quot;DivX Audioquot; (WMA2) --gt; MP3 alpha, welcome, anything, question

andy

Hi !

I have some DivX with WMA2 stream (old DivX ;-) 3.11 alpha audio codec), and I'd like to convert those streams to MP3 (or even anything else), before remuxing.

Does someone know how to do this ? I tried BeSweet, but it dont know how to decode such stuff ...  

Thanx for your help !

Hi and welcome!
I assume your question was probably not answered yet, because the solution could easily be found using the search button...

You can nearly always produce a wav file out of formats which can't be recognized by besweet, using several methods...

Method 1: Use Virtualdub, Nandub, or Virtualdubmod...
Load your avi, set audio to full processing mode, and go to file-gt;save wav. This may be a little different for Virtualdubmod, but the principle is the same...

Method 2: Use Graphedit...
With graphedit you have total control about the directshowfilters that are loaded for decoding a file...
Start it up, then select quot;Render Media Filequot;, choose your avi (or wma2)... Then you delete all filters behind the decoder (select them with the mouse, press delete - when you rendered the avi, delete all video-filters behind avi-splitter), insert wav.dest (press strg+f, then go to directshowfilters), and file writer... Set file writer to your destination-file with the extension wav.
Now press the green play-button on top of Graphedit, and wait until it is green again... Done...

Be warned: The wav file will eat probably gt;1GB, this depends on its lenght, of course...

Hope this helps!

Hi !

Thank you for your help !! I just forgot to full process the audio stream !! (

Now my problem is : how to get the same audio quality within the same file size ? I mean, my DivX Audio track is 42.9Mb (64KBps), and I dont even imagine how to get the same sizeamp;quality with mp3 ... I tried some low quality encodings, but the resulting size is 50% bigger in the best cases ... What did I miss ?!

Thank you again !

The question would be why you would need to convert at all?

By converting, you will not be able to get either comparable audio quality and file size.

Remember that the quality can only be as good as the source. It's true that MP3 delivers higher quality than WMA, but if the source is already WMA, there's nothing to gain. You'll only further degrade quality by re-compressing to MP3.

I've a divx with WMA audio and when I play it cannot hear anything. So I tried to convert wma audio in mp3 following suggestions I found in this topic, but:

1)Virtualdub, when trying to start converting in wav, told me that's no possible and to check to have the requiered codec (Microsoft Audio Codec);

2)Graphedit popup an error dialog and then show a graph without audio branch.

I don't understand what codec I lost... And if is really here the problem or the conversion don't start because of some my own error.

Thanks.

P.S.
Sorry for my bad english.

Bad thread !
Look in the audio faq Post 17 (General gt; Audio encoding gt; Audio FAQ)

Originally posted by Mole
The question would be why you would need to convert at all?
By converting, you will not be able to get either comparable audio quality and file size.
Remember that the quality can only be as good as the source. It's true that MP3 delivers higher quality than WMA, but if the source is already WMA, there's nothing to gain. You'll only further degrade quality by re-compressing to MP3.

I'd like to convert cause I dont want to keep dummy files with dummy codecs. Yes, I just would like to know how to get with mp3 re-encoding a quality as close as possible from the 'original' wma.

I have resolved the file size problem with lame ABR (same kbps -gt; exact same size) but I can perfectly hear some quality loss with certain types of sounds. Do you think I can achieve something accpetable or I just lose my time ?

Thanx !

Well, in that case, you shouldn't have downloaded such quot;dummyquot; files in the first place.

I would recommend to keep it as it is.

MP3 audio quality is very poor at very low bitrates. LAME is also optimized for higher bitrates gt;128.

Also beware that LAME will automatically lower the sample rate to 32 000 hz or lower for low bitrate encodes.

If you really want small file size, you should try out OGG.

That should give you small file size and better quality than MP3.

Good idea !! I tried encoding with ogg, and the result is just ... perfect !! Better, the overhead of muxing oggamp;divx is very small ! I think I'll only make .ogm in a near future !
Thanx again for your help !