LTX-2.5: FLF2V is a focused ComfyUI workflow for turning two still images—your intended first and last frames—into a single, coherent video. It’s ideal for creating smooth transitions, morphs between subjects, or bridging shots in a sequence when you only have still references. Two LoadImage nodes supply the start and end visuals, which feed into a single LTX-2.5 FLF2V generator node (cf70afc4-5a03-47ce-8210-734b1de6c6bc). The resulting frames are handed to SaveVideo for encoding to a playable clip. A MarkdownNote is included with inline tips.

Under the hood, the LTX-2.5 node leverages Lightricks’ open video generation model and its keyframes-first “Pixel Diffusion” approach to synthesize in-between frames from your bookend images. Typical controls you’ll use are target resolution, number of frames (or duration), frames-per-second, and a random seed for reproducibility. Many builds also expose blending/easing options to bias the motion toward the first or last frame. SaveVideo then encodes the output at your chosen fps (MP4/WebM, depending on your ffmpeg setup).

For best results, match the aspect ratio and general lighting/composition of your two reference images. Larger frame counts and consistent content between the first and last frames usually produce smoother motion. If you see stretching or cropping, pre-crop your inputs to the same size before loading them into the workflow.