GVHMR Motion Capture

Pulls one person's body motion out of a video with GVHMR. The pack author's two bundled workflows as shipped: GVHMR.json (clip + mask video of the same clip, person white on black → GVHMRInference → SMPLViewer) and smpl_to_bvh_pipeline.json (SMPLtoBVH → BVHViewer), joined where the author's tooltip says: SMPLtoBVH reads GVHMRInference's npz_path. Writes <filename_prefix>_motion.bvh, a GLB of the motion (the pack's SMPLToGLB) and smpl_params_*.npz to the node's output folder, plus a preview video for the gallery: HY-Motion's HYMotionPreview2D draws the captured skeleton from the front (azimuth 90), at the clip's fps, up to 500 frames. Licence: GVHMR and its SMPL body model are non-commercial, research and education only. Needs the ComfyUI-MotionCapture (github.com/PozzettiAndrea/ComfyUI-MotionCapture) and ComfyUI-HyMotion (github.com/PozzettiAndrea/ComfyUI-HyMotion) node packs.