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Thanks for the responses!
The OSSC LCD will tell you what kind of signal it’s receiving. Specifically, the i or p immediately following the line count will tell you whether it’s receiving an interlaced or progressive signal respectively.
Ok, I just checked the input signal and it’s 264p so that rules out the interlace theory I think.
Also, if the framerate of the board is very far from standard 50hz/60hz, stuttering may be caused by framerate conversion performed by your card/TV. Try setting your capture to the exact framerate the OSSC reports.
Otherwise, I wouldn’t rule out it’s still some type of sync issue.
It’s a standard 60hz signal. The OSSC reads it at 59.18Hz.