Vegas Pro 10d Print to HDV tape

Studio Works wrote on 6/27/2011, 2:41 PM
We are outputting some "MTS" files with Fast Motion to HDV tape. (a car driving in front of the camera at 25+ mph)

The problem comes once the file is printed to tape the Vehicle in the scene will move backwards 1 frame about every 5th frame, as the vehicle passed through the frame.

Playback from the MTS file in Vegas the motion is correct, But once outputted to tape we get the back step motion.

when the vehicle is further away from the camera the issue is non existent. I guess the motion isn't as fast and the HDV compression can keep up.

Any thoughts on how to correct this?

Comments

NickHope wrote on 6/27/2011, 9:26 PM
Strange. What's the format of the source footage exactly? Does the framerate match your output HDV framerate? Are you rendering and writing to tape all in one process? Maybe try rendering to the HDV format first and check that on the timeline before writing to tape. Or maybe try rendering to a lossless intraframe intermediate file first (e.g. Lagarith or uncompressed .avi) then to HDV.
farss wrote on 6/28/2011, 5:30 AM
Hm, the only way to print HDV to tape is to render it first. I think if Vegas detect anything other than a completely compatible contiguous file on the T/L it'll render it first.
So, you might as well render it, check it and then print it to tape with no further rendering involved.

Bob.
johnmeyer wrote on 6/28/2011, 9:14 AM
Sounds a little like a field reversal problem. Could also be a frame drop issue.

Things to check:

1. Make sure the project properties match your source footage. Use the "match media settings" button within the Project Properties dialog to ensure that this is so.

2. While in the project properties, make sure that "Deinterlace Method" is NOT set to "none." If it is, very bad things will happen.

3. Try rendering to HDV first, and then printing that file to tape. This should get you to the same place as using the "Print Video to HDV Tape" and then letting Vegas render first and then print, but it gives you a chance to view the resulting HDV file and see if the problem is in that file, or if there is something going on in the print to HDV operation.

4. Make sure the Preview quality is set to "Best Full" and check the original files on the timeline to see if there is any discontinuity or other issue you see. Sometimes very small discontinuities in the original video get magnified when rendered to other formats.
R0cky wrote on 6/28/2011, 9:21 AM
If this was shot 24 PSF and also had a frame order problem would it do this? The 5 frame thing sounds like a pulldown issue.

rocky
Studio Works wrote on 6/29/2011, 9:45 AM
Doing some test renders I don't see the problem in the file, I am going to try to play the file off the camera and record it directly onto HDV tape bypassing Vegas, and see what happens.
Studio Works wrote on 6/30/2011, 8:33 AM
Did test renders and making an file with VBR Encoding, 2 pass and it seemed to do well. Did a full render on the 40 minutes of footage, and played it back and this time it would double frames.

Printing to tape anyway, and well check the results.
johnmeyer wrote on 6/30/2011, 1:06 PM
I would recommend using the "HDV 1080-60i" MPEG-2 template, and not changing anything. Printing to tape is a pretty tightly-controlled operation, and anything you try to send that is not "in spec" may cause a problem.