epiphan video Pearl-2, Руководство пользователя

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Pearl-2 User Guide Performance considerations
Performance considerations
Chroma keying can impact the performance of Pearl-2 depending on factors such as how many chroma key
sources you add, if you scale the chroma key video source using the custom layout editor, and your frame
rate.
For best performance, avoid excessive scaling of video sources that have chroma keying enabled. Cropping
video sources that have chroma keying enabled helps reduce processing and optimizes the performance of
Pearl-2.
You can monitor the performance of Pearl-2 from the Info tab using the Admin panel for the custom channel
that has chroma keying enabled. For more information about performance monitoring, see What is Pearl-2? .
Observe the following:
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For Pearl-2, the maximum resolution is 1920×1080 at 30 fps for chroma keying.
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Avoid scaling a video source that has chroma key enabled.
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Where possible, crop the video source that has the chroma key enabled to minimize the area that Pearl-
2 must process for the chroma key effect.
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Overloading the Pearl-2 processor can cause frame drops.
What is upstream chroma keying?
Upstream chroma keying applies the chroma key effect to a specific video source before it's processed,
switched, and broadcast.
For example, you could display the name of a guest using titler software on only the camera that is dedicated
for close ups of that person but not on any of your other video sources.
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