Reversing Interlaced Video

lcalcada wrote on 9/10/2004, 11:12 AM

Hi Folks,

I'm having an odd editing interlaced DV video in Vegas 5. The video is Bottom Field First and so is the project, but when I reverse a clip, no matter it's made by velocity envelope or by the reverse option, the field order of the reversed part becomes Top Field First, and the output gets messed up. I know I can deinterlace, or even manually reverse and keep the field order in an external processing program like Avisynth, but I thought Vegas should deal with it, shouldn't it? The fact is that the reversed section of the clip looks very very jerky on TV, no matter it's printed to tape or exported to MPEG, which shows that Vegas is outputting this part of the video as TFF. Any sugestions?

Comments

johnmeyer wrote on 9/10/2004, 11:53 AM

I thought this bug had been fixed in Vegas 5. Apparently not.

Sony, any comment?

Here is a link to one of several discussions about this problem, along with a workaround I discovered that will let you proceed with your project.

Velocity envelope bug CONFIRMED

lcalcada wrote on 9/10/2004, 4:18 PM

Thanks for the workaround. I'm gonna try the supersampling thing before, cause it's a lot easier for me to reverse the clip in Avisynth while keeping the field order without any nasting frame blending Vegas is so fond of.

johnmeyer wrote on 9/10/2004, 6:43 PM

BTW, if you don't know, you can use the Wax plugin in to read AVISynth script directly into Vegas. I described my technique here:

Wax Import AVISynth

It has a few limitations, which I also note in the above link.