Amplify asf audio

[Silus]

I have made a video with Tegrity for teaching a class. Unfortunately the audio was recorded too low.

There are several asf files, and i found one that is audio only. I want to amplify the audio in this asf file, but have not been able to find a solution.

Thanks

[Soopafresh]

Not very easy because it's an ASF file and they're more painful to edit.

The basic steps are:

Convert ASF to WAV

Apply Gain/Normalization to WAV

Convert WAV to ASF

[Silus]

Thanks for the help.

I was able to convert to a wave using mplayer as described in https://forum.videohelp.com/topic281724.html

I used Ubuntu, so I just typed sudo apt-get install mplayer instead of downloading from the site.

I'm using Audacity now, and I see that I can adjust the gain easily, but I'm trying to reduce the noise now.

I guess I should just try different settings, until I'm satisfied with the quality.

Hopefully mplayer will convert back from WAV to ASF as easily.

[Silus]

Well, it all worked except the audio file didn't really do anything; Tegrity just put that file there for fun.

Anyways, I've found that I can use AVS Video converter to amplify the file. Since I'm using the freeware version, I think I'm going to end up with a watermark on my video unfortunately...

I might try to use mplayer to convert to an easier format to deal with and try that if the watermark is too obnoxious.

EDIT: Well AVS doesn't seem to be able to output files as ASF files...

EDIT2: I forgot to mention that now the ASF file is both audio and video, before I was only dealing with audio and AVS will not work with audio only ASF

[Soopafresh]

Hence the caveats... Windows Media files can really be a PITA

[Silus]

Yeah, it sure is

Well, I spent some time in the mplayer IRC and they helped me out quite a bit. Unfortunately, mplayer ASF files will not play in Windows Media Player, but they told me that ASF is really close to WMV.

I ended up using AVS, even though the watermark IS obnoxious, and saving as a WMV. At that point, I just changed the extension to ASF, and it seems to work for me.

I have some noise in the video, but it is louder now, so that's good enough for tonight.