View Full Version : Timeline leaves gap or forces cross fade


Mike Hammond
October 27th, 2011, 12:54 PM
Hi everyone,

Here's something that's been bothering me for a while. It's never been a real issue and I can work around it, so it's really more about satisfying my curiosity. It seems that lately my video pieces on the timeline end up with tiny gaps between them (see first jpeg) even after I've put them together with "Snap" enabled. They'll start off right against each other but then they'll end up with tiny gaps once I start moving stuff arounf - and still with automatic snapping enabled. If I try to get them closer they crossfade. There doesn't seem to be an in-between and the gap isn't even a frames worth. But if not caught, my rendered video has a superquick black "flash" because of a gap I didn't catch.

Like I said, it's not usually an issue and more often than not I catch the gap. Where it does create problems is when a clip has a fade out on it, and then the following clip has a fade in. If I butt them up against each other the fades are automatically removed because now the two clips are overlapping (as in second jpeg). The solution is to just zoom into the timeline and get the clips as close as possible without causing an overlap.

Am I explaining this in a way that makes sense? And ideas on what may be causing this?

Thanks!

Edward Troxel
October 27th, 2011, 01:22 PM
It's because your event on the left did NOT end on a frame boundary. Shorten it to end on a frame boundary and all will be fine.

Mike Kujbida
October 27th, 2011, 01:51 PM
Make sure "Quantize to Frames" is enabled.

David Jimerson
October 27th, 2011, 02:30 PM
This happens (most often) when your footage frame rate does not match your timeline frame rate. Check the tiny, down-pointing black arrows in your clips -- these are indicators of frame boundaries. You'll most likely see that they don't all line up with timeline frame lines.

It can also happen if, as Mike says above, you don't have "Quantize to frames" enabled.

Edward Troxel
October 28th, 2011, 09:08 AM
It can happen with Quantize to Frames turned on. I've, many times, seen a video clip not be exact frames long. If you just grab then end, resize it a frame smaller and then bring it back, it will then stop at the frame boundary. In this case, it looks like it's going 17 1/2 frames past the second mark. Pull it back to 17 frames and all will work fine.

Mike Kujbida
October 28th, 2011, 10:36 AM
It can happen with Quantize to Frames turned on.

You are correct Edward.
It's happened to me a few times and using your method has always saved the day as I never work with QTF mode turned off.

Mike Hammond
October 28th, 2011, 02:18 PM
Thanks for the replies guys. Definitely an issue with frame rate not matching project properties. All fixed!

David Jimerson
October 28th, 2011, 09:42 PM
Yeah, it definitely can happen with QTF turned on, when the clip frame rate doesn't (exactly!) match the timeline. Just saying, when it's turned off, wild stuff can happen.

One thing especially to watch for is correcting for this when you have ripple edits enabled. If you correct a clip with ripple on, all the ripple-affected clips will then be displaced by the amount of the error -- as in, if the clip you correct is 13 frames past the frame line, and then you correct it with ripple on, all rippled clips will become 13 frames off.