IAMCCS Cine LTX Sequencer Fixed 5 (legacy alias)

The full IAMCCS_WDC_LTXSequencer can show up to 50 images, and that's a lot of widgets. IAMCCS Cine LTX Sequencer Fixed 5 (legacy alias) is the same sequencer logic pinned to exactly five keyframe slots with sensible defaults pre-filled - the version you reach for when your LTX shot is a simple five-beat board and you want the graph to stay readable.

What it does

Inputs mirror the big sequencer but fixed at five: positive/negative conditioning, vae, latent, multi_input (the batched reference board), and the five insert_frame_N + strength_N pairs. No insert_mode, no frame_rate, no second-based placement - this one is frames-only, because the fixed-slot design assumes a specific shot plan.

The defaults encode a classic pacing curve:

| Slot | insert_frame | strength | |------|--------------|----------| | 1 | 0 | 1.00 | | 2 | 96 | 0.85 | | 3 | 184 | 0.78 | | 4 | 288 | 0.72 | | 5 | -1 | 0.86 |

Slot 1 pins the opening frame at full strength; the middle slots step down in strength so the sampler gets looser between beats; and slot 5's -1 is "end of clip" - it anchors the last frame at the end, wherever that is. That's a first-frame → two mid-beats → last-frame structure, which is a sane default for a five-image LTX take.

Outputs: positive, negative, latent, and a report string summarizing what got inserted where - handy because with fixed defaults you sometimes want to confirm the plan before a long render.

How it works

Identical mechanism to the full sequencer: encode each still with the video VAE, insert at the frame, add guide info to the conditioning. The only difference is the rigid five-slot layout and the curated defaults. It's part of the IAMCCS_WDC_* legacy-compat family, so old Cine workflows that used the fixed-5 layout keep loading unchanged.

Installing it

Part of IAMCCS-nodes. ComfyUI Manager (search "IAMCCS") or:

cd ComfyUI/custom_nodes
git clone https://github.com/IAMCCS/IAMCCS-nodes.git

Restart after. Needs the LTX Video stack in ComfyUI; adds no model files.

Common issues

The -1 on slot 5 is the one that confuses people who think in frame numbers - it means "last frame of the clip," and it only works if the node can see the latent's length, so make sure the latent is connected before you expect the end anchor to fire. And remember these are fixed defaults, not magic: if your clip is 81 frames, frame 96 for slot 2 is past the end and silently does nothing. Check the report output once before a long render; it exists precisely so you don't discover that after the fact.