def present(self, frame: QVideoFrame) -> bool:
if not frame.isValid():
return False
image_format = QVideoFrame.imageFormatFromPixelFormat(frame.pixelFormat())
if image_format == QVideoFrame.Format_Invalid:
_logger.info(_('QR code scanner for video frame with invalid pixel format'))
return False
if not frame.map(QAbstractVideoBuffer.ReadOnly):
_logger.info(_('QR code scanner failed to map video frame'))
return False
try:
img = QImage(frame.bits(), frame.width(), frame.height(), image_format)
# Check whether we need to flip the image on any axis
surface_format = self.surfaceFormat()
flip_x = surface_format.isMirrored()
flip_y = surface_format.scanLineDirection() == QVideoSurfaceFormat.BottomToTop
# Mirror the image if needed
if flip_x or flip_y:
img = img.mirrored(flip_x, flip_y)
# Create a copy of the image so the original frame data can be freed
img = img.copy()
finally:
frame.unmap()
self.frame_available.emit(img)
return True
def present(self, frame: QVideoFrame):
print("present called")
if frame.isValid():
clone_frame = QVideoFrame(frame)
clone_frame.map(QAbstractVideoBuffer.ReadOnly)
image = QImage(clone_frame.bits(), frame.width(), frame.height(), frame.bytesPerLine(), \
QVideoFrame.imageFormatFromPixelFormat(frame.pixelFormat()))
clone_frame.unmap()
self.frame_available.emit(image)
if self.surfaceFormat().pixelFormat() != frame.pixelFormat() or \
self.surfaceFormat().frameSize() != frame.size():
self.setError(QAbstractVideoSurface.IncorrectFormatError)
self.stop()
print("present finished: Return False")
return False
else:
self.current_frame = frame
print("present finished: Return True")
return True
def present(self, frame: QVideoFrame):
"""
Called by the video player
:param frame: frame to present
"""
if frame.isValid():
clone_frame = QVideoFrame(frame)
clone_frame.map(QAbstractVideoBuffer.ReadOnly)
image = QImage(
clone_frame.bits(), clone_frame.width(), clone_frame.height(),
QVideoFrame.imageFormatFromPixelFormat(
clone_frame.pixelFormat()))
self.frameAvailable.emit(image)
clone_frame.unmap()
if self.surfaceFormat().pixelFormat() != frame.pixelFormat(
) or self.surfaceFormat().frameSize() != frame.size():
self.setError(self.IncorrectFormatError)
self.stop()
return False
else:
self.currentFrame = frame
self.widget.repaint()
return True
def present(self, frame: QVideoFrame):
if frame.isValid():
self.conversion_thread.process_frame(frame)
return True
return False
