How to strip the captions out of an edit and rebuild it to new music
Upload the edit and the track you want under it. Vizard Agent measures the old text bars to the pixel, removes them and verifies the frame is clean, analyses the new track's transients, and re-times every cut so the edit lands on the new music rather than the old.
What do you type into Vizard Agent?
Be specific about which text survives. Vizard Agent measures and removes what you name, so "remove all the captions but keep the before and after labels" is precise enough to work from, whereas "clean it up" is not. You don't need the original project file: the rendered edit and the new track are enough.
Prompt
What does Vizard Agent actually do?
Reusing an edit with a different song isn't a soundtrack swap. The cuts were placed against the old track's beats, so every cut has to move to the new transients, and the burnt-in captions have to come out first. Almost half the work is measurement, done before touching a pixel. In the session behind this article it:
- Extracted frames to see the existing captions, detected the scene cuts in the original edit and checked where the text bars sat.
- Laid a measuring grid over the graphics to pin the exact coordinates of the top card and the bottom bar.
- Tested the removal on sample frames and verified the cleaned top and bottom of the frame separately, re-measuring when the first coordinates were slightly off.
- Analysed the new track's tempo, structure and energy second by second, computed the beat-matched cut points, and compared two layouts for new before-and-after labels on frames.
- Rendered all twelve shots with the new labels, tested a tighter crop to remove what the old graphics left behind, re-timed every cut to the new track's transients and measured the final loudness.
- Delivered a vertical 1080x1920, 30fps H.264 file of 17.53 seconds with AAC audio.
When does this not work well?
Removing burnt-in text is a repair rather than an undo, and how cleanly it goes depends on what's behind the text. A static bar over a still area cleans up best, while busy or moving backgrounds remain the hard case. Removal can also leave dead space, and a crop often finishes the job better than a repair.
Common questions
Do I need the original project file? No. Vizard Agent works from the rendered video, which is what makes this possible at all.
Will the removal be invisible? Over a static area, usually. Over a moving background it's harder, and Vizard Agent will suggest a crop where a repair can't finish the job.
What if the new track is a different length? Vizard Agent re-times to it, which can mean a shot is held longer or dropped.