Wan2.2 I2V V2V Video Extend Quant 14B
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# Singularity for ComfyUI
Singularity is a public-alpha ComfyUI custom node for Wan image-to-video cascade continuation.
It is made for users who want longer Wan I2V / V2V videos without manually extracting the last frame, loading it again, making another short clip, and stitching everything later.
In simple terms:
```text
Generate a segment.
Pause.
Look at the last-frame candidates.
Choose the best continuation frame.
Continue the same run.
Get one stitched final video.
```
## Main Feature
The special feature is the pause-and-continue panel.
When a cascade boundary is reached, Singularity shows:
```text
Source | Tail 1 | Tail 2 | Tail 3 | Tail 4 | Tail 5 | Result
```
You click the tail frame that should become the source for the next cascade, then press Resume Cascade / Continue.
This gives you direct control over the continuation point instead of letting the workflow blindly continue from a bad or unstable frame.
## What It Does
- Adds one visible ComfyUI node: Singularity.
- Generates Wan I2V video segments.
- Supports up to five cascade segments in the current public alpha.
- Can pause after cascade 1, 2, 3, or 4.
- Lets you manually pick the tail frame for the next segment.
- Continues the same running workflow.
- Saves one final stitched video.
- Saves markdown reports with runtime, cascade, motion, and delta diagnostics.
- Keeps a clean public interface with research-only formula recommendation visible but off by default.
- Keeps ComfyUI widget values stable after restart/save/reload.
## Why This Is Useful
Wan extension workflows can become messy very quickly:
- many repeated sampler groups;
- manual last-frame extraction;
- separate output clips;
- manual stitching;
- unclear continuity between segments;
- hard-to-compare prompt, seed, and delta changes.
Singularity turns that into a controlled loop inside one node. You still make the creative decision, but the node handles the pause point, the chosen frame, continuation, final stitching, and report evidence.
## r113 Public Stabilization Update
This r113 public stabilization update focuses on making the node cleaner, easier to install, and safer to test in modern ComfyUI Desktop.
It keeps the earlier pause UI recovery work, adds newer Strategy / continuity reporting layers, expands tail selection to five candidates, and fixes a widget-order issue that could make saved workflow values appear in the wrong fields after reload.
New in r113:
- Visible title: Singularity R113.
- Fixes ComfyUI Desktop widget value drift after save/reload.
- Keeps backend widget order stable.
- Adds a severe drift repair guard for already-corrupted workflow states.
- Five tail-frame candidates instead of three.
- Public starter node has no bundled image and no positive prompt.
- Built-in Wan-style Chinese negative prompt remains as the starter negative prompt.
- Two-cascade public starter route remains the default.
- Native ComfyUI image upload button is preserved.
- Detached Source / Tail / Result panel remains available for cascade continuation.
- Reports include cascade, runtime, Strategy Control Surface, Strategy Matrix, input-normalization, and completion evidence.
- Experimental math modes remain available, but they should be treated as research tools.
## Public Default Settings
The default r113 node is meant to be a clean starter:
```text
cascade_count = 2
pause_after_cascade_1 = true
frames_per_cascade = 49
width = 704
height = 1280
fps = 16
seed = 123
math_control_mode = OBSERVE_ONLY
high_delta_strength = 1.0
low_delta_strength = 1.0
image_crop = wan_native
save_video = true
save_report = true
sampler_trace_mode = OFF
```
If 704 x 1280 is too heavy for your GPU, lower the resolution before rendering.
## About The Math
The project studies generation as an event:
```text
Outcome(t-1) + ObservedBehavior(t-1)
= Strategy(t)
= ObservedBehavior(t+1) + Outcome(t+1)
```
For a normal user, this means the node tries to make the source image, prompt meaning, model interpretation, sampler route, latent motion, and visible video easier to inspect as one connected process.
The math is not a magic quality button. It is a way to observe, compare, and carefully test how generation changes.
Use OBSERVE_ONLY for a clean baseline.
Use LATENT_DELTA_SCALE only when intentionally testing delta behavior.
Use STRATEGY_PRESSURE_WINDOW when intentionally testing bounded pressure-intent math. With high_delta_strength = 1.0 and low_delta_strength = 1.0, it remains neutral.
Avoid DEEP_STEP_DELTA_CONTROL unless you are doing research and accept that it can break output.
## What Is Drift?
Drift means the video moves away from your intended result.
Examples:
- the source image stops being respected;
- the subject identity changes;
- the prompt becomes ignored;
- motion becomes unstable;
- the next cascade does not continue naturally;
- experimental math settings make the image noisy or broken.
Singularity helps you notice and compare drift. It does not guarantee that every video will be perfect.
## Important Public Alpha Notes
- This is not a final production release.
- Current public cascade limit is 5.
- Infinite cascades and prompt-per-cascade scheduling are future work.
- The node is Wan-first.
- Models are not included.
- Heavy resolutions require more VRAM and time.
- Always inspect the final video, not only the report.
- CompletionGate = PASS means the route completed and a final video exists, not that the video is visually perfect.
## Recommended First Test
```text
cascade_count = 2
pause_after_cascade_1 = true
frames_per_cascade = 49
fps = 16
seed = 123
math_control_mode = OBSERVE_ONLY
save_video = true
save_report = true
```
Pick a source image, write a clear prompt, generate, choose a tail frame when the panel appears, continue, then inspect the final stitched video.
## Short Summary
Singularity is a Wan I2V cascade continuation node for ComfyUI. It pauses between cascade stages, lets you choose the continuation frame, resumes the same run, stitches the final video, and writes diagnostics so you can understand the result instead of guessing.