Frame nudge
Frame nudge moves the video alignment offset by exactly ±1 frame at a time. Use it after auto-align when the video is close but not quite on the cut or beat — a single frame of drift is often visible and audible when the video audio and the reference audio are compared carefully.
The nudge buttons
The nudge buttons are in the Video Audio row under the music waveform (the green lane that appears once a video is loaded), not in the Video Reference panel:
- ◀ (Nudge video -1 frame) — shifts the video one frame earlier relative to the audio.
- ▶ (Nudge video +1 frame) — shifts the video one frame later relative to the audio.
The offset shown at the bottom of the Video Reference panel updates after each press, and each press is one step of Ctrl+Z.
Frame size
One frame is the duration at the project's current frame rate. At 25 fps a frame is 40 ms; at 29.97 fps a frame is approximately 33.37 ms. The nudge button always moves by exactly one frame in the active frame rate.
What nudge does not do
Frame nudge applies an additive offset on top of whatever alignment is currently set. It does not re-run the waveform comparison — if you want to redo the automatic alignment, click the ⟳ button (Re-sync to audio) next to the nudge buttons instead, and then nudge from there if needed.
Workflow
The recommended workflow is: import → let auto-align run → check the result visually in the Video Audio lane → nudge ±1 frame until the video cut lines up with the waveform feature you expect. Typically two or three nudges are enough to correct a sub-frame auto-align error.