Renderding DV format questions

spidy2167 wrote on 7/16/2004, 9:12 AM
I’m working on a project that goes something like this:
1. Capture from my DV camcorder in standard format
2. I did some editing, cuts, color correcting and made regions of all the clips.
3. Rendered out the project to these settings. Save as type: Video for Windows AVI, Default template: NTSC DV, checked Save project markers in media, and made sure that best was selected and all else is at default settings.
I rendered the project, and then bring in the rendered avi to the time line and view the regioned clips. I have noticed that the regions have shifted from there original spots. The regions are no longer at cuts that I saved them on.
I have deleted the original DV files so I can’t go back and correct this and I have done 4 tapes like this not knowing that this was happening.

I have since found out that I could correct this by rendering the DV to:
Video for Windows AVI, Default template: Template (uncompressed), save project markers in media. Project set to best. Under the video tab I set the video format to NTSC DV and left all else at the default settings.
I rendered out the project, brought in the rendered project to the timeline and viewed the region clips and everything was fine.

First question, does this sound right the way I did this the second way? I have done this the first way in Vegas 4 and I didn’t have a problem like I had in Vegas 5.

Second question, if I bring in the already rendered avi file with the incorrect region markers, move the markers in the trimmer, save it and rerendered it the second way of rendering that will save the region markers in the correct spots, Will I lose any quality of any significant?

Third question, if there a better method to render out a DV file to a DV avi file that will have the least quality loss. I don’t want to use the straight uncompressed setting, because it makes a huge file size and I don’t have that kind of room for all the tape that I have to edit.

Thanks for your help.


Comments

Chienworks wrote on 7/16/2004, 11:23 AM
I'm not sure about the markers & regions issues. However, if you render DV -> DV with no filters, titles, composites, transitions, filters, etc. then there is absolutely no quality loss. The video frames are simply copied bit for bit without any actual rendering going on.
Liam_Vegas wrote on 7/16/2004, 12:27 PM
If you need to set regions in a clip you can do that direct in the trimmer and save those regions into the original AVI file without even needing to render.


In your case of course I see you did some other things to the clip (color correction and so on) in which case I can understand why you rendered. In any case as long as you have the original VEG file you used to render that AVI file you can re-load the AVI into the veg (into tracks above the original ones) and you can then do a straight render again. Make sure you "mute" all the old tracks and because you are doing no FX's or anything to this video it will be bit-copied with zero quality loss. That will (should) place the region markers into the AVI file.

You should NEVER need to render to the AVI Uncompressed format if your source format is DV and your final format will be DV also. The fact you lost your regions (or they ended upo somewhere else) is either a BUG or something else happened to cause that.