Vegas wont build peaks for 85 minute .m2t captures at DVinfo.net

Tony Spring · August 12th, 2007, 01:43 AM

I'm using version 7d and capturing 85 minute hdv tapes as a single .m2t file, but when I import the media into vegas the audio peaks stop building at 73%. If I convert to cineform intermediate files it works ok but cineform files are too big and timeline performance isn't as good as using .m2t.

John Cline · August 12th, 2007, 01:04 PM

Vegas is pretty touchy about the tiniest of errors in an .M2T file. I just run the file through a piece of freeware called "Mpeg2Repair" and the problem files load into Vegas just fine. You can get it here:

http://www.videohelp.com/tools/MPEG2Repair

John

Tony Spring · August 13th, 2007, 02:00 AM

Quote:

Originally Posted by John Cline

Vegas is pretty touchy about the tiniest of errors in an .M2T file. I just run the file through a piece of freeware called "Mpeg2Repair" and the problem files load into Vegas just fine. You can get it here:

http://www.videohelp.com/tools/MPEG2Repair

John

Thanks for the link John I'll give it a try..

Laurence Kingston · August 13th, 2007, 09:29 AM

I have been using Womble Mpeg VCR to do this fix. The only problem with the files fixed by the Womble program is that they preview inefficiently on the Vegas timeline after the fix. Is Mpeg2Repair any better in this regard?

Laurence Kingston · August 13th, 2007, 09:45 AM

OK, I tried it out for myself. The answer is that clips fixed with Mpeg2Repair also have the same slow Vegas preview problems as they do when you do the repair with one of the Womble programs. On the bright side, Mpeg2Repair is free and a slow preview on fixed clips is way better than having Vegas crash all the time.

By the way, I have been told that if you use the real higher quality (and way more expensive) HDV tapes rather than regular DV tapes you won't run into these mpeg error problems, but I am way to cheap to try this.

Richard Iredale · August 14th, 2007, 11:18 AM

Your friend has the facts a bit skewed.

The only real weakness of the HDV format, in my opinion, is that it uses MPEG2 as the delivery codec and a 15-frame GOP. What this means is that a single dropout on the tape will cause a 1/2 second freeze of video and audio, a significant problem when contrasted with a smallish "glitch" in DV mode.

People buy the more-expensive HDV tapes because those tapes have been certified as having fewer dropouts. But it's all relative. I've recently switched tape brands and am now using the blue Sony PRL tapes. In 40 tapes I have not yet seen a single dropout.

August 12th, 2007, 01:43 AM	#1
Tony Spring Regular Crew Join Date: Nov 2006 Location: london UK Posts: 170	Vegas wont build peaks for 85 minute .m2t captures I'm using version 7d and capturing 85 minute hdv tapes as a single .m2t file, but when I import the media into vegas the audio peaks stop building at 73%. If I convert to cineform intermediate files it works ok but cineform files are too big and timeline performance isn't as good as using .m2t. __________________ www.springproductions.co.uk

August 12th, 2007, 01:04 PM	#2
John Cline Major Player Join Date: Oct 2002 Location: Albuquerque, New Mexico USA Posts: 333	Vegas is pretty touchy about the tiniest of errors in an .M2T file. I just run the file through a piece of freeware called "Mpeg2Repair" and the problem files load into Vegas just fine. You can get it here: http://www.videohelp.com/tools/MPEG2Repair John

August 13th, 2007, 09:29 AM	#4
Laurence Kingston Major Player Join Date: Aug 2004 Location: Clermont, FL. Posts: 941	I have been using Womble Mpeg VCR to do this fix. The only problem with the files fixed by the Womble program is that they preview inefficiently on the Vegas timeline after the fix. Is Mpeg2Repair any better in this regard?

August 13th, 2007, 09:45 AM	#5
Laurence Kingston Major Player Join Date: Aug 2004 Location: Clermont, FL. Posts: 941	OK, I tried it out for myself. The answer is that clips fixed with Mpeg2Repair also have the same slow Vegas preview problems as they do when you do the repair with one of the Womble programs. On the bright side, Mpeg2Repair is free and a slow preview on fixed clips is way better than having Vegas crash all the time. By the way, I have been told that if you use the real higher quality (and way more expensive) HDV tapes rather than regular DV tapes you won't run into these mpeg error problems, but I am way to cheap to try this.

August 14th, 2007, 11:18 AM	#6
Richard Iredale Regular Crew Join Date: Dec 2003 Location: Portland, OR Posts: 67	Your friend has the facts a bit skewed. The only real weakness of the HDV format, in my opinion, is that it uses MPEG2 as the delivery codec and a 15-frame GOP. What this means is that a single dropout on the tape will cause a 1/2 second freeze of video and audio, a significant problem when contrasted with a smallish "glitch" in DV mode. People buy the more-expensive HDV tapes because those tapes have been certified as having fewer dropouts. But it's all relative. I've recently switched tape brands and am now using the blue Sony PRL tapes. In 40 tapes I have not yet seen a single dropout.