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采集帧率与显示帧率不统一

Other Parts Discussed in Thread: TVP5158

为什么我的摄像头是PAL系统的,采集系统采集的时候检测到的设备是720×288 50Hz。采集帧率是25fps的帧率,但是demo运行的时候打印出来的详细信息里,显示帧率却有60fps。这是怎么回事呢?