fix(zerogpu-video): convert float32 numpy frames to uint8 before PIL save

app.py

@@ -1310,7 +1310,13 @@ def generate_zerogpu_video(
         with tempfile.TemporaryDirectory() as tmpdir:
             for idx, frame in enumerate(video_frames):
                 if isinstance(frame, np.ndarray):
-                    img = Image.fromarray(frame)
+                    f_arr = frame
+                    if f_arr.dtype in (np.float32, np.float64, np.float16):
+                        if f_arr.max() <= 1.0:
+                            f_arr = (f_arr * 255.0).clip(0, 255).astype(np.uint8)
+                        else:
+                            f_arr = f_arr.clip(0, 255).astype(np.uint8)
+                    img = Image.fromarray(f_arr)
                 else:
                     img = frame
                 img.save(os.path.join(tmpdir, f"frame_{idx:05d}.png"))