Comments

Spot|DSE wrote on 7/11/2005, 5:41 PM
Yes, Vegas can do IVTC, or remove pulldown. Right click the media that is 24fps, and in properties, choose "Remove Pulldown" you also should visit Options/Prefs, and be sure the 'automatically remove pulldown' box is checked.
Search for "Remove Pulldown" in the Vegas help file, you'll get quite a lot of information.
Grazie wrote on 7/12/2005, 2:40 AM
Will somebody please explain, "Inverse Telecine" - I'm lost - help! Grazie
johnmeyer wrote on 7/12/2005, 7:59 AM
Has anyone actually used Vegas to do inverse telecine? I tried it several times and was never able to get it to do what I expected. Most video that originated on film and was then transferred to NTSC 29.976 by inserting duplicate frames and fields does not follow the "cadence" of repeated frames exactly. This is especially true at scene changes. Removing pulldown (i.e., "inverse telecine") therefore requires some reasonably sophisticated algorithms that can actually figure out the correct cadence in the first place (i.e., which frames and fields are duplicated) and then can also sense when the pulldown pattern has changed.

Does Vegas really have this? Like I said, I've never been able to 29.976 video and recover the original 24 fps progressive frames using Vegas. I have done it with TMPGEnc, with filters in VirtualDub and, the best way of all, using some marvelous filters in AVISynth.
farss wrote on 7/12/2005, 8:24 AM
I doubt Vegas is that smart, I think it needs real 24p or 24pA material that's got correct cadence to do that.
But I've learned something, if those tools are smart enough to do the job properly then they could come in handy at times.
Matt_Reason wrote on 7/12/2005, 12:05 PM
Thanks Spot,

I also found it in the Render As dialog. When you choose the frame rate, there's a IVTC at the 23.96 frame rate.

Vegas 6 did a better job than Vegas 5 on it.

At the post house I'm working at, we use a machine made by TeraNex to clean the cadence of the 29.97 footage that was originally film. The footage goes through it on capture - before it hits the hard drive. The TeraNex prepares the footage for Inverse Telecine and its real magic is that it knows to insert frames at scene changes so the inverse telecine will be perfect.

Matt
Matt_Reason wrote on 7/12/2005, 12:09 PM


BTW, I realize for those who don't understand Inverse Telecine, reading this thread really won't help. It's complex and hard to visualize.

When I started at this post house, I had no idea what it was. A colleage suggested this book and it has really been worth the money. It really explains a lot of concepts in simple terms. I highly recomend it.
johnmeyer wrote on 7/13/2005, 8:12 AM
Some additional material:

Inverse Telecine 1

Pulldown