Why Your AI Lip Sync Looks Fake (and the Input Fixes That Help)
AI lip sync takes one still image and an audio track and turns them into a talking video. The model is rarely the reason a result looks off. Most of the problems come from the inputs: the photo, the script and the audio. This post starts from the symptom. Find the one you're seeing, then fix the input behind it. Likely cause: the face is too small in the frame. In a wide shot or a group photo, the mouth is only a few dozen pixels across, and the model has very little to work with. Fix: crop to…