About Optibase capture card chip performance issues

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Hi everyone, I want to buy a capture card. A treacherous businessman in Shanghai, China, flickered me to buy an Optibase MEPG 9500. This person told me that it was a publisher and had six lines of digital filters. (My heart is ideal, the performance and function of capture is made up of its IC combination, there is the software. I have a friend told me, S-VIDEO capture card seldom 1080, he recommended me to buy canopus DVX. But It seems that this is EDUS to AVI, and not as powerful as NTSC IODATA. Simple sort of the capture card components and functions (need to be amended), we look at these several products which is good, there is no better product than optibase? Is decklink It is said that 4k, we recommend that I buy a capture card, or DV transformation S-video native interface.

[280634157]

DATASHEET??? which better？