feat(content): swap cosmos Orion to a text-free SVS flythrough

Replaces the JPL "Orion: Dust and Death" primary (captioned throughout — we'd
cropped it, losing framing) with STScI's "Flight Through the Orion Nebula"
(visible light, NASA SVS 30957) — a full-frame, text-free flythrough of the same
nebula. Sourced via the content pipeline (trim 10–34s + crossfade-loop → 1080p
master + base); cosmos-orbit / abyss-cosmos transitions regenerated from it.

- build_pool_manifest META: cosmos -> SVS 30957, license CC-BY-class (NASA/ESA/
  STScI), new trim window.
- Remove the now-obsolete decaption_cosmos() crop helper (the new source needs
  no caption removal).
- docs/content-candidate-pool.md: record the source swap; drop the crop note.

269 passed, 2 skipped. New clip verified text-free + full-frame by-eye;
final look to be confirmed by the operator.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/content-candidate-pool.md

@@ -27,25 +27,24 @@ stays non‑commercial**.
 
 | id | clip | source | window (s) | license / credit |
 |----|------|--------|-----------|------------------|
-| `cosmos` | Orion Nebula flythrough | NASA/JPL‑Caltech — https://images.nasa.gov/details/JPL-20221122-SOLSYSf-0001-Orion%20Dust%20and%20Death | ~30–54 | PD (17 U.S.C. §105) |
+| `cosmos` | Orion Nebula flythrough | NASA SVS 30957 — https://svs.gsfc.nasa.gov/30957/ (`orion_vis-1920x1080.mp4`, *Flight Through the Orion Nebula*, visible light) | 10–34 | CC‑BY‑class — credit **NASA, ESA, STScI** |
 
-> ⚠️ **Orion is NOT text-free.** The source is the *annotated* "Orion: Dust and
-> Death" visualization — NASA burns lower-third captions in throughout
-> ("DUST FILAMENT", "BLUE BUBBLE", …), so trimming can't avoid them. We crop past
-> them: `simulator/build_pool_manifest.py:decaption_cosmos()` keeps the top 66% of
-> the frame (16:9 preserved, ~1.5× tighter framing) and re-fits to 1920×1080. Run
-> it ONCE after (re)sourcing the Orion clip, then re-run `generate_media()` so the
-> cosmos-orbit / abyss-cosmos transitions use the cropped base.
+> ℹ️ **Orion source swapped to a text-free clip (2026-06-25).** The original
+> primary was NASA/JPL's *"Orion: Dust and Death"* — an annotated visualization
+> with lower-third captions ("DUST FILAMENT", "BLUE BUBBLE", …) burned in
+> throughout, so trimming couldn't avoid them and a crop lost framing. Replaced
+> with STScI's **Flight Through the Orion Nebula** (visible light, SVS 30957) —
+> a full-frame, text-free flythrough of the same nebula. The earlier crop helper
+> (`decaption_cosmos`) is gone; no caption removal is needed for this source.
 | `cosmos_galaxies` | Flying Through Galaxies | NASA SVS — https://svs.gsfc.nasa.gov/vis/a010000/a014900/a014950/14950_Galaxies_FlyThrough_4k.mp4 | 8–32 | PD |
 | `cosmos_hudf` | Hubble Ultra Deep Field zoom | NASA SVS — https://svs.gsfc.nasa.gov/vis/a030000/a030600/a030687/hudf-b-1920x1080p30.mov | 20–44 | CC‑BY‑class — credit **NASA, ESA, STScI** |
 | `cosmos_xdf` | eXtreme Deep Field flythrough | NASA SVS — https://svs.gsfc.nasa.gov/vis/a030000/a030600/a030681/hxdf_fly-b-1920x1080p30.mov | 2–26 | CC‑BY‑class — credit **NASA, ESA, STScI** |
 
 > ⚠️ **DISCREPANCY to fix next session.** Operator selected cosmos **#1, #3
 > (Orion), #4, #5**. During processing, **#6 Galaxy Traverse was run by mistake
-> instead of #3 Orion**. The Orion clip (#3) lives at
-> `simulator/sample_media/cosmos/base.mp4` (the prior real base), so the pool above
-> is correct — but it carries burned-in captions (see the Orion note above; now
-> cropped out). **`cosmos_traverse` is an UNSELECTED extra on disk — drop it** (or
+> instead of #3 Orion**. The cosmos primary now lives at
+> `simulator/sample_media/cosmos/base.mp4` as the text-free SVS 30957 flythrough
+> (see the Orion note above). **`cosmos_traverse` is an UNSELECTED extra on disk — drop it** (or
 > confirm with operator). The current ring scale id is `cosmos`; when the pool is
 > wired, `cosmos` becomes one pool member.
 

simulator/build_pool_manifest.py

@@ -55,8 +55,9 @@ CCBY_STSCI = "CC-BY-class — credit NASA, ESA, STScI"
 # --- Per-clip provenance: id -> (title, license, source) ---
 META: dict[str, tuple[str, str, str]] = {
     # cosmos
-    "cosmos": ("Orion Nebula flythrough (NASA/JPL-Caltech)", PD,
-               "NASA/JPL-Caltech — images.nasa.gov JPL-20221122-SOLSYSf-0001 (Orion); trim ~30–54s, crossfade-loop"),
+    "cosmos": ("Orion Nebula flythrough (NASA/ESA/STScI)", CCBY_STSCI,
+               "NASA SVS 30957 orion_vis-1920x1080 (Flight Through the Orion Nebula, visible light); "
+               "trim 10–34s, crossfade-loop. Text-free — replaces the captioned JPL 'Dust and Death' clip."),
     "cosmos_galaxies": ("Flying Through Galaxies (NASA SVS)", PD,
                         "NASA SVS a014950 14950_Galaxies_FlyThrough_4k; trim 8–32s, crossfade-loop"),
     "cosmos_hudf": ("Hubble Ultra Deep Field zoom (NASA/ESA/STScI)", CCBY_STSCI,
@@ -408,35 +409,6 @@ def generate_media() -> None:
         print(f"generated transitions/{a}-{b}.mp4 (+ .rev) from real bases")
 
 
-# Fraction of frame HEIGHT kept (from the top) to drop the NASA burned-in
-# lower-third captions on the cosmos Orion clip ("DUST FILAMENT", "BLUE BUBBLE",
-# …). The "Orion: Dust and Death" visualization is captioned throughout, so
-# trimming can't avoid them — we crop past them instead. ~1.5x tighter framing.
-COSMOS_CAPTION_KEEP = 0.66
-
-
-def decaption_cosmos() -> None:
-    """Re-crop the cosmos Orion base/master IN PLACE to remove NASA's burned-in
-    lower-third caption band, keeping 16:9 (crop width to match, center-x, top-
-    anchored) then re-fitting to 1920x1080. Run ONCE after (re)sourcing the Orion
-    clip — re-running would crop again. Media is gitignored, so this is the
-    recorded, reproducible form of the operation."""
-    ff = _ffmpeg()
-    f = COSMOS_CAPTION_KEEP
-    vf = f"crop=iw*{f}:ih*{f}:iw*{(1 - f) / 2}:0,scale=1920:1080"
-    for name, crf in (("base", "20"), ("master", "18")):
-        p = MEDIA / "cosmos" / f"{name}.mp4"
-        if not p.exists():
-            continue
-        tmp = p.with_suffix(".decap.mp4")
-        subprocess.run([
-            ff, "-y", "-i", str(p), "-vf", vf,
-            "-c:v", "libx264", "-crf", crf, "-pix_fmt", "yuv420p", "-an", str(tmp),
-        ], check=True, capture_output=True)
-        tmp.replace(p)
-        print(f"de-captioned cosmos/{name}.mp4 (kept top {int(f * 100)}%)")
-
-
 def main(argv: list[str]) -> None:
     manifest = build_manifest()
     MANIFEST.write_text(json.dumps(manifest, indent=2, ensure_ascii=False) + "\n")