How to check and improve faces and lip sync in AI rap videos

Separate four different quality questions

A video can be sharp but show a changing face. It can have an enjoyable beat but miss your words. It can show two people while only one leads. Check identity, sound, role delivery and output-file quality separately. A higher-resolution setting does not by itself resolve the first three.

The examples page identifies recorded configurations. A sample can support observations about that recording, not a success rate for every new face, scene or model.

Listen first, then watch the mouths

Play the whole clip with sound. Note whether the intended words and names are present, a voice begins late or changes unexpectedly, or the ending cuts off a phrase. An audio reference and a selected performance language do not guarantee that the recording was preserved or translated.

Play it again while watching the mouths. Do they follow the audible lead, or keep moving during a pause? In Duo, inspect the non-leading partner as well. Good timing in one moment does not establish accurate mouth shapes throughout a fast verse.

Compare the faces through movement

Check the opening, middle, each role handoff and the final moment. Compare face shape, hair, skin tone, clothes and left/right position with the references. Look at hands and shoulders when the person gestures. Identity may drift only when the camera or lighting changes.

For two people, record a swap or a merged face separately from an odd expression. The effect can begin halfway through the clip, so a thumbnail or a few still frames is not enough to establish a stable performance.

Try changes that address the observed problem

For a weak or obscured face, try another original portrait with a visible mouth. For crowded input, crop a copy or use separate portraits. For rushed delivery, shorten the lyrics and leave room for names and the final phrase. For confusing roles, simplify to one brief line per person or one lead.

These are reasonable changes to test, not guaranteed repairs. Unless you have compared controlled outputs, do not conclude that a new resolution or a different scene caused an improvement. Change one useful variable at a time and keep a note of the actual result.

Keep a useful issue record

Note the task ID, the time in the video and the symptom: for example, ‘right person appears to take the left line around four seconds.’ Include what you expected and whether the file plays normally. This is more actionable than ‘the quality is bad.’

If the task is still being checked, wait for its outcome before resubmitting. A new request may use more credits. A technical final failure, an uncertain supplier result and a completed clip that does not match your taste have different handling under the refund policy.

Approve only what you have inspected

A review applies to the tested inputs and settings. A human orange-booth recording does not approve pets, an audio-reference workflow or every resolution. File dimensions are measured properties; face likeness and delivery are separate observations.

Return to the photo preparation guide or lyrics guide, and contact support with the task details when you need help. Download any result you want to keep before its file deadline.