Vegas 10: problems opening ac3?

WarmGlow wrote on 10/11/2010, 9:59 AM

Hi guys,

yes, i have signed up for the Beta by immediately purchasing and installing Vegas 10 as opposed to waiting for a few updates. However, i'm only installing on my laptop to get familiar not my main system.

I'm upgrading from Vegas 4.0e. The first thing I tried to do, this morning, is open up a Mpeg2 video file and the accompanying audio, ac3 file, in Vegas 10. Both files were created in Vegas 4.0e and open/closed in Vegas 4.0e fine. However, only the Mpg2 video opens in Vegas 10. The ac3 audio file brings about an "unsupported" error message. So, that's basically it. The reason i.m confused.

Final, note I opened up both files (the Mpg2 and the ac3) is DVDA 5.2 with no does this mean I really can't open my video project (with the ac3 file) in Vegas 10 and adjust fades and whatnot? Lastly, I opened a regular Wave file in Vegas 10 and then saved that Wave as an ac3 studio. Then I tried to open the newly saved ac3 studio file in Vegas 10 and it says "unsupported." Then i tried to save that Wave as an ac3 Pro file. Vegas 10 saved it as an ac3 fine. However, when I tried to open the newly saved ac3 Pro file in Vegas 10 and it says "unsupported." So Vegas 10a wouldn't open either of the ac3 files that it had just saved.

I'm sure there is a simple solution so if someone could give me a more complete understanding. Much appreciated.

system: Windows Vista Service Pack 2
1.5 Intel® Core™2 Duo processor
2gb ram


essami wrote on 10/11/2010, 10:03 AM
Vegas doesnt support opening ac3 files unfortunately, but it does save it:
Rob Franks wrote on 10/11/2010, 10:06 AM
Vegas doesnt support opening ac3 files unfortunately, but it does save it:

This is not true.... but a lid has been placed on what files vegas will open that include ac3. It will open m2ts files with ac3 and VOB files with ac3
malowz wrote on 10/11/2010, 10:39 AM
vegas can't open "elementary" ac3.

if you mux the .ac3 file to .mpg for example, it opens fine.

same works for .m2v file. elementary don't open. muxed open fine.

you can use mplex for simple commandline muxing.

get here

theres a example and batch inside for easy process.

copy your ac3 file to the same folder, rename to "input.ac3", and run the batch file.

it will generate a .mpg file containing your audio only. no recompress done.
musicvid10 wrote on 10/11/2010, 10:44 AM
This is not a new behavior.

For .mpg (MPEG-2) with AC-3 audio, rename the extension to .vob.

For raw AC-3, mux in AVIDemux (very fast) or prepare to .vob in DVD Architect (older workaround).

A forum search will lead one to more details. Consensus is it has to do with the Dolby licensing agreement with Sony.
malowz wrote on 10/11/2010, 10:57 AM

the new vegas 10, if you rename the .ac3 to .mpg it opens without the need for muxing ;)

vegas 9 this won't work ;)
musicvid10 wrote on 10/11/2010, 11:01 AM
Cool shoes!

Thanks for posting!
WarmGlow wrote on 10/11/2010, 11:45 AM
Thank You for taking the time to offer feedback:


Rob Franks


and musicvid

I'm enjoying Vegas 10 and now, all the more so, with the renaming the ac3 as .mpg trick. Thanks again Malowz!