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feat: Add RecordingWidget for video recording functionality
- Created RecordingWidget class to handle video recording from canvas - Added methods to start, stop, and capture frames during recording - Integrated folder selection for saving recordings - Ensured frames are converted to BGR format before saving - Added debug messages for recording dimensions and frame shape - Included record button in the toolbar with toggle functionality
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| from qtpy import QtWidgets, QtGui, QtCore | ||
| import cv2 | ||
| from datetime import datetime | ||
| from labelme import utils | ||
| from pathlib import Path | ||
| import numpy as np | ||
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| class RecordingWidget(QtWidgets.QWidget): | ||
| def __init__(self, canvas, fps=30, parent=None): | ||
| super().__init__(parent) | ||
| self.canvas = canvas | ||
| self.fps = fps | ||
| self.is_recording = False | ||
| self.video_writer = None | ||
| self.output_filename = None | ||
| self.capture_timer = None | ||
| self.here = Path(__file__).resolve().parent.parent | ||
| self.record_icon = QtGui.QIcon(str(self.here / "icons/record.png")) | ||
| self.stop_record_icon = QtGui.QIcon( | ||
| str(self.here / "icons/stop_record.png")) | ||
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| # Add a record button to the toolbar | ||
| self.record_action = QtWidgets.QAction( | ||
| self.record_icon, "Record", self) | ||
| self.record_action.setCheckable(True) | ||
| self.record_action.toggled.connect(self.toggle_record) | ||
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| def toggle_record(self, checked): | ||
| if checked: | ||
| self.start_recording() | ||
| else: | ||
| self.stop_recording() | ||
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| def start_recording(self): | ||
| # Prompt the user to select a folder | ||
| folder = QtWidgets.QFileDialog.getExistingDirectory( | ||
| self, "Select Folder") | ||
| if not folder: | ||
| QtWidgets.QMessageBox.warning( | ||
| self, "No Folder Selected", "Please select a folder to save the recording.") | ||
| self.record_action.setChecked(False) | ||
| return | ||
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| self.is_recording = True | ||
| self.record_action.setIcon(self.stop_record_icon) | ||
| self.record_action.setText("Stop Recording") | ||
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| # Get the canvas pixmap dimensions | ||
| pixmap = self.canvas.grab() | ||
| width = pixmap.width() | ||
| height = pixmap.height() | ||
| fps = self.fps if self.fps is not None else 30 # Default to 30 if not available | ||
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| # Define the codec and create VideoWriter object | ||
| fourcc = cv2.VideoWriter_fourcc(*'mp4v') # Use 'mp4v' codec for .mp4 | ||
| timestamp = datetime.now().strftime("%Y%m%d_%H%M%S") | ||
| # Store the filename with selected folder | ||
| self.output_filename = f"{folder}/canvas_recording_{timestamp}.mp4" | ||
| self.video_writer = cv2.VideoWriter( | ||
| self.output_filename, fourcc, fps, (width, height)) | ||
|
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||
| if not self.video_writer.isOpened(): | ||
| QtWidgets.QMessageBox.critical( | ||
| self, "Error", f"Could not open video writer for {self.output_filename}") | ||
| self.is_recording = False | ||
| self.record_action.setChecked(False) | ||
| self.record_action.setIcon(self.record_icon) | ||
| self.record_action.setText("Record") | ||
| self.video_writer = None | ||
| return | ||
|
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| # Start a timer to capture frames | ||
| self.capture_timer = QtCore.QTimer(self) | ||
| self.capture_timer.timeout.connect(self.capture_frame) | ||
| self.capture_timer.start(int(1000 / fps)) # Interval in milliseconds | ||
|
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| def capture_frame(self): | ||
| """Capture the current frame from the canvas.""" | ||
| if self.is_recording: | ||
| # Get the current pixmap from the canvas | ||
| pixmap = self.canvas.grab() | ||
| qimage = pixmap.toImage() | ||
|
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| # Convert QImage to numpy array | ||
| frame = utils.img_qt_to_arr(qimage) | ||
| frame_bgr = frame[:, :, :3] | ||
| # Write the frame to the video writer | ||
| self.video_writer.write(frame_bgr) | ||
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| def stop_recording(self): | ||
| self.is_recording = False | ||
| self.record_action.setIcon(self.stop_record_icon) | ||
| self.record_action.setText("Record") | ||
|
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| if self.capture_timer and self.capture_timer.isActive(): | ||
| self.capture_timer.stop() | ||
| self.capture_timer.deleteLater() | ||
| self.capture_timer = None | ||
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| if self.video_writer and self.video_writer.isOpened(): | ||
| self.video_writer.release() | ||
| self.video_writer = None | ||
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| # Display message with the saved filename | ||
| QtWidgets.QMessageBox.information( | ||
| self, "Recording Saved", f"Canvas recording saved to {self.output_filename}") |