Add 3-beat 10s H3 quality ref test

custom/chris/minimax-h3-two-beat-savevideo-test/README.md

@@ -1,10 +1,10 @@
-# MiniMax H3 Two-Beat SaveVideo Test
+# MiniMax H3 SaveVideo Tests
 
 Practical test flow for `DumasH3LongVideos` that:
 
 - uses `LoadImage` refs derived from images stored in this repo
-- renders exactly 2 beats
-- stays under 10 seconds total
+- renders short beat-based clips
+- stays near or under 10 seconds total
 - converts the returned image batch with `CreateVideo`
 - saves the final file with `SaveVideo`
 
@@ -22,18 +22,17 @@ Upload those repo images into the live ComfyUI input folder with these names:
 - `default-character-reference.jpg`
 - `default-location-reference.jpg`
 
-The included `api-prompt.json` expects those names in `LoadImage`.
+The included baseline prompts expect those names in `LoadImage`.
+
+The new reference-quality prompt uses these live input names instead:
+
+- `chris-character-reference.jpg`
+- `chris-location-reference.jpg`
 
 ## Flow summary
 
 `LoadImage x2 -> DiffusionModelLoaderKJ / CLIPLoader / VAELoader x2 -> DumasH3LongVideos -> CreateVideo -> SaveVideo`
 
-## Timing
-
-- `shot_seconds = 3`
-- `2 beats`
-- total target runtime = `6s`
-
 ## Variants
 
 - `api-prompt.json`
@@ -46,7 +45,22 @@ The included `api-prompt.json` expects those names in `LoadImage`.
   - `2` beats at `4s` each
   - total target runtime = `8s`
 
+- `api-prompt-3beat-10s-480p-quality.json`
+  - reference-quality follow-up for today's H3 live test
+  - `3` beats with explicit per-beat timing: `3s`, `3s`, `4s`
+  - total target runtime = `10s`
+  - expects the provided live refs to be uploaded as:
+    - `chris-character-reference.jpg`
+    - `chris-location-reference.jpg`
+  - quality-oriented settings:
+    - `864x480` (`0.4 MP` at `16:9`)
+    - `20` steps
+    - `euler` sampler
+    - `beta` scheduler
+    - H3 turbo LoRA enabled
+
 ## Notes
 
 - This is a practical API flow, not a promoted master workflow.
-- The H3 node is configured for a cheap proof run, not final quality.
+- `api-prompt.json` and `api-prompt-realistic-16x9.json` remain cheap proof-run variants.
+- `api-prompt-3beat-10s-480p-quality.json` is the quality-biased reference test.