Rendering HDV, subsequent import problems

athomasl wrote on 12/1/2007, 12:41 PM
I am using Vegas Pro 8.0a. I have a 2-hour HDV project, recorded with a Sony HDR-HC3 camcorder. The video captures to .m2t files just fine, and I can edit .m2t files OK on the timeline in my Project_HDV.veg project. I rendered it to .m2t using the Main Concept MPEG-2 type, with template of HDV-1080-60i. The result looks fine when I view it with Media Player Classic. I haven't tried printing that file to tape yet. I don't anticipate problems there.

If I try to open a new Project_MPG.veg project and place the rendered .m2t file on that, I get red frames in a lot of places. Doesn't matter if I change the project properties to HDV or NTSC DVD. Rendering to M2T or MPG from that gives me gaps in the audio and video where the red frames showed up. The gaps appear in the preview window and in rendered output. I was going to go that route for rendering the MPG file for a DVD, but it looks like that's not an option.

I had some special effects with pan and rotate that didn't come out right if I simply rendered the original Project_HDV.veg file to MPG, but I rendered just those sections to HDV and those clips don't seem to have the red frame problem, so it looks like I can create my final MPG anyway, but I was just wondering if anyone else has seen similar problems importing HDV that was created with the Vegas HDV 1080-60i template. All the video had a color balance filter on it so there should have been no shortcuts taken by the program for the "no recompression" bugs.

Comments

athomasl wrote on 12/2/2007, 10:21 AM
I'm guessing this is all a problem only with Previewing, not rendering. A few more details...

I turned off any Color Balancing and made sure "Enable no-recompression" was turned off to rule those out.

Check Disk revealed no errors in the source HDV from the camera, but nonetheless I moved everything to another hard drive and still had problems.

I started a new HDV project and put only one video event on the timeline containing a 10-second clip where I had seen trouble.

I render that to HDV and the result looks fine with Media Player Classic. If I import that m2t file, the Preview window has some black frames in the video.

If I ignore that and just subsequently render that clip to an mpg file or yet another m2t file , I don't detect any problems in the output.

I'm guessing that the code which reads m2t files and prepares it for quick Previewing is having some kind of buffering trouble with that clip, but in the real render that code probably isn't being used.

What exactly is wrong when I see a red frame?

It looks like they don't always appear where there's a Preview problem. Looking more closely at one quick frame where I see black in the Preview window, I actually see a normal thumbnail on the timeline.

Anyway, back to work for me...
Bill Ravens wrote on 12/2/2007, 1:00 PM
I'm having the same problems with m2t files obtained DTE with a Jvc hd110.
Converting the m2t files to CFHD with HDLink beforehand yields complete avi files with no black frames. It appears Vegas is choking on some of the m2t's.