Hunyuan Video 1.5 manual FLF implementation #11151
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kabachuha
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Kosinkadink,
comfyanonymous and
guill
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This pull request adds "manual" first-last frame support for Hunyuan1.5 video generation via latent concatenation.
The code is very simple and based on the first-last-frame implementation for Wan.
Because Hunyuan uses CLIP vision embeddings as input, without the dedicated model only one of them is used as provided.
One thing I would like to have help with is the last frame often "flickering" without direct soft transition. I also observed this problem for Wan2.2/VACE, but there it was less noticeable.
Otherwise, it looks good and it indeed takes the last frame's subject in consideration.
hunyuan_video_1.5_00010.mp4
Closes #11020.