PVIDEO_READ_DATA_LINE PvideoReadDataLine;BOOLEANPvideoReadDataLine( PVOID HwDeviceExtension ){...} 参数 HwDeviceExtension 指向微型端口驱动程序的每个适配器存储区域的指针。 有关详细信息,请参阅设备扩展。 返回值 如果串行数据行较高,ReadDataLine返回 1,
v = VideoReader(filename,Name,Value) Description v = VideoReader(filename) creates object v to read video data from the file named filename. example v = VideoReader(filename,Name,Value) sets the properties CurrentTime, Tag, and UserData using name-value arguments. For example, VideoReade...
video = read(v,index) 只读取 index 指定的帧。 video = read(___,'native') 以 VideoFormat 属性指定的格式返回数据,并且可以包含上述语法中的任何输入参数。 创建一个视频读取器对象,并使用帧索引读取一个或多个视频帧。为示例影片文件 abc.mp4 创建一个VideoReader 对象。 v = VideoReader('abc.mp4'...
PVIDEO_READ_CLOCK_LINE PvideoReadClockLine;BOOLEANPvideoReadClockLine( PVOID HwDeviceExtension ){...} Parameters HwDeviceExtension Pointer to the miniport driver's per-adapter storage area. For more information, seeDevice Extensions. Return value ...
Read Video Frames Using Frame Index Copy Code Copy Command Create a VideoReader object for the sample video file xylophone_video.mp4. Get v = VideoReader("xylophone_video.mp4"); Read only the first video frame. Get firstFrame = read(v,1); Read only the last video frame. Get last...
Read Video Frames Using Frame Index Copy Code Copy Command Create a VideoReader object for the sample video file xylophone_video.mp4. Get v = VideoReader("xylophone_video.mp4"); Read only the first video frame. Get firstFrame = read(v,1); Read only the last video frame. Get last...
read() if ret == True: # Display the resulting frame cv2.imshow('Frame',frame) # Press Q on keyboard to exit if cv2.waitKey(25) & 0xFF == ord('q'): break # Break the loop else: break # When everything done, release the video capture object cap.release() # Closes all the...
PVIDEO_HW_START_IO callback function PVIDEO_HW_TIMER callback function PVIDEO_PORT_GET_PROC_ADDRESS callback function PVIDEO_READ_CLOCK_LINE callback function PVIDEO_READ_DATA_LINE callback function PVIDEO_WRITE_CLOCK_LINE callback function PVIDEO_WRITE_DATA_LINE callback function QUERY_INTERFA...
VideoPortReadPortUshort會傳回從配接器讀取的 USHORT 值。 言論 迷你埠驅動程式的HwVidInterrupt或HwVidSynchronizeExecutionCallback函式可以呼叫VideoPortReadPortUshort。 VideoPortReadPortUshort的呼叫端可以在任何 IRQL 上執行,前提是Port參數所指向的記憶體是常駐的對應裝置記憶體。
VideoPortReadRegisterUchar 返回从适配器读取的字节。 言论 微型端口驱动程序的 HwVidInterrupt 或HwVidSynchronizeExecutionCallback 函数可以调用 VideoPortReadRegisterUchar。 VideoPortReadRegisterUchar 的调用方可以在任何 IRQL 上运行,前提是 Register 参数指向的内存是驻留的映射设备内存。 要求 展开表 要求价值 最...