Subject:AC-3 stream of .mts files

Posted by: jtjt

Date:1/2/2009 1:35:03 AM

I want to edit the 5.1 audio in .mts files in Sound Forge 9.0 (Vegas Movie Studio 9.0 recognises these files immediately and opens the audio with 6 channels). Firstly Sound Forge doesn't recognise these media files, secondly - if I change the extension to .m2t, then the best I get is Sound Forge finding stereo, but no video.

Any ideas?

Thanks

Subject:RE: AC-3 stream of .mts files

Reply by: jtjt

Date:1/4/2009 2:10:58 AM

Further info to my previous post:

I rendered with Vegas both M2TS and WMV - both with 5.1 - from an MTS file. Here Sound Forge only opened stereo in the case of M2TS (though 5.1 was present), but did manage 5.1 in the case of WMV.

I don't really want to have to reencode many MTS files if it can be avoided!

Subject:RE: AC-3 stream of .mts files

Reply by: musicvid10

Date:1/4/2009 4:48:59 PM

Unless your VMS9 renders to 5.1 PCM (and I think only V8 Pro does this), I think you may be stuck with the options you have already found.

Sound Forge 9 has some limitations on the kinds of multichannel files it will open.

Subject:RE: AC-3 stream of .mts files

Reply by: jtjt

Date:1/5/2009 12:16:46 PM

The only audio option seems to be AC3 5.1 not PCM 5.1 as you think (VMS), so you may be right.

What I really don't understand is why VMS recognises AC3 5.1, but Sound Forge does not. When M2TS is a Sony standard and it includes AC3 5.1 in the audio stream, you might think that Sony would make all its software be able to manage files according to their standard?!

Thanks for the help.

Subject:RE: AC-3 stream of .mts files

Reply by: musicvid10

Date:1/5/2009 5:44:56 PM

According to this website, Sound Forge 9 will render 5.1 AC-3, but not import it. I believe this is a licensing curmudgeon, since Vegas Pro behaves similarly. The workaround in Vegas is to prepare a DVD folder in DVDA, and then import the rendered .vob files, in which case the AC-3 multichannel audio shows up in the timeline.

That being said, I have no idea whatsoever if this or a similar workaround will do it in Sound Forge 9.

Upgrading to Vegas Pro 8 is one option that is available to you; I think the available upgrade prices, esp. if you happen to qualify for an academic upgrade, are quite reasonable.