I'm Not Getting Any Audio

Fletch47 wrote on 7/22/2007, 8:52 AM

Did you ever get an answer to this question? This is just now happening to me. I have used Video Capture tool to capture (video and tape) about 3 times now. The vid capture tool will play back the sound fine....but when closing it out and previewing the file in the studio , ONLY GET THE VIDEO PORTION. Dragging the file to the edit pane shows almost an empty sound component.

BirdOPrey5 wrote on 9/27/2007, 7:36 AM

I am having the same problem, and I can't import old files that I know had working audio... The files work fine in Vegas 7 but no audio stream found in Vegas 8.
I can see audio from WMV and some AVI files, but audio from MPEG2 files just doesn't show.

BirdOPrey5 wrote on 9/27/2007, 12:36 PM

Ok I brought a mpeg2 file from my machine to a buddies who said he had Vegas 8 and had no problems... we tried to open the mpg file on his, and it also had no audio... so I don't think ANY copies of Vegas 8 will open these files... then he went and found some MPEG2 files of his own (he doesn't usually use them) and they didn't have/show audio either... How could a bug this big exist?
Has anyone been able to open mpeg2 files with Vegas 8?

Kennymusicman wrote on 9/27/2007, 1:30 PM

I've experienced similar - butI find I can get audio if I play from the beginning of the file. Skip along, and audio drops out. But then, the audio aspect would be drawn, just not heard, so I duplicate the track, and suddenly I have audio ...

HTH

Ken

BirdOPrey5 wrote on 9/28/2007, 9:15 AM

I can't duplicate a track that doens't show up at all.

pmooney wrote on 10/2/2007, 10:54 AM

Ditto for me....no MPEG-2 audio. Vegas 7 has no problem showing audio for the same file that Vegas 8 can't.

jabloomf1230 wrote on 10/6/2007, 2:30 PM

Same here. My mpg file was created with the Main Concept encoder using Vegas 7 and every other piece of software can play and/or edit the file fine. Unfortunately, there's no audio track shown in either Vegas 8 or DVDA 4.5. How could Sony create such an obvious bug?

smokey02 wrote on 10/8/2007, 11:40 PM

I just installed Vegas 8 and am having the same problem. Has anyone reported this to Sony?

jabloomf1230 wrote on 10/10/2007, 3:02 PM

Yes. I reported it several days ago, but I have not yet received a reply. Please note that there is another thread in the Vegas Video forum, where people have been listing bugs and problems. I mentioned this problem and at least one person replied that they were able to get audio with mpg files and Vegas 8. That makes me think that it might be a codec problem.

I have no codec packages installed, but I do have Cyberlink DVD and Nero installed and both of these programs install demuxers and audio decoders, among other things. I checked how my system was rendering mpg files with GraphEdit and I noticed that it was using the MainConcept MPEG2 Splitter to demux the audio (good) and video streams and was using the Cyberlink decoders for audio and video. I changed the merits around for the various demuxers on my system, but that made no difference as to getting an audio stream in Vegas 8.

BirdOPrey5 wrote on 10/12/2007, 12:04 PM

13 days after requesting help from Sony by email with this problem I got an email back apologzing for the lengthy delay - they were very busy it seems - and they asked me to upload a sample veg and mpg file so they can attempt to reproduce the problem.

Fingers crossed.
-Joe

jabloomf1230 wrote on 10/12/2007, 6:32 PM

The person that said that they got an mpg file to show an audio track in Vegas 8, suggested that you recode the mpg file with some other mpg encoders. Then try to import it into Vegas. This is obviously a stopgap solution, since you don't want to make a habit of recoding files too many times.

BirdOPrey5 wrote on 10/15/2007, 9:08 AM

I got a response back today that the problem (according to the Sony tech) is with Main Concept and they have no idea if or when Main Concept will ever fix the problem, but if they do then it will be incorporated into a Vegas patch...

So, if I believe them, it will be a long time, at best, before this is fixed. I can't believe they could release something with such a problem.

jabloomf1230 wrote on 10/16/2007, 12:10 PM

I got the same response. <sigh>

I guess we'll have to wait.

jabloomf1230 wrote on 10/16/2007, 8:42 PM

@BirdofPrey5,

I think I figured out what's happening. If you had previously encoded the mpg file with the standard MPEG-1 Audio Layer II (or even PCM audio for that matter), Vegas 8 will read the mpg file properly and give you both video and audio streams. However, if you encode the mpg file with Dolby Digital 5.1 (for example, with TMPGEnc XPress), Vegas 8 will only give you the video stream if you try to place that file in a Vegas project.

This is why some people can read mpg files with Vegas 8 properly and some can't. If a file won't an produce audio track in Vegas 8, recode it with Nero or TMPGEnc Xpress and use MPEG-1 Audio Layer II for the audio.

I could be wrong, but I experimented a bit and it appears to be correct.

JB

BirdOPrey5 wrote on 10/18/2007, 6:48 AM

Re-encoding probably will work- but it's easier to just use Vegas 7 for the time being. Although I just ordered a computer with Vista so I may have to re-encode anyway.

What Nero are you using? I haven't had Nero since v5 or 6...

Thanks.

BirdOPrey5 wrote on 10/18/2007, 7:16 AM

I saw the 8.0a release this morning and I was crossing my fingers that the issue was fixed- it wasn't, yet.

jabloomf1230 wrote on 10/19/2007, 3:40 PM

I'm using Nero 7, but it's become such bloatware that I barely use it for much these days. It seems kinda silly to not use Dolby Digital for the audio, but that's the only way I could figure out how to get around the problem with Vegas 8.

I also noticed that 8.0a doesn't fix the mpg issue.

3.1415926536 wrote on 10/19/2007, 4:22 PM

Not sure if this will help, but....

I was not able to see/play the audio track from a .mod file captured from a Panasonic camcorder using Vegas 8. Vegas 6 and Windows Media player had no problem.

I contacted Sony support, and they said to change the file extension to .vob instead of .mod. Everything now works just fine.

Hope this can help someone!

jabloomf1230 wrote on 10/20/2007, 5:22 PM

Yes it works. Changing the file extension from mpg to vob allowed Vegas 8 to create both video and audio tracks. This workaround also works for DVDA 4.5. Thanks!!!

BirdOPrey5 wrote on 10/22/2007, 9:27 AM

It works here too!!!

Not a perfect solution but a hell of a lot easier then re-encoding gigs of videos.

I tried renaming the mpg's to a few different extensions when I first noticed the problem (AVI for one) and none of them helped but .vob wasn't one I tried.

Nigel Ward wrote on 10/22/2007, 1:48 PM

Thanks for this.

Upgraded from Vegas Movie Studio 6 to Vegas Pro 8 and the audio track in the mpg files from my DVD recorder would no longer import. Using the vob file extension fixed the problem for me.

BirdOPrey5 wrote on 10/23/2007, 8:10 AM

Since it can be made to work with a file extension change, you'd think Sony could make a quick fix in how mpg files are handled (like- if no audio track is found, do whatever you do for vob files, and if an audio track is found, use it) to the program without having to wait for Main Concept.

jabloomf1230 wrote on 10/24/2007, 5:46 PM

It probably isn't that simple. Vegas and DVDA have a whole host of file I/O plug-ins. It makes sense that the Main Concept plug-in (located in the mcplug folder) is what needs fixing, but there are a number of different dlls in that folder that handle various file operations. If you use a piece of software to list all audio and video codecs on your system, you will see a bunch of Main Concept codecs that correspond to the various dlls in the mcplug folder. For example, mcmpgdmux.dll is probably the wrapper for the codec that demultiplexes the video and audio streams in an mpg file (the Main Concept MPEG demuxer, Version 1.4). This codec is probably the one that isn't working right, but there's no way of really knowing that from our end.

My guess is that Sony just licenses the stuff from Main Concept, so they have to wait until Main Concept provides an update before the bug can be fixed. There is also the possibility that whomever wrote Vegas 8 didn't access the routines in the dll properly. In any case, at least two programming groups wrote the software that's not working, so I can see why it hasn't been fixed yet.

BirdOPrey5 wrote on 10/26/2007, 6:18 AM

Honestly, that sounds like buercratic red tape- this group needs to contact that group and come to a consensus on this before they can do that... Yet we know it can be fixed, easily, from a practical standpoint. Perhaps the VOB files use a different DLL then the MPG but there is working code in there and as someone who programs on and off again as a practical matter this would be an easy fix- doesn't have to be a long time term 'solution' but someone over there, if empowered, could release 8.0a1 tomorrow with this short term fix and by the time the red tape is cleared up, have 8.0d put it back to the way it should have worked behind the scenes.

In the mean time us customers who were coerced into buying the Vegas 8 upgrade early under the premise we'd have to pay full price if we waited could actually put more time into using the software instead of changing file extensions, or worse, re-encoding media.