Unshift Pose Frames

Unshift Pose Frames is the mirror of Shift Pose Frames, and it has exactly one job: take the reordered sequence from its sibling, undo the surgery, and hand you back the original frame order. You don't reach for this node alone - it's the return trip. If you're doing the WAN seamless-loop trick, you wire Shift → generate the transition over the blank frames → Unshift, and this is what makes the whole thing feel like one operation instead of three fiddly steps.

How it works

It's deliberately bookkeeping-driven. Shift Pose Frames emits three metadata values - shift, blank_frames, is_loop - and you feed them straight back into this node along with the processed frames. The node then reverses the layout:

1. If is_loop is true, it trims the two overlap frames from each end (the 4-frame margin Shift added).
2. It rotates the sequence left by shift frames, which moves everything back to its original order. The blank-frames gap you filled with generated transition content stays in the middle of the sequence where the seam used to be, so the wrap is now a smooth, generated connection.

Output is the restored frames batch plus a total_frames count so you can confirm nothing was lost in the shuffle.

Inputs and outputs

• frames (IMAGE) - the shifted, now-inpainted sequence from Shift Pose Frames.
• shift (INT) - the shift value from Shift Pose Frames' output.
• blank_frames (INT) - same, from Shift Pose Frames.
• is_loop (BOOLEAN) - same again. These three are the contract between the two nodes.

Outputs: frames (IMAGE) and total_frames (INT). Both feed straight into your next stage - a pose render, a save node, whatever comes after the loop is sealed.

Installing it

Same pack, same install:

cd ComfyUI/custom_nodes
git clone https://github.com/Mister-Link/link-comfy-nodes
cd link-comfy-nodes
pip install -r requirements.txt

or ComfyUI Manager → "Link Comfy Nodes", restart. Pure tensor math, no models.

Common issues

• "Looped Shift Pose Frames input must include the 4 overlap frames" - you set is_loop true but the input doesn't have the overlap margin. It only gets added by Shift Pose Frames when blank_frames > 0, so if you bypassed Shift or set blank_frames to 0, the flag and the frames disagree.
• "No frames remain after removing overlap frames" - the trimmed sequence was empty, which means the input was too short to carry the overlap. Feed the real Shift output.
• Order comes back wrong - you're supposed to pass the exact shift value from Shift Pose Frames, not compute it yourself. It's already the correct rotation amount; just wire it.

The honest framing: this is a 20-line utility node, and that's fine. It exists so the Shift/Unshift pair is symmetric and the loop trick stays push-button. You'll use it every time you loop a WAN clip and think about it for about two seconds - which is exactly what a good utility node should be.