Speed example

[Ertan]

Hello guys,

I want to speed up the video from 5th to 10th seconds. other parts will be at normal speed. I tried a few times, but it didn’t work. Could you help ?

• And why are the parentheses not active?

[Elusien]

The way I would do it is this:

1. Have your video clip on V1.
2. Duplicate it and copy it to V2 so the 2 clips are in sync.
3. Split the V2 clip at 10 seconds and delete the first part.
4. Apply the “Time Remap” filter to the V1 clip.
5. Set a keyframe (clock symbol) at 5 seconds.
6. Set another keyframe at 7.5 seconds.
7. Set the Time parameter for this second keyframe to 10 seconds.
8. Move the V2 clip so it starts at 7.5 seconds.

The video will now play normal speed to 5 seconds then 2x speed [ (10-5)/(10-7.5) ] to 7.5 seconds, then normal speed from then on.

[shotcut]

@Ertan

why are the parentheses not active?

The square brackets are disabled because this filter does not support filter trimming. The curly braces are disabled because this filter does not support simple keyframes.

Try using the < and > buttons explained in

Time Remap Filter

The Time Remap filter is the first filter that allows altering the timing of the underlying source clip. It maps clip time to output time. [image] Limitations It can only be added onto clips with NO B-frames. If you try to add it to such a clip, it shows the Convert to Edit-friendly dialog. A proxy clip can mask the above check for B-frames and then export may be very slow or give bad results. However, it may also be a very convenient workaround for the check and dialog mentioned above if you…

[Ertan]

OK . i will try this.

Can’t we do this work on the keyframes I show in the picture? ie with V1.

it seems like it’s a little long this way…

[Ertan]

The square brackets are disabled because this filter does not support filter trimming. The curly braces are disabled because this filter does not support simple keyframes.

–
Parenthesis issue, I get it. Thank you.

[shotcut]

Please learn to quote a post correctly. The functionality in this forum software is super easy for that. When you select some text, you can simply click the Quote button.

[Ertan]

OK. Understood.

[Elusien]

@Ertan

Can’t we do this work on the keyframes I show in the picture? ie with V1.

You need at least 3 keyframes:

• one at 0 secs, value=0
• one at 5 secs, value=5
• one at 7.5 secs (or wherever you like) value=10 (you can drag the one you have currently at 10 secs)

You also need the duplicate track on V2 for what you are trying to achieve.

[Elusien]

Another way of doing it with only 1 track (V1) is replace step 8 with:

8. Split the V1 clip at 7.5 secs
9. Delete the second part
10. Move the V2 clip onto V1 at the end of the V1 clip
11. Delete track V2

In fact you can do all of this without V2, just having your duplicate clip on V1 following the original one.

[Ertan]

OK. I will try to do it the way you said.

*I’ve done work like this before without keyframes on V1. splitting the clip…

I need to work on the keyframes thing a little more.

Thank you very much for the answers.