Descriptions:
This Veteran AI tutorial covers four distinct scenarios for using LTX Video 2’s start-to-end frame generation feature, moving well beyond basic image-to-video generation. The video introduces a ComfyUI extension developed by community contributor TTPlanetPig that adds start and end frame control to LTX Two, working by defining latents and masks for both boundary frames—a mechanism similar to VACE’s first-frame-to-last-frame node.
The four scenarios are: completely unrelated start and end frames (requiring a descriptive bridging prompt), visually similar but perspective-shifted frames, highly correlated frames best served by a minimal prompt, and frames that appear related but contain significant discrepancies (typically producing a scene-cut or transition effect). A key practical insight is that for high-correlation frames, using a Prompt Generator actually introduces noise and degrades quality—a short, direct action description performs better because detailed environment descriptions compete with the character movement.
For the first two scenarios, the tutorial demonstrates how to use a Prompt Generator by uploading both frames, specifying which is start and which is end, and using the resulting output as the workflow prompt. Images are resized to a long edge of 1536 before compression. Workflows are hosted on RunningHub’s ComfyUI workspace. Understanding which scenario applies before writing a prompt is presented as the central skill for controlling LTX Two’s start-end frame generation effectively.
📺 Source: Veteran AI · Published January 12, 2026
🏷️ Format: Tutorial Demo
