Tutorials / Going further
Updated
Speed ramps, coming from Vegas
A Vegas velocity envelope is a speed line in Lumit, drawn across each picture clip in the Cut timeline, in per cent. The same line is the speed envelope under a Sequence layer’s clips in the Timeline. Everything else on this page is in Retiming and speed.
Vegas to Lumit
Section titled “Vegas to Lumit”| Vegas | Lumit |
|---|---|
| Velocity envelope | The speed line across a clip in the Cut timeline |
| Fade types on an envelope segment | Linear, Fast, Slow, Smooth, Sharp and Hold on the line’s right-click menu |
| Paste event attributes | Speed ▸ Copy speed and Paste speed on a clip’s right-click menu |
| Playback rate, in Event properties | Speed ▸ Speed… on the clip’s right-click menu |
Ctrl+drag an event’s edge | The same in Cut with the Vegas preset, or Stretch… on a layer’s right-click menu |
| Reverse | A speed below 0% |
| Insert freeze frame at cursor | A point at 0%, or Freeze frame at playhead on a layer |
| Resample mode: Disable resample | In-between frames ▸ Nearest |
| Resample mode: Force resample | In-between frames ▸ Blend |
| Optical flow | Flow |
A velocity envelope in Vegas runs from −100% to 300%. A speed envelope runs from −10000% to 10000%.
1. Set Lumit up the Vegas way
Section titled “1. Set Lumit up the Vegas way”On the first run, choose Vegas under Editing style. Tick Use the Vegas shortcuts for the keys and mouse drags you know. Lumit opens in the Cut workspace.
Already past the first run, the same choices are in Settings:
- Settings ▸ Timeline ▸ Editing ▸ Video arrives as a Sequence layer
- Settings ▸ Timeline ▸ Editing ▸ Retime opens to Speed
- The Vegas preset in Settings ▸ Shortcuts, which also sets Clip drags in Cut to Vegas
2. Put the footage in the Cut timeline
Section titled “2. Put the footage in the Cut timeline”Drag the footage from the Project panel onto the Cut timeline. Its picture lands on a picture
track, and its sound on a track below. S splits the clip at the playhead. Turn on the
Speed switch on the strip, or press Ctrl+Shift+E with the Vegas preset, to show the
speed line across each clip at 100%. A clip keeps its line once its speed changes.
In the Timeline the same line runs under a Sequence layer’s clips: double-click the layer’s row to open it.
3. Add points
Section titled “3. Add points”Double-click the line where the ramp should start, and again where it should end. A new point takes the speed already there.
4. Set the speed
Section titled “4. Set the speed”Drag the second point down. The readout beside it gives the speed. Hold Ctrl for a tenth of
the movement with the point held at its time, or Shift to move it in time only.
For an exact number, right-click the point and choose Set speed…. Double-click a point to put it back to 100%.
5. Shape the ramp
Section titled “5. Shape the ramp”Right-click the line between two points and choose its curve: Linear, Fast, Slow, Smooth, Sharp or Hold. The clip keeps its start and its length.
6. Give the ramp to other clips
Section titled “6. Give the ramp to other clips”Right-click the ramped clip and choose Speed ▸ Copy speed. Pick the other clips, right-click one, and choose Speed ▸ Paste speed. Each takes the ramp stretched to its own length.
7. Play it
Section titled “7. Play it”Press Space. A clip with spare media after its end can be lengthened by dragging its edge,
and carries on at the speed of its last point.
Hold a frame
Section titled “Hold a frame”Drag a point to 0%. The frame there holds until the next point.
Play backwards
Section titled “Play backwards”Drag a point below 0%, or give it a negative speed with Set speed….
One speed for the whole clip
Section titled “One speed for the whole clip”Right-click the clip and choose Speed ▸ Speed…. Speed ▸ Reset speed puts it back to 100%.
For a layer, right-click its row and choose Stretch…. It sets a speed and gives the layer
the length that goes with it. Holding Shift while you drag either end of the layer does the same.
Smoother slow motion
Section titled “Smoother slow motion”Footage played slower than its own frame rate repeats frames. Flow makes the frames in between.
Flow is a switch on footage layers: the Flow cell in the Modes column, or Layer ▸ Flow. Convert to sequence layer gives every clip the setting the footage layer had. See Frames in between.
In the Cut timeline a picture clip’s sound is a clip of its own, and plays at normal speed whatever the picture’s speed. In the Timeline a retimed clip is silent. Detach audio on the layer’s right-click menu, before retiming, moves the sound to an Audio layer of its own at normal speed.