burn 24p dvd from timeline

Ian E Pearson wrote on 9/10/2012, 9:43 AM

I needed to burn a dvd really fast without using my typical overly complex external encoder workflow, so I remembered that you can burn from timeline. Wow, it has just the preset I need! 24p 720x480 16x9! Great!

EXCEPT, as it was rendering I noticed weird motion artifacts, and realized it was rendering all my 23.976 footage at true 24p and it messed up every frame. That's weird because every 24p DVD is actually 23.976 so there's no reason for that. It would have been better to just render a 60i that way it would have just added pulldown instead of resampling every frame. What a wasted poorly implemented feature.

Unless someone out there knows a setting I can change?

At least I know for the future now.

Comments

musicvid10 wrote on 9/10/2012, 10:16 AM

The legal DVD spec is 25fps PAL or 29.970 NTSC.

Anything else, including 23.976 IVTC must be telecined, either hard or soft, to one of those standards.

The Vegas 24p preset telecines the footage to one of the specified standards.

Some PAL producers simply speed the footage up to 25 fps and let it run a little faster. You would disable resample if that's what you want to do.

Ian E Pearson wrote on 9/10/2012, 6:04 PM

"The Vegas 24p preset telecines the footage to one of the specified standards."

That's not what it does when burning from the timeline using the 24p preset. If that were the case then the 24p and the 60i preset would have the exact same results.

I can see it rendering with a 24.00 fps while its burning which is wrong. and i can see weird frame blending.

musicvid10 wrote on 9/10/2012, 7:19 PM

There are two kinds of telecine: Hard telecine adds/interpolates fields to fit the cadence. Soft telecine preserves true 24p but adds flags to tell the player to add the "missing" frames for legal playback on non-hdmi devices. Since I don't burn DVDs direct from the timeline, I can't tell you which it does or if it is different than rendering.

One thing you can try is "Disable Resample." That should tell Vegas just to duplicate the 24th frame for a PAL project. Shouldn't look too bad.
NTSC, however, is a completely different ballgame, since some method must be employed to "manufacture" six frames every second! 3-2 pulldown is the most common hard telecine method. Experiment.