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

scripts/test_pyqt6.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+"""Test liveview avec PyQt6. Lance: python3 scripts/test_pyqt6.py"""
+import sys
+import time
+import io
+import gphoto2 as gp
+from PyQt6.QtWidgets import QApplication, QLabel, QMainWindow, QVBoxLayout, QWidget
+from PyQt6.QtCore import QThread, pyqtSignal, Qt
+from PyQt6.QtGui import QPixmap, QImage
+
+
+class PreviewThread(QThread):
+    frame_ready = pyqtSignal(bytes, float)
+    premier_frame_signal = pyqtSignal(float)
+
+    def __init__(self, cam):
+        super().__init__()
+        self.cam = cam
+        self._running = True
+        self._premier = False
+
+    def run(self):
+        t_start = time.time()
+        while self._running:
+            try:
+                t0 = time.time()
+                f = self.cam.capture_preview()
+                data = bytes(f.get_data_and_size())
+                dt = time.time() - t0
+                if not self._premier:
+                    self._premier = True
+                    self.premier_frame_signal.emit(time.time() - t_start)
+                self.frame_ready.emit(data, dt)
+            except Exception as e:
+                print(f"Erreur preview: {e}")
+                break
+
+    def stop(self):
+        self._running = False
+
+
+class MainWindow(QMainWindow):
+    def __init__(self, cam):
+        super().__init__()
+        self.setWindowTitle("Test liveview PyQt6")
+        self.resize(960, 640)
+        self.t_start = time.time()
+        self.frame_count = 0
+
+        self.label_img = QLabel()
+        self.label_img.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.label_info = QLabel("Attente premiere image...")
+        self.label_info.setStyleSheet("color: yellow; background: black; font-size: 18px; padding: 5px;")
+
+        layout = QVBoxLayout()
+        layout.addWidget(self.label_img)
+        layout.addWidget(self.label_info)
+        widget = QWidget()
+        widget.setLayout(layout)
+        self.setCentralWidget(widget)
+
+        self.thread = PreviewThread(cam)
+        self.thread.frame_ready.connect(self.on_frame)
+        self.thread.premier_frame_signal.connect(self.on_premier)
+        self.thread.start()
+
+    def on_premier(self, t):
+        print(f"1ere image en : {t:.2f}s")
+
+    def on_frame(self, data, dt):
+        self.frame_count += 1
+        img = QImage.fromData(data)
+        pix = QPixmap.fromImage(img).scaled(960, 600, Qt.AspectRatioMode.KeepAspectRatio)
+        self.label_img.setPixmap(pix)
+        fps = self.frame_count / (time.time() - self.t_start)
+        self.label_info.setText(f"FPS: {fps:.1f}  frame: {dt*1000:.0f}ms  total frames: {self.frame_count}")
+
+    def closeEvent(self, e):
+        self.thread.stop()
+        self.thread.wait()
+        super().closeEvent(e)
+
+
+cam = gp.Camera()
+cam.init()
+print("Camera connectee")
+
+app = QApplication(sys.argv)
+win = MainWindow(cam)
+win.show()
+ret = app.exec()
+cam.exit()
+sys.exit(ret)