Vegas won't recognize audio in DV AVI file at DVinfo.net

Robert Knecht Schmidt · January 31st, 2007, 06:28 PM

I captured three DV clips to AVI files, all using the same device, hardware, and capture program (AMCap from the Programming DirectShow book CD).

File1.avi = 2.71 GB
File2.avi = 2.56 GB
File3.avi = 1.93 GB

All three files play fine in Windows Media Player. File1.avi and File3.avi import into Vegas 7 just fine. Try to drag File2.avi to the timeline, though, and only the video track comes up. No matter what I do, I can't get Vegas to recognize the audio. What's going on here?

Perhaps the problem is File2's size. It's bigger than the others. But here's the shocker. I also captured other files in the same batch... and

File4.avi = 5.73 GB

Guess what--no problems with File4.

Anybody have any ideas?

John Miller · January 31st, 2007, 08:13 PM

Are they Type-1 or Type-2 DV AVIs?

What audio format are they? 32k-2ch, 44.1k or 48k?

Robert Knecht Schmidt · February 1st, 2007, 10:21 AM

Type 1 or Type 2--I'm at a loss as to how to tell. Any easy ways without downloading other software?

I think they're 48 k audio, but again, is there any surefire way to find out?

Edward Troxel · February 1st, 2007, 10:28 AM

My first guess would be that they aren't really DV-AVI. What kind of "device" are you capturing from (all using the same device, hardware, and capture program)? And why use "AMCap" instead of capture apps that are known to work like Vegas VidCap or Scenalyzer Live over a standard firewire port?

Douglas Spotted Eagle · February 1st, 2007, 10:30 AM

Quote:

Originally Posted by Robert Knecht Schmidt

Type 1 or Type 2--I'm at a loss as to how to tell. Any easy ways without downloading other software?

I think they're 48 k audio, but again, is there any surefire way to find out?

Gspot is the best way, but you can also look at the properties in Vegas.
Why are you not using Vidcap, which is a known quantity?

Robert Knecht Schmidt · February 2nd, 2007, 07:21 AM

Quote:

Originally Posted by Douglas Spotted Eagle

...you can also look at the properties in Vegas.

I can't find any way to determine, in Vegas, whether a file is Type 1 or Type 2 AVI. The only field I can find in the file properties is "Format: DV".

The file was captured from MiniDV tape in my JVC dual deck through firewire into a built-in OHCI port on my computer.

It sounds like the only suggestion I'm hearing is to recapture the file using a different capture program.

Guy Bruner · February 2nd, 2007, 07:43 AM

You never mentioned if you are using Firewire or USB. If you are using USB, you probably are using DirectShow filters because Video for Windows never addressed capturing video over USB originally. Some software vendors incorporate both Type 1 and Type 2 AVI capture in their DirectShow filters over USB so that older VfW applications like Vegas will have the proxy audio file they need. Capturing using Vegas's Vidcap.exe over USB will result in no audio, just like the problem you currently have, I believe because it uses VfW filters (ergo, no Type 1 AVI audio support). Your best route to success is to capture over Firewire using a capture software that supports Type 2 AVI files...vidcap.exe, Scenalyzer Live, WinDV, CaptureFlux...etc.

What I have found about Type 1 AVIs is that Vegas will sometimes import them and will create a proxy audio file. It will tell you when it is doing this. You can try using File/Import/Media instead of dragging the clips to the timeline and see if that triggers creating the proxy audio. I rarely deal with Type 1 AVIs so I have only seen this work a few times, and it may not work for you, but it's worth a try.

Robert Knecht Schmidt · February 2nd, 2007, 07:57 AM

Quote:

Originally Posted by Guy Bruner

You never mentioned if you are using Firewire or USB.

Quote:

Originally Posted by Robert K S

The file was captured from MiniDV tape in my JVC dual deck through firewire into a built-in OHCI port on my computer.

Quote:

Originally Posted by Guy Bruner

If you are using USB, you probably are using DirectShow filters because Video for Windows never addressed capturing video over USB originally.

I was almost certainly using DirectShow filters since the capture program I used was a sample program that came with a book on programming DirectShow. (And over firewire, not USB.)

Quote:

Originally Posted by Guy Bruner

What I have found about Type 1 AVIs is that Vegas will sometimes import them and will create a proxy audio file.

For all the files that import successfully with audio (mentioned in my first post), Vegas created audio proxies. Interestingly, it did so in two passes, even though just one file was imported.

Guy Bruner · February 2nd, 2007, 08:13 AM

Ok, I apologize for not reading your posts carefully. DirectShow creates Type 1 AVIs and, unless the software writer specifically codes for Type 2, the software will not create a Type 2 AVI. Vegas prefers Type 2 which is why it creates a proxy audio file when it encounters Type 1. For some reason, it didn't create the proxy for the file you are having problems with. You can avoid all this by capturing to Type 2 originally.

Robert Knecht Schmidt · February 2nd, 2007, 09:00 AM

Thanks for the helpful reply--that does answer some questions. Though I'm still not sure how to diagnose whether an AVI file is Type 1 or Type 2 after-the-fact.

There's one thing I can't figure out how to do in Vegas Capture: seamless capture a stretch of a tape without setting in and out points first. Basically I just want to pop the tape in, queue it up myself to the in point, hit play, hit capture, and then stop capture when the tape reaches my preferred out point.

Does Vegas Capture not have this capability?

Guy Bruner · February 2nd, 2007, 09:07 AM

You need a file utility like AVICodec or GSpot to read the file metadata.

Sure Vegas allows capturing manually. Just use the camcorder controls in Vidcap.exe to position the video where you want it and press record. Press pause when you have captured all the video you want.

Robert Knecht Schmidt · February 2nd, 2007, 09:15 AM

Quote:

Originally Posted by Guy Bruner

Sure Vegas allows capturing manually. Just use the camcorder controls in Vidcap.exe to position the video where you want it and press record. Press pause when you have captured all the video you want.

Please forgive me if I'm misunderstanding your instructions, but I think I tried that, and Vegas Capture broke up my video into separate clips. I don't want it to do this--I want to seamless capture a single file from my tape. Is there an option to do so?

Mike Kujbida · February 2nd, 2007, 09:48 AM

Turn off scene detection in the preferences in Vidcap and it'll be one continuous capture.

Robert Knecht Schmidt · February 5th, 2007, 10:50 PM

Ah, it was in the preferences. Thanks so much!

January 31st, 2007, 06:28 PM	#1
Robert Knecht Schmidt Wrangler Join Date: Feb 2002 Location: Cleveland, Ohio Posts: 1,933	Vegas won't recognize audio in DV AVI file I captured three DV clips to AVI files, all using the same device, hardware, and capture program (AMCap from the Programming DirectShow book CD). File1.avi = 2.71 GB File2.avi = 2.56 GB File3.avi = 1.93 GB All three files play fine in Windows Media Player. File1.avi and File3.avi import into Vegas 7 just fine. Try to drag File2.avi to the timeline, though, and only the video track comes up. No matter what I do, I can't get Vegas to recognize the audio. What's going on here? Perhaps the problem is File2's size. It's bigger than the others. But here's the shocker. I also captured other files in the same batch... and File4.avi = 5.73 GB Guess what--no problems with File4. Anybody have any ideas? __________________ All the best, Robert K S Search DVinfo.net for quick answers \| The best in the business: DVinfo.net sponsors

February 1st, 2007, 10:21 AM	#3
Robert Knecht Schmidt Wrangler Join Date: Feb 2002 Location: Cleveland, Ohio Posts: 1,933	Type 1 or Type 2--I'm at a loss as to how to tell. Any easy ways without downloading other software? I think they're 48 k audio, but again, is there any surefire way to find out? __________________ All the best, Robert K S Search DVinfo.net for quick answers \| The best in the business: DVinfo.net sponsors

February 1st, 2007, 10:28 AM	#4
Edward Troxel Sponsor: JET DV Join Date: Dec 2001 Location: Southern Illinois Posts: 7,953	My first guess would be that they aren't really DV-AVI. What kind of "device" are you capturing from (all using the same device, hardware, and capture program)? And why use "AMCap" instead of capture apps that are known to work like Vegas VidCap or Scenalyzer Live over a standard firewire port? __________________ Edward Troxel [SCVU] JETDV Scripts/Scripting Tutorials/Excalibur/Montage Magic/Newsletters

February 2nd, 2007, 09:00 AM	#10
Robert Knecht Schmidt Wrangler Join Date: Feb 2002 Location: Cleveland, Ohio Posts: 1,933	Thanks for the helpful reply--that does answer some questions. Though I'm still not sure how to diagnose whether an AVI file is Type 1 or Type 2 after-the-fact. There's one thing I can't figure out how to do in Vegas Capture: seamless capture a stretch of a tape without setting in and out points first. Basically I just want to pop the tape in, queue it up myself to the in point, hit play, hit capture, and then stop capture when the tape reaches my preferred out point. Does Vegas Capture not have this capability? __________________ All the best, Robert K S Search DVinfo.net for quick answers \| The best in the business: DVinfo.net sponsors

February 5th, 2007, 10:50 PM	#14
Robert Knecht Schmidt Wrangler Join Date: Feb 2002 Location: Cleveland, Ohio Posts: 1,933	Ah, it was in the preferences. Thanks so much! __________________ All the best, Robert K S Search DVinfo.net for quick answers \| The best in the business: DVinfo.net sponsors

January 31st, 2007, 08:13 PM	#2
John Miller Major Player Join Date: Oct 2005 Location: Hillsborough, NC, USA Posts: 968	Are they Type-1 or Type-2 DV AVIs? What audio format are they? 32k-2ch, 44.1k or 48k?

February 2nd, 2007, 07:43 AM	#7
Guy Bruner Major Player Join Date: Nov 2003 Location: Ashford, AL Posts: 937	You never mentioned if you are using Firewire or USB. If you are using USB, you probably are using DirectShow filters because Video for Windows never addressed capturing video over USB originally. Some software vendors incorporate both Type 1 and Type 2 AVI capture in their DirectShow filters over USB so that older VfW applications like Vegas will have the proxy audio file they need. Capturing using Vegas's Vidcap.exe over USB will result in no audio, just like the problem you currently have, I believe because it uses VfW filters (ergo, no Type 1 AVI audio support). Your best route to success is to capture over Firewire using a capture software that supports Type 2 AVI files...vidcap.exe, Scenalyzer Live, WinDV, CaptureFlux...etc. What I have found about Type 1 AVIs is that Vegas will sometimes import them and will create a proxy audio file. It will tell you when it is doing this. You can try using File/Import/Media instead of dragging the clips to the timeline and see if that triggers creating the proxy audio. I rarely deal with Type 1 AVIs so I have only seen this work a few times, and it may not work for you, but it's worth a try.

February 2nd, 2007, 08:13 AM	#9
Guy Bruner Major Player Join Date: Nov 2003 Location: Ashford, AL Posts: 937	Ok, I apologize for not reading your posts carefully. DirectShow creates Type 1 AVIs and, unless the software writer specifically codes for Type 2, the software will not create a Type 2 AVI. Vegas prefers Type 2 which is why it creates a proxy audio file when it encounters Type 1. For some reason, it didn't create the proxy for the file you are having problems with. You can avoid all this by capturing to Type 2 originally.

February 2nd, 2007, 09:07 AM	#11
Guy Bruner Major Player Join Date: Nov 2003 Location: Ashford, AL Posts: 937	You need a file utility like AVICodec or GSpot to read the file metadata. Sure Vegas allows capturing manually. Just use the camcorder controls in Vidcap.exe to position the video where you want it and press record. Press pause when you have captured all the video you want.

February 2nd, 2007, 09:48 AM	#13
Mike Kujbida Inner Circle Join Date: May 2005 Location: Windsor, ON Canada Posts: 2,770	Turn off scene detection in the preferences in Vidcap and it'll be one continuous capture.