How to put pictures behind a long recording you cannot cut
Tell Vizard Agent that the recording is fixed: not cut, not shortened, not re-voiced. The picture must run continuously underneath it. It plans the visuals from the transcript, then matches the picture track to the audio duration exactly, which is where this job gets difficult.
What do you type into Vizard Agent?
Say the audio is untouchable and that there must be no black screen at any point, which is what continuous actually means. Add "do not generate yet" if you want the estimate first. On a job this size it costs nothing for Vizard Agent to plan the work, count the scenes and price them first.
Prompt
What does Vizard Agent actually do?
Choosing and making the visuals is the straightforward half. The hard half is timing: joining clips end to end does not give the sum of their durations, because container rounding and mismatched time bases add fractions of a second each. Vizard Agent fixes that drift in the join, never by trimming the audio. In the session behind this article it:
- Checked the file's duration and streams, sampled its beginning, middle and end, and priced the tools before anything ran.
- Summarised a working transcript section by section to decide how many scenes the 27 minutes needed, then wrote a scene plan and the caption timing file.
- Ran a parallel batch of images and short motion clips, then added free stock of landscapes and skies between the generated scenes.
- Built Arabic captions and fixed their font and safe-area placement.
- Found the picture running long, measured every clip's duration, and re-joined it with a uniform time base and then a frame-accurate filter that removed the timing gaps.
- Laid the original audio and captions over the 16:9 picture, confirmed both durations matched, and re-rendered so the video ended with the audio, with no silent tail.
When does this not work well?
Some recordings are not worth illustrating end to end. A rambling two-hour file, or one where poor audio makes the speech hard to follow, produces a long video nobody watches, and the honest advice is to cut it. Abstract subjects are hard too, because generic imagery starts to feel like wallpaper. If the material has strict imagery rules, say so up front.
Common questions
Will the voice be changed at all? No. Vizard Agent treats the audio as fixed and builds the picture to it.
How much does 27 minutes cost? Ask first. Vizard Agent counts the scenes from the transcript and prices those.
Does every scene have to be generated? No. Vizard Agent mixes stock between generated scenes, which is cheaper.