When they use the PAL/NTSC output , they get aspect ratio of 5:4 instead of 4:3 which causes a round target to look like egg shape.Is there a way helping them configuring the part so they will get correct video output ?
Our encoders can't change aspect ratio or do any image manipulation-- they have no memory. What timing/data comes in is what comes out. What display is the customer trying to show it on? It sounds like a digital display treating an interlaced field as a frame. That would show as you describe.
they are using an analog screen .
what do they need to check else ?
Haven't seen one of those in years-- all they can really do is compare the input timings to output timings and make sure they are the same. There are registers that can be used to make some adjustment to them. I doubt that is the problem though.
As I said, the part can't change aspect ratio. The only possibilities are the display is choosing to show it that way for reasons we can't know, or the output timings aren't correct.
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