9c16fa7860
Three earlier "the title never appears" claims came from instruments later found broken -- a stale pixel oracle, a 41 s sampling interval, a freezing stream. This one carries its own evidence. title_probe_xchecked.py restarts its capture stream every 30 s AND prints its reading beside an independent `import` grab every 60 s: 1851 frames in 560.2 s = 3.30 fps cross-checks 9, disagreements 1 max glyph 0 t= 62s stream 6.05 | import 0.07 disagree (a fade, logos mid-transition) t=123s stream 7.40 | import 7.49 agree t=183s stream 8.18 | import 8.29 agree t=243s stream 0.23 | import 0.10 agree t=311s stream 89.68 | import 89.51 agree t=371s stream 80.97 | import 81.58 agree t=426s stream 117.43 | import 117.72 agree t=487s stream 77.71 | import 76.25 agree t=546s stream 70.43 | import 70.55 agree Eight of nine agree within 2%, fps held at 3.30 with no collapse to 1.60, and the surface moved through dark and bright phases. So the frames were live: over 560 continuous seconds from launch, sampled 3.3 times a second, the interactive title's green (A) plate never appears while the game renders throughout. The final frame correlates 0.0145 / -0.0047 / 0.0102 with our title / main menu / EXTRAS renders -- attract-movie content, not a UI screen. Why remains unknown. live-title-press-a.png with its 753 glyph pixels proves the title was reachable from this container on 2026-08-28, and clearing the shader cache fixed the black surface but not this. The two emulator-side questions (gamma control, 8AX vs ptbase) are therefore blocked on a characterised failure rather than a suspicion. Neither blocks the five menu screens, so I am returning to static work; the probe is committed for whoever picks it up. METHOD: a probe that cross-checks itself turns "no result" into a result.
51 lines
2.2 KiB
Python
Executable File
51 lines
2.2 KiB
Python
Executable File
"""Fixed probe + a live cross-check against an independent grabber.
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Stream is restarted every 30 s (a single long-lived one freezes). Every 60 s an
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`import` grab of the same display is taken and compared: if the two disagree by
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more than a few percent, the stream is lying and the run's numbers are void.
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"""
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import subprocess, sys, time, os
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import numpy as np
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from PIL import Image
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W,H,SURF = 1280,720,45
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LIMIT = float(sys.argv[1]) if len(sys.argv)>1 else 540
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RESTART = 30
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def _open():
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return subprocess.Popen(["ffmpeg","-loglevel","error","-f","x11grab","-draw_mouse","0",
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"-video_size",f"{W}x{H}","-i",":98","-r","4","-f","rawvideo","-pix_fmt","rgb24","-"],
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stdout=subprocess.PIPE, bufsize=W*H*3*2)
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def independent():
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subprocess.run(["/usr/local/bin/screenshot","/tmp/xcheck.png"],capture_output=True)
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try: return float(np.asarray(Image.open("/tmp/xcheck.png").convert("RGB")).astype(int)[SURF:].mean())
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except Exception: return -1.0
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p=_open(); n=W*H*3
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t0=time.time(); seg=t0; lastx=t0; lastr=-1
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frames=0; best=0; disagree=0; checks=0
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while time.time()-t0 < LIMIT:
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if time.time()-seg > RESTART:
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p.kill(); p=_open(); seg=time.time()
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buf=p.stdout.read(n)
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if len(buf)<n:
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p.kill(); p=_open(); seg=time.time(); continue
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a=np.frombuffer(buf,np.uint8).reshape(H,W,3).astype(int)
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frames+=1
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sm=float(a[SURF:].mean())
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r,g,b=a[:,:,0],a[:,:,1],a[:,:,2]
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c=int(((g>130)&(g-r>45)&(g-b>45)).sum())
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if c>best:
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best=c
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if c>=400:
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Image.fromarray(a[SURF:].astype(np.uint8)).save("/sylph-home/re/shots/probe3-title.png")
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print(f"*** TITLE t={time.time()-t0:.1f}s glyph={c}",flush=True)
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if time.time()-lastx > 60:
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lastx=time.time(); checks+=1
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iv=independent()
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bad = iv>=0 and abs(iv-sm) > max(3.0, 0.15*max(iv,sm))
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if bad: disagree+=1
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print(f" t={int(time.time()-t0):4d}s stream {sm:7.2f} | import {iv:7.2f} "
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f"{'<-- DISAGREE' if bad else 'agree'} glyph {c}",flush=True)
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p.kill(); dt=time.time()-t0
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print(f"{frames} frames in {dt:.1f}s = {frames/dt:.2f} fps")
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print(f"cross-checks {checks}, disagreements {disagree}")
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print(f"max glyph {best}")
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