from PySide6.QtWidgets import ( QWidget, QVBoxLayout, QLabel, QSizePolicy, QGraphicsView, QGraphicsScene ) from PySide6.QtCore import Qt, Signal, QSize from PySide6.QtGui import QPixmap, QImage, QPainter import cv2 import numpy as np class SimpleLiveDisplay(QWidget): """Enhanced implementation for video display using QGraphicsView""" video_dropped = Signal(str) # For drag and drop compatibility def __init__(self): super().__init__() self.layout = QVBoxLayout(self) self.layout.setContentsMargins(0, 0, 0, 0) # Create QGraphicsView and QGraphicsScene self.graphics_view = QGraphicsView() self.graphics_scene = QGraphicsScene() self.graphics_view.setScene(self.graphics_scene) self.graphics_view.setMinimumSize(640, 480) self.graphics_view.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding) self.graphics_view.setStyleSheet("background-color: black;") self.graphics_view.setRenderHint(QPainter.Antialiasing) self.graphics_view.setRenderHint(QPainter.SmoothPixmapTransform) # Create backup label (in case QGraphicsView doesn't work) self.display_label = QLabel() self.display_label.setAlignment(Qt.AlignCenter) self.display_label.setMinimumSize(640, 480) self.display_label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding) self.display_label.setStyleSheet("background-color: black;") # Set up drag and drop self.setAcceptDrops(True) # Add QGraphicsView to layout (primary display) self.layout.addWidget(self.graphics_view) # Don't add label to layout, we'll only use it as fallback if needed def update_frame(self, pixmap): """Update the display with a new frame""" if pixmap and not pixmap.isNull(): print(f"DEBUG: SimpleLiveDisplay updating with pixmap {pixmap.width()}x{pixmap.height()}") try: # Method 1: Using QGraphicsScene self.graphics_scene.clear() self.graphics_scene.addPixmap(pixmap) self.graphics_view.fitInView(self.graphics_scene.itemsBoundingRect(), Qt.KeepAspectRatio) # Force an immediate update self.graphics_view.update() self.repaint() # Force a complete repaint print("DEBUG: SimpleLiveDisplay - pixmap displayed successfully in QGraphicsView") except Exception as e: print(f"ERROR in QGraphicsView display: {e}, falling back to QLabel") try: # Fallback method: Using QLabel scaled_pixmap = pixmap.scaled( self.display_label.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation ) self.display_label.setPixmap(scaled_pixmap) self.display_label.update() except Exception as e2: print(f"ERROR in QLabel fallback: {e2}") import traceback traceback.print_exc() else: print("DEBUG: SimpleLiveDisplay received null or invalid pixmap") def resizeEvent(self, event): """Handle resize events""" super().resizeEvent(event) # If we have a pixmap, rescale it to fit the new size if not self.display_label.pixmap() or self.display_label.pixmap().isNull(): return scaled_pixmap = self.display_label.pixmap().scaled( self.display_label.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation ) self.display_label.setPixmap(scaled_pixmap) def reset_display(self): """Reset display to black""" blank = QPixmap(self.display_label.size()) blank.fill(Qt.black) self.display_label.setPixmap(blank) def dragEnterEvent(self, event): """Handle drag enter events""" if event.mimeData().hasUrls(): url = event.mimeData().urls()[0].toLocalFile() if url.lower().endswith(('.mp4', '.avi', '.mov', '.mkv', '.webm')): event.acceptProposedAction() def dropEvent(self, event): """Handle drop events""" if event.mimeData().hasUrls(): url = event.mimeData().urls()[0].toLocalFile() if url.lower().endswith(('.mp4', '.avi', '.mov', '.mkv', '.webm')): self.video_dropped.emit(url) def display_frame(self, frame: np.ndarray): """Display a NumPy OpenCV frame directly (converts to QPixmap and calls update_frame)""" if frame is None: print("⚠️ Empty frame received") return # Force a debug print with the frame shape print(f"🟢 display_frame CALLED with frame: type={type(frame)}, shape={getattr(frame, 'shape', None)}") try: # Make a copy of the frame to ensure we're not using memory that might be released frame_copy = frame.copy() # Convert BGR to RGB (OpenCV uses BGR, Qt uses RGB) rgb_frame = cv2.cvtColor(frame_copy, cv2.COLOR_BGR2RGB) # Print shape info h, w, ch = rgb_frame.shape print(f"📊 Frame dimensions: {w}x{h}, channels: {ch}") # Force continuous array for QImage if not rgb_frame.flags['C_CONTIGUOUS']: rgb_frame = np.ascontiguousarray(rgb_frame) # Create QImage - critical to use .copy() to ensure Qt owns the data bytes_per_line = ch * w qt_image = QImage(rgb_frame.data, w, h, bytes_per_line, QImage.Format_RGB888).copy() # Check if QImage is valid if qt_image.isNull(): print("⚠️ Failed to create QImage") return # Create QPixmap from QImage pixmap = QPixmap.fromImage(qt_image) # METHOD 1: Display using QGraphicsScene/View try: self.graphics_scene.clear() self.graphics_scene.addPixmap(pixmap) self.graphics_view.setScene(self.graphics_scene) # Set the view to fit the content self.graphics_view.fitInView(self.graphics_scene.itemsBoundingRect(), Qt.KeepAspectRatio) # Force immediate updates self.graphics_view.viewport().update() self.graphics_view.update() print("✅ Frame displayed in QGraphicsView") except Exception as e: print(f"⚠️ Error in QGraphicsView display: {e}") # METHOD 2: Fall back to QLabel if QGraphicsView fails try: # Add to layout if not already there if self.display_label not in self.layout.children(): self.layout.addWidget(self.display_label) self.graphics_view.hide() self.display_label.show() # Scale pixmap for display scaled_pixmap = pixmap.scaled( max(self.display_label.width(), 640), max(self.display_label.height(), 480), Qt.KeepAspectRatio, Qt.SmoothTransformation ) self.display_label.setPixmap(scaled_pixmap) self.display_label.setScaledContents(True) self.display_label.update() print("✅ Frame displayed in QLabel (fallback)") except Exception as e2: print(f"❌ ERROR in QLabel fallback: {e2}") import traceback traceback.print_exc() except Exception as main_error: print(f"❌ CRITICAL ERROR in display_frame: {main_error}") import traceback traceback.print_exc()