Tool/software: TI-RTOS
HI
Now we need to encode 2*1080p@30fps H264 stream, which will use VPE and IVA commonpont.
And also we need to Display two 2*1080p@30fps videos(VID pipe res is 1920*1080 ,and LCD res is 1920*600).
However,it seems that the DDR bandwidth is limited, when vpe and iva process 2*1080p@30fps videos,some frames will be lost.
Our DDR is 2*16bits running at 666MHz,which bandtdh is about 5GB/s.
And I do some calculation about the theoretical band Width in my case. In my case , it cost 2GB/s, smaller than 5GBs/2.
And I test the bandwidth using the omapconf tools.
Strangely, the VPE module cost about 336MB/s (672MB/s for 2*1080p@30fps)bandwith,which is higher than the theoretical value
(1920*1080*30 *2 + 1920*1080*3/2*30 = 118m + 90MB = 208MB). Is this value is correct?
Theoretically, the DDR bandwidth is engough to do this process, but in our case there a serious loss of frames.
Please help take a look.
