Video locked in landscapre but not in portrait mode

[pgrangeray]

Hi,

I'm back :(

I use "AXI4 to video out" for SDI stream video (with SDI to Video bride -> Video to AXI4 -> YCbCr to RGB -> AXI4 to Video and a Video Timing Controler/Generator).

At the final I can lock and get Hsync and Vsync only in landscape mode (1920*1080). When I switch to portrait ( I use my computer), i get an underflow ! 

Any suggestions?

Thanks

[florentw · Accepted solution]

Hi @pgrangeray,

I would use a VDMA or speed up your stream clock.

I guess when you use 1080 x 1920 (portrait) the HSYNC and HMARGIN are slightly reduced compared to 1920 x 1080 (landscape). So you might need a stream a bit more faster.

But this is only a guess.

Regards,

Florent

[pgrangeray]

Thank you for you reply.
It seems to work now.
I don't know how, but it's OK.