Frame rate conversion issue

Hi all,

While waiting for any response from the experts I resumed struggling with the issue myself in a more or less brute force way. One of the things I tried in the mean time is enabling the option "locked frame rate conversion" from the frame buffer IP. Using the console from Quartus (jtag) I then write to the frame buffer control registers: input_frame_rate=36, output_frame_rate=60, controlled_rate_conversion=1 (true), control=1 (go). Instead of having a black screen I see something happening: I see what is presented in image2 but instead of having this test pattern blended in nicely I see flickering colors at the area of where the test pattern should be. I can also see that frames are dropped by reading the dropped frames register from the frame buffer.

Once again, any help is appreciated on this..

Thanks in advance.