Add true 200px compressed aligned video demo

.gitattributes

@@ -56,3 +56,12 @@ examples/seedance-action/seedance-2-action-bicubic-x2-400p.mp4 filter=lfs diff=l
 examples/seedance-action/seedance-2-action-clark-x2-400p.mp4 filter=lfs diff=lfs merge=lfs -text
 examples/seedance-action/seedance-2-action-held-out-target-400p.mp4 filter=lfs diff=lfs merge=lfs -text
 examples/seedance-action/seedance-2-action-real-input-200p-crf32.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-held-out-target-400px.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-real-input-200px-crf36.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-bicubic-x2-400px.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-clark-x2-400px.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-200px-triptych.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-200px-before-after.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-200px-before-after-poster.png filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-200px-wipe.mp4 filter=lfs diff=lfs merge=lfs -text
+examples/seedance-action/seedance-2-action-200px-wipe-poster.png filter=lfs diff=lfs merge=lfs -text

README.md

@@ -21,37 +21,40 @@ The browser artifact has 8,496 parameters and runs as three fused FP16 WebGPU re
 
 ### Moving Seedance 2.0 action test
 
-<video controls loop playsinline muted width="100%" poster="examples/seedance-action/seedance-2-action-200p-before-after-poster.png">
-  <source src="https://huggingface.co/clark-labs/clark-realtime-ui-video-upscaler-x2/resolve/main/examples/seedance-action/seedance-2-action-200p-before-after-magnified.mp4" type="video/mp4">
+<video controls loop playsinline muted width="100%" poster="examples/seedance-action/seedance-2-action-200px-wipe-poster.png">
+  <source src="https://huggingface.co/clark-labs/clark-realtime-ui-video-upscaler-x2/resolve/main/examples/seedance-action/seedance-2-action-200px-wipe.mp4" type="video/mp4">
 </video>
 
-[Watch the large 200p before/after](examples/seedance-action/seedance-2-action-200p-before-after-magnified.mp4) · [Inspect the 200p three-way control](examples/seedance-action/seedance-2-action-200p-magnified-detail.mp4) · [Watch the original Seedance master](examples/seedance-action/seedance-2-action-original-720p.mp4)
+[Watch the aligned 200-pixel wipe](examples/seedance-action/seedance-2-action-200px-wipe.mp4) · [Inspect the source/bicubic/Clark control](examples/seedance-action/seedance-2-action-200px-triptych.mp4) · [Download the real 200×112 input](examples/seedance-action/seedance-2-action-real-input-200px-crf36.mp4) · [Watch the original Seedance master](examples/seedance-action/seedance-2-action-original-720p.mp4)
 
 This five-second, 24 FPS test starts with a public 1280×720 Seedance 2.0 action
 generation: a running puppy, tracking camera, fur, grass, flowers, and a moving
 butterfly. A deterministic product-demo HUD is added before downsampling so the
 test also contains the small labels, cards, and buttons this model targets. The
-large demo intentionally uses a heavily compressed 356×200 input and displays a
-moving detail crop at 2×. Clark's honest x2 output is 712×400; the demo does not
-pretend that x2 reaches the original 720p reference.
+hero intentionally uses a heavily compressed, genuinely tiny 200×112 input.
+The aligned wipe compares the same moving pixels: the decoded source is
+nearest-neighbor magnified 4× for inspection and Clark's honest 400×224 x2
+output is magnified 2×. Display magnification is not counted as model output.
 
-Against a separately derived 712×400 held-out target, across all 120 frames:
+Against a separately derived 400×224 held-out target, across all 120 frames:
 
 | Measure | Bicubic x2 | Clark x2 | Gain |
 |---|---:|---:|---:|
-| RGB PSNR | 27.054 dB | 27.169 dB | +0.115 dB |
-| Edge PSNR | 14.915 dB | 16.137 dB | +1.222 dB |
-| Temporal-delta PSNR | 27.891 dB | 27.744 dB | -0.147 dB |
-
-The two-panel hero makes the low-resolution input-to-output change legible. The
-three-way control remains the scientific comparison: Clark improves edge
-recovery over bicubic, but only narrowly improves whole-frame reconstruction
-and still trails bicubic on temporal-delta fidelity. The source, separate
+| RGB PSNR | 23.383 dB | 23.338 dB | -0.045 dB |
+| Edge PSNR | 12.296 dB | 12.538 dB | +0.241 dB |
+| Temporal-delta PSNR | 24.784 dB | 24.666 dB | -0.119 dB |
+
+The moving wipe makes the low-resolution input-to-output change legible because
+the comparison is spatially aligned. The three-way control remains the
+scientific comparison: at this deliberately extreme size and compression,
+Clark improves edge recovery over bicubic but does not beat bicubic on
+whole-frame or temporal-delta fidelity. The source, separate
 bicubic and Clark outputs, held-out reference, exact prompt, seed, hashes,
-crop, and metric definitions are all included under
+and metric definitions are all included under
 `examples/seedance-action/` and `technical/seedance-action-video-evaluation.json`.
 
-The less severe 640×360 to 1280×720 test is also included as
+The less severe 356×200 to 712×400 test improves RGB PSNR by 0.115 dB and edge
+PSNR by 1.222 dB versus bicubic. The 640×360 to 1280×720 test is included as
 [a native triptych](examples/seedance-action/seedance-2-action-native-triptych.mp4).
 It measures +0.703 dB RGB PSNR, +2.673 dB edge PSNR, and -0.922 dB
 temporal-delta PSNR versus bicubic.

examples/seedance-action/seedance-2-action-200px-before-after.mp4

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+size 3661573

examples/seedance-action/seedance-2-action-200px-triptych.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2d999796f28d5367789a65fb0393ac58d7f6d0ebe0a7c35197fcc40b4d8804c7
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examples/seedance-action/seedance-2-action-200px-wipe.mp4

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+oid sha256:b24fc83fca9ac2c616c89bcd48f85f98bee819e2fc00917b7206855e45c2b3d6
+size 1978956

examples/seedance-action/seedance-2-action-bicubic-x2-400px.mp4

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+oid sha256:e09c6ff8d6535ccd0e8e1304e503bc3907251bdd9a71af5bb6139d12bd8ab868
+size 1091381

examples/seedance-action/seedance-2-action-clark-x2-400px.mp4

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+size 1280429

examples/seedance-action/seedance-2-action-held-out-target-400px.mp4

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+size 1401259

examples/seedance-action/seedance-2-action-real-input-200px-crf36.mp4

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+size 127966

technical/package-ledger.json

@@ -3,8 +3,8 @@
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technical/seedance-action-video-evaluation.json

@@ -59,6 +59,27 @@
       "temporal_gain_db": -0.14667097414172403
     }
   },
+  "compressed_200px_wide_stress_test": {
+    "contract": {
+      "held_out_target": "400x224 Lanczos derivative of the 720p reference",
+      "real_input": "200x112 H.264 CRF 36 derivative of the held-out target",
+      "bicubic": "bicubic x2 from the decoded compressed input",
+      "clark": "RGB student x2 from the same decoded compressed input",
+      "display": "source nearest-neighbor 4x; x2 outputs nearest-neighbor 2x"
+    },
+    "metrics": {
+      "frames": 120,
+      "bicubic_psnr_db": 23.383082163063655,
+      "clark_psnr_db": 23.33781800943331,
+      "bicubic_edge_psnr_db": 12.296378722776026,
+      "clark_edge_psnr_db": 12.537776923891721,
+      "bicubic_temporal_psnr_db": 24.784364514745608,
+      "clark_temporal_psnr_db": 24.665802563480675,
+      "psnr_gain_db": -0.045264153630345305,
+      "edge_gain_db": 0.241398201115695,
+      "temporal_gain_db": -0.11856195126493319
+    }
+  },
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