How to Make an AI Video With the Original Audio

Picture generation and sound restoration are separate steps

A video model may produce silent picture or its own audio. The finished workflow uses the generated picture together with audio from the selected prepared source. This keeps the source performance's sound tied to the scene and segment you chose.

The application restores the selected source sound after generation rather than asking your portrait to generate a new soundtrack.

The selected source segment controls both tracks

All current template cuts begin at 0:00. A 5-second choice uses that opening segment's picture timing and sound, while a longer choice includes more of the same opening sequence. A separate public demonstration or case does not set a user's source duration.

Topo Gigio's full picture is approximately 7.87 seconds. A short audio tail can make browser playback slightly longer, while the credit quote rounds up to 8 started seconds. That small difference is not a reason to stretch the performance to a different length.

Know which video you are listening to

A public demonstration and a completed case can have different identities, durations, frames or sound from the private input used for generation. For example, the blue-character case in the Bulin 47 creation studio is silent, while personalized generation restores the selected source audio.

Before deciding that a template has no sound, identify whether you watched the demonstration, a silent case or the actual saved output. A portrait reference image beside an example also does not describe every input required by the current studio.

When you try the Smalltown Boy dance effect, the public cat demonstration has its own soundtrack and frame. Your generated MP4 uses audio from the selected private dance source. The APT AI Video Generator and Hotel Lobby creation studio also keep public AI demonstrations separate from private generation inputs.

Check your scene's demonstration and source relationship

Check the output with sound enabled

Wait for the result page to report completion. Turn on the player's sound, check the device volume and play the whole MP4. Listen through the opening and ending as well as watching mouth movements where they are visible.

The workflow corrects small timing differences and validates the processed video and audio. Those media checks establish a compatible playable result, not perfect lip sync or musical interpretation. Inspect the actual output before uploading it elsewhere.

What to do if the finished video seems silent

First distinguish a muted player from a silent file. Check the volume controls, then download the completed MP4 and play it in another compatible player. Compare that file with the saved result page before making another generation request.

If the completed file still has no sound, use the request reference when contacting support. Keep the existing request while the issue is checked; refreshing its page does not generate again. If you add another track in a social app afterward, preview the combined sound so it does not clash with the restored source audio.

Contact support about a completed request