final avi file using Nadub and AviSynth way too big

[pintree3]

Hi

I have a series of avi files all from the same source--all are fine except one. It has sound that is too low. I tried to find a simple way of boosting the sound (before burning it to CD) but could not find one. So the only thing I came close to was to use NanDub (or VirtualDubMod) in combination with aviSynth. I never did command lines before.But I created an avs file like this:
AviSource("d:\name of movie title.avi")

AmplifydB(+12)

And that is all I wrote. Anyhow, I then used the above programs, tried 'Direct stream Copy" "Quick Compress' tried the Divx Codex, etc. All gave me a file tha was over 4Gig big. The original is only about 225,000K. So I was trying to find a command line I could add to the .avs file so the final .avi remains the same size as the original (or make it smaller).
Or if anyone knows of a simpler way, for example another program that does it in simpler steps, I would truly appreciate it.

Thanks

[bill_baroud]

Avisynth decompress video before send it to the world, so yeah, it's big if you don't compress it. There was some talk about direct stream copy in the Avisynth Dev forum, and iirc esby wrote a tool to do something like that but i'm not sure if it does exactly what you're seeking.
Latest VirtualDub has some audio filters, no ? it doesn't work with your file ? it would be a lot more simpler and you could use direct stream copy.
Another way : demux audio, use something like audacity to amplify the track and remux video+audio... not too much work.

[pintree3]

Thanks a million
I will look into this 'demux audio, anduse something like audacity 'thing ASAp
cheers

[mg262]

nanDub can do the re-muxing, by the way. it's been awhile since I tried it, but I think you just need to load the original AVIfile,look under the audio menu and select the audio source, and use direct stream copy.

It should be possible to batch file automate all this stuff,but it would be a bit of work... but may be worth looking into if you have a lot of files to convert.

[Mug Funky]

another thing that might interest you (if your source audio is mp3) is mp3gain.

it will scan an mp3 and find it's loudness, then (losslessly!) apply a gain to the mp3 file _without_ transcoding it. it'll give you a standard reference volume (-20dB FS = 0dB VU, not that that's too important).

you could scan all your sound tracks and they'll all play back at the same volume (give or take 1.5dB, which is sod-all. this is because mp3's scalefactors work in increments of 1.5dB). means you'll never have to reach for the volume control :)

[pintree3]

Thanks to you as well.
The problem with NanDub is that it won't do file bigger than 4Gig, even though the original file s 225,000. so it will not complete the task. I haven't tried Audacity yet but hope to do so before the day is over. But seriously, isn't there a program out there that will simply take the file as is and just boost the audio without doing anything else (Why must things be so complicated?) Or something that while compressing the file (say from 225,000K to 200,K000) can in the process boost the sound? Or Something that will change it from one type of avi (say Divx t Xvid) and do the boosting?
Heck I have another easier solution--try to download the file from a different original source.

Thanks again