video-extend

# Video Extension (Pusa 2.2 — temporal flowmatching) ## Overview **Pusa extends a video temporally** — it continues / lengthens an existing clip rather than regenerating it from scratch. It does this on the **ComfyUI-WanVideoWrapper** stack (kijai) using the **WAN 2.2 T2V A14B** dual HIGH/LOW models you already have for `wan-t2v-video`, plus the small **Pusa V1 LoRAs** and a Pusa-specific sampling path: the **`flowmatch_pusa`** scheduler and the **`WanVideoAddPusaNoise`** node. The input clip is encoded with **`WanVideoEncode`** and injected as the *first latents* of the generation — that is what carries the existing motion/content into the continuation. The official reference graph is kijai's **`wanvideo_2_2_14B_Pusa_extension_example_01.json`** (in `ComfyUI-WanVideoWrapper/example_workflows/`). This skill is built directly from that workflow plus the live node schemas. > Relationship to `wan-t2v-video`: Pusa **rides on the exact same WanVideoWrapper > stack** — same T2V A14B HIGH/LOW fp8 models, same UMT5 text encoder, same WAN > VAE, same block-swap/torch-compile machinery. The *only* new downloads are the > two Pusa V1 LoRAs (~1.9 GB total). Read `wan-t2v-video` first for the base > stack; this skill is the temporal-extension delta on top of it. > ⚠️ Verification note: every node, model, LoRA filename and setting below was > confirmed against the live ComfyUI `/object_info` (WanVideoWrapper installed) > and against kijai's example workflow JSON + HF repo (June 2026)....