How to dub a review video into Vietnamese with subtitles
Upload the video and tell Vizard Agent the target language and the kind of voice. Vizard Agent transcribes the original, calculates the reading speed each segment needs so the dub lands on the original timings, and tests the subtitle style on real frames before rendering.
What do you type into Vizard Agent?
State the voice in the same sentence as the language. Vizard Agent auditions candidates against that description before it records anything, and a phrase like "a male review voice" narrows the search far more than the language alone. A review, a tutorial and a commercial all want a different read.
Prompt
What does Vizard Agent actually do?
It treats the job as two halves. First it fits the translated voice to the original timing, segment by segment, because a dub that ignores the timing drifts until the voice describes something that has left the screen. Then it fights the subtitle box until the diacritics stop being clipped. In the session behind this article it:
- Extracted the speech and subtitles from the two-and-a-half-minute original and checked frames for where the original subtitle bar sat.
- Searched for Vietnamese male voices and recorded a test line to judge the tone.
- Calculated the reading speed and duration every dialogue segment needed, generated the dub in three parts, and adjusted each segment's speed and length so it landed where the original did.
- Measured the voice and a downloaded music bed separately and normalised the read.
- Rebuilt the subtitle style repeatedly (position, background, size, line breaks), checking real frames until the full text displayed, then verified the middle and end.
- Delivered 1024x576 H.264 at 30fps, 149.6 seconds, the source length exactly, with the game sound effects kept.
When does this not work well?
Translation does not carry everything across. Jokes and wordplay become plain sentences, and lip movement will not match, because this is a dub over the original picture rather than a lip-sync. Burnt-in text stays in the source language: Vizard Agent can cover it, but it cannot translate pixels in place. Some languages run longer, which means a faster read.
Common questions
Will it match the original length? Yes. This run delivered at exactly the source duration because Vizard Agent timed each segment.
Can I choose the voice? Yes. Describe it and Vizard Agent auditions candidates before recording.
Does it lip-sync? No. Vizard Agent lays the dub over the original picture. Lip-sync is a separate job.