no- delays on blackmagic are from a totally different source-

blackmagic buffers frames when the computer is doing something else- especially when playing back a large movie at the same time....

and it can buffer up to more than 1/2 second. especially with hdsdi and playing lots of movies or a big movie.

this is totally out of my control- and variable - it changes - i have seen up to 2 seconds of buffering- which is good for video capture to disc- but not so good for doing live input.

thats because its designed to capture video onto disc with no frame drops- and the time delays through the buffer are not important for their normal users.
Latency is not a design problem for video capture to disc.

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LFG and phoenix cards dont buffer like this-

delay is constant - and is done by me and graphics card-


Quote Originally Posted by SourceChild View Post
My visual judgement is about 2-3 frames using LFG4 and 3-5 frames using 4 lane Phoenix. However, 4-6 frames on Extreme so you'll see the same issue.