Scripts test liveview : pygame, pyqt6, opencv, tkinter - mesure FPS et premiere image

scripts/test_pygame.py

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+#!/usr/bin/env python3
+"""Test liveview avec Pygame. Lance: python3 scripts/test_pygame.py"""
+import time
+import io
+import gphoto2 as gp
+import pygame
+
+cam = gp.Camera()
+cam.init()
+print("Camera connectee")
+
+pygame.init()
+screen = pygame.display.set_mode((960, 640))
+pygame.display.set_caption("Test liveview Pygame")
+clock = pygame.time.Clock()
+font = pygame.font.SysFont(None, 36)
+
+t_start = time.time()
+frame_count = 0
+premier_frame = None
+
+running = True
+while running:
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE):
+            running = False
+
+    try:
+        t0 = time.time()
+        f = cam.capture_preview()
+        data = bytes(f.get_data_and_size())
+        dt = time.time() - t0
+
+        if premier_frame is None:
+            premier_frame = time.time() - t_start
+            print(f"1ere image en : {premier_frame:.2f}s")
+
+        img_surface = pygame.image.load(io.BytesIO(data))
+        img_surface = pygame.transform.scale(img_surface, (960, 640))
+        screen.blit(img_surface, (0, 0))
+
+        frame_count += 1
+        fps = frame_count / (time.time() - t_start)
+        txt = font.render(f"FPS: {fps:.1f}  frame: {dt*1000:.0f}ms", True, (255, 255, 0))
+        screen.blit(txt, (10, 10))
+        pygame.display.flip()
+
+    except Exception as e:
+        print(f"Erreur: {e}")
+        break
+
+    clock.tick(30)
+
+cam.exit()
+pygame.quit()
+print(f"Total frames: {frame_count}, FPS moyen: {frame_count/(time.time()-t_start):.1f}")