VACE Merge Back

VACE Merge Back — splices VACE sampler output back into the original full-length video. Connect the original (untrimmed) clip, the VACE sampler output, and the vace_pipe from VACE Source Prep. The pipe carries mode, trim bounds, and context frame counts for automatic blending. Pass-through modes (Edge Extend, Frame Interpolation, Keyframe, Video Inpaint, Upscale): Returns vace_output as-is — the VACE output IS the final result. Splice modes (End, Pre, Middle, Join, Bidirectional, Replace): Reconstructs original[:trim_start] + vace_output + original[trim_end:] with automatic blending across the full context zones. For two-clip Join Extend, connect source_clip_2 — the tail comes from the second clip. Blend methods: none — Hard cut at seams (fastest) alpha — Simple linear crossfade optical_flow — Motion-compensated blend using Farneback dense optical flow