LTX Review Preview

LTX Review Preview is the display half of the pack's review pair: it takes a path to a video file and shows it in the ComfyUI UI. That's the entire job. No pass-through outputs, no processing, no decode - it's a display node, and its whole reason for existing is to pair with LTX Review's review_path output so you can watch the temp preview clip your review gate generated.

It's part of ComfyUI-FBnodes, François Beaudry's utility pack. If you've used LTX Review, you've hit the moment where it hands you a path and you want to see it - this is the node that turns that string into a playable preview without dragging in a whole video player pack.

How it works

The single input is review_path (STRING). It accepts either an absolute path or a relative one with optional [input] / [output] / [temp] annotations - so a value like [temp]review_123.mp4 resolves correctly against ComfyUI's folders. When executed, the node resolves the path, loads it, and pushes it to the UI as an animated preview. That's the mechanism in full: path in, video on screen, nothing else.

Because it's display-only, it slots into the graph anywhere downstream of a node that produces a file path - not just LTX Review. Wire a Save Video+'s filename output into it and you get an in-graph preview of exactly what you saved, no re-encoding.

The one input

• review_path (STRING) - absolute path, or relative with [input]/[output]/[temp] annotations.

No outputs - it's an output node by design.

Installing it

ComfyUI Manager - search "ComfyUI-FBnodes" - or:

cd ComfyUI/custom_nodes
git clone https://github.com/FranckyB/ComfyUI-FBnodes.git
pip install -r ComfyUI-FBnodes/requirements.txt

Restart ComfyUI. The pack installs av (PyAV) and color-matcher regardless; this node itself is near-free.

Gotchas

The practical trap is a stale path: if the file it points at no longer exists (temp files get cleaned, output files get renamed), the preview comes up empty rather than wrong - that's expected, re-run the producing node. And because it's a display node, it has no result, so you can't chain anything off it; put it at the end of the branch you're inspecting. If the video doesn't preview in your browser, remember it's showing whatever codec the file has - a 10-bit H.265 file may not play in-browser, which is exactly why LTX Review generates its own H.264 preview.