Track Motion + removing media at end causes empty rendering

John-Callahan wrote on 1/6/2026, 7:03 AM

I made a project with a lot of media and several tracks, which was over 1.5 hours long. I used Track Motion (3D) to superimpose a video into a location on another track. As the project was quite complex I decided to break it up into 3 projects. On rendering of my first part project (part 1) I noticed the rendered video was the same length as my original full project (1:34:19). I checked that there was no left over media in my shorted project and there is none. However, I notice the keyframe position bar still shows up to the old project length. I have tried entering the Track Motion dialog, but do not see anyway to shorten the old length.

Shorted project showing all media and keyframe markers

If I press CRTL+End in the timeline area it jumps to the old end

I realize I can simply create a loop region and use that to render the area I want, but this means I have to consciencely doo this each time in each of my new shorted projects (part 1 to 3). I was hoping for a way to fix my project to be only within the limits of available media.

Comments

3POINT wrote on 1/6/2026, 7:09 AM

Look also for a trackmotion keyframe that maybe overlooked at the end.

John-Callahan wrote on 1/6/2026, 7:38 AM

I already did that. Here are a few things I notice in the track motion UI and the tools in it:

Track Motion timeline - Last keyframe is at ~4min mark

Click on Last Keyframe button

Notice the cursor position goes to end, but no keyframe marker is there

Press Delete Keyframe button as a test

Click on Last Keyframe button again

So, it appears to remove some end information in the timeline. However, this does NOT fix it. If I exit the UI and go back into it again and click the Last Keyframe button, then it goes to the 1:34:19 point again

Gid wrote on 1/6/2026, 8:16 AM

..... I checked that there was no left over media in my shorted project and there is none.

@John-Callahan Did you zoom right in at the 1:34:19 point to check there isn't a frame or partial frame left at the end.?

DMT3 wrote on 1/6/2026, 8:18 AM

I know you have checked, but ZOOM in as far as you can on the timeline where you cursor says it is the end. I have been caught by having just a sliver of media but could not see it until it was zoomed a long way in.

Gid beat me to it.

John-Callahan wrote on 1/6/2026, 8:52 AM

@Gid & @DMT3 - I did that originally to no affect. I used a window in what appeared to be the old empty area and pressed delete and still had the issue. However, I revisited it and saw what appeared to be a extra line (vertical) drawn on the timeline:

It turns out to be 2 frames from an old clip

So, the solution was as you mentioned. It just got lost in the scale of thins