H3 users are struggling to combine custom lip sync with forced start and end frames

chopders · reddit · 2026-08-04

The author is trying to port an old LTX 2.3 workflow to H3, combining three things at once: custom-audio lip sync, extending an image into a full clip, and forcing both a start frame and an end frame. In H3, that combo seems to break, and they ask whether anyone has found a workflow that makes all of it work together.

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