Grab screen of OMAP3530

Other Parts Discussed in Thread: OMAP3530Hi, all I am using OMAP3530 EVM. I want to grab the screnn, just like snapshot or print screen on Windos, and then encode it. From the PSP User Guide, I found that DSS of omap3530 have three pipelines, one is graphic pipeline fof GUI, and the other two are video pipeline. What I really want is all the data displayed on LCD, but it seemed that there is no access to get the data output by other applications wiht v4l2 pipeline. So, I want to know: 1.Can I get each pixel value displayed on LCD, which may be output by other application though fb or vdieo , especially though vidoe pipeline(V4L2)??? 2.Now, I just can get the data in graphic pipeline though framebuffer mmap. But memcpy is so slow, and I have to convert RGB565 to UYVY to give it to DSP to encode. I just grab screen(640x480) 5 fps. I is too slow, so HOW CAN I GRAB FRAMEBUFFER QUICKLY, AND CONVERT RGB565 TO UYVY QUICKLY? Thanks