We are developing some vodeo algrithms on DM8168 and the algrithm is sensitive to frame interval. The video source is PAL 50Hz CVBS signal. But we found the frame interval of incoming data in DSP link is varied but all of them are multiple of 16ms, i.e., the frame interval is either 32ms or 48ms. But the printed fps is right (25fps).
I tracked the code to capture link and found the frame interval in caputure link is same as above. Certainly, in the capture link the fps means field rate, which is 50fps. And here the field interval is either 16ms or 32ms.
In a PAL system, the field rate should be 50fps and field interval should be 20ms. Why it is 16ms in the DVR RDK Kit and how can I change it to get the right field interval?
Dongming
