Sorry to dig this one up, but I am currently having the exact same issue with the component input and my capture card. The picture looks much better in passthru mode on the OSSC, but it only displays half of the picture. I am on FW 0.73 currently, and I’m using the SC512n1-L as well. (I’ll have the latest firmware once my 2gb micro sd card comes in the mail, so I apologize if this issue has been corrected already.)
I’ve had no issues with analog input to the capture card in 480i using the component breakout cable, but from the OSSC it just doesn’t seem to work properly. I’ve tried a lot of settings in both Amarec and OBS. Has anyone found a solution to this yet? I’m about to try using MPCHC to try to correct the issue, but it seems to be a capture card or OSSC issue. Let me know if you need more specific info.