Position keyframes ignored?

VanLazarus wrote on 9/16/2005, 1:58 AM
I have a 45 second clip which I have painfully stabilized by changing the position keyframe for every frame. When I preview it, everything looks great..... but when I render it out, it seems my keyframes have been ignored and the video seems to be just as jumpy as the original.

I have a velocity envelope on the clip that is speeding it up 300% and another track with a feathered mask overlayed on top of the clip in question.

Any ideas what is going wrong?

Comments

VanLazarus wrote on 9/16/2005, 2:24 AM
Weird....

This problem only happens when I render the clip in question as a MPG. When I render it as an AVI, the problem goes away.

A work-around I used was to pre-render the accelerated, stabilized clip as an AVI and then drop that pre-processed clip into the same place as the old one. Problem solved.... but can anyone explain why rendering it as an MPG would cause keyframes to be ignored.

PS. It didn't matter if "disable resample" was set for the clip or not.

VanLazarus wrote on 10/5/2005, 2:02 PM
Is this a bug that Sony is aware of? How can I inform them?
Angels wrote on 10/6/2005, 12:38 PM

I suspect a bug: I'm experiencing exactly the same problem: playback of position keyframes info during editing is fine but in the output playback of a rendered MPEG, the position keyframes are wrong.

I'm going to try rendering to an AVI to see if it's ok.

A
Angels wrote on 10/6/2005, 2:25 PM

Well this is interesting: there was some framing confusion between parent and child tracks which I corrected blind, since the video preview didn't show it. After the correction, the mpeg was fine.

However, I also noticed that my video display was in "Simulate Device Aspect Ratio" enabled, which set the display at an innacurate proportion.

After clearing both of these issues, the mpeg output was fine, so I guess: definitely some weirdness that could be caused by ignorance at my end..

A
Grazie wrote on 10/6/2005, 11:13 PM
Very interesting indeed. Why should a "simulate" in a Previewing function actually affect an encode function? Preview > Encode? Hmmm... I guess somebody will explain this.

Grazie
farss wrote on 10/7/2005, 12:27 AM
Not a clue down here and unless you have SDA on then what you see is wrong, just try it wiith 16:9 footage.
Bob.