How do I extend back in time?

Help/How To
1

I have a 4 hour .mov (A in the pic), I trimmed it to start at 03:37:57.190, put it on the time line. I put 5 more clips on a 2nd video track (B). I synced up A and B (you can see the audio matches)

Now I realize I want A to start at 03:37:45:00

I expected to be able to grab the left side of A and drag it, but it just moves all of A. The mouse cursor changes and the edge turns green, but the behaviour is the same as if I grab the clip in the middle and move it.

If I grab the right side of C, it turns red and I can extend it (change the duration)

(this image is constructed so you can see all the things I am talking about, like what mouse icon I get when I am over the left edge)

sc1a.png828×374 49 KB

2

It works for me the way you want it to (adjust in point of A, not move it). Maybe you were able to somehow trick it into behavior you observed, but I do not know how.

3

Oh look, you are right.

I think there is a bug: when I drag, the UI shows the audio moving. Which made me freak out and exit thinking I had just unsynced things.

Now I see when I let go of the mouse, the audio jumps back to its correct position.

Do you want me to file a bug against this, and/or do you want a 5 sec video of the problem?

4

This is intentional right now because redrawing the waveform to expose new portions (makes it appear static on timeline) is too compute intensive and interferes with the interactivity while drag-trimming. I do not consider it a defect, just a UX shortcoming.

5

I can understand that.

I just checked, and dragging the right hand edge does draw the waveform in the new area. (Red/C in my pic) Maybe because it is harder to go backwards 1 frame?

How about disabling the waveform when drag starts, restore it when the drag is done?