? Do you have the latest version?

There are also several versions of VirtualDub (ie: VirtualDubMod and I believe a third version as well).

Take a look over at videohelp.com

I'm pretty familiar with AviDemux and I have four versions of VirtualDub (including VirtualDubMod) on my machine. I can open the .wmv files in both programs, and I can adjust the gain in both programs - but I then have to ouput to a format other than .wmv. That means a re-encode which means loss of picture quality.

I want to change the gain of the .wmv files without altering the video stream. It can be done for .avi files in both AviDemux and VirtualDub but not .wmv.

Thanks for the suggestion anyway.

[Armanoïd]

"http://videohelp.com/tools/AsfBin"
There's AsfBin that allow you to fix/repair ASF and WMV files.

"http://sharewareconnection.com/asfbin.htm"

"...AsfBin can be applied for any ASF file, that is, not only those with ASF extension but also those with WMV and WMA extensions. The whole operation is performed without any recompression."

Seems good.

"...AsfBin is an application that allows you to edit and repair ASF files."
Well if it can edit, I guess there's a way to do things to the soundtrack, but not sure you can perform advanced tasks, such as gain changes, but maybe it is possible to remove the soundtrack and place it by an other one, I don't know.

It seems this program is a pain in the ass to use btw, but it works.

Now what I would try is this:
Extract and edit the soundtrack (effects>normalize) with Audacity (Audacity can read .wmv files):
"http://audacity.sourceforge.net/download/windows"
And then, export it to an audio format supported by AsfBin (.wma I guess).

When it's done, import the new sound track in AsfBin to replace the old one.

I don't know if it's possible, but there's a chance.



EDIT:

It seems there's an other solution:
"http://forum.digital-digest.com/f21/amplifying-wmv-audio-without-re-encode-55574.html"

Here's the discussion:


lotech :"Hi, I've got a WMV project I've been working on and after encoding the clips I find the audio is a little low, re-encoding the whole job isn't really the way (6hrs of total footage = 18hrs of rendering) and I was hoping there would be a 3rd party program to amplify the WMV's audio track with any recompression (audio would be dealable). Virtualdub of course has such features but since 1.3 hasn't been legally able to include WMV editing it won't open the WMV9 clips. Blaze Media Pro wants to recompress the both audio/video.
Any pointers? "


anonymez : "first of all, make sure you have the latest version of 'windows media encoder'. in the start menu, in windows media-->utilities, there should be 'windows media stream editor'

use this to demux (separate) the audio from the video file. then re-encode the audio with a program of your choice, which should also have options to boost the audio (if 'blaze media pro' supports wmv, it should support wma). then simply use the 'windows media stream editor' to mux (join) the audio and video together again. should be done in a very short time"


lotech :" Cheers for that, when I load attempt to load it in windows media stream editor it errors and reports input media format is invalid. It reports this for all the files I've made, they were exported/encoded in FCP on our edit suite using Popwire wmv encoder so I can't blame it but a pain none the less. All the other M$ encoder programs included (profile/file editor) open them fine. Looks like I'll be re-encoding the whole lot from scratch."


anonymez : "guess so... i don't know of any other programs that can demux wmv. another reason not to use it... "


benbryant :"Iotech!
After trying quite a few available programs without result, I almost gave up. Finally I succeeded by opening a .wmv file with GoldWave, editing the audio (altering its volume, for example), and saving it with different types of audio formats
Regards"



anonymez :"glad it all worked out"