Epiphan AV.io HD - Manual (Page 10)

AV.io HD User Guide – How AV.io HD works
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How AV.io HD works
Once you’re ready to start capturing, you’ll need either a built-in or third-party application to capture video
content with AV.io HD. The application will communicate with AV.io HD and negotiate a frame rate (frequency
at which frames in a video sequence are displayed) and frame size (size of a single video frame in pixels).
Resolutions and capture rates
The display resolution or display modes of a TV, computer monitor or display device is the number of distinct
pixels in each dimension that can be displayed.
AV.io HD generates a list of the following possible resolutions for your capture application to select for output
display:
640×360 848×480 1024×768 1280×1024 1920×1080
640×480 960×540 1280×720 1600×1200 1920×1200
Captured video content outputs to your application at 15, 30 or 60 frames per second.
Aspect ratios
The aspect ratio of an image describes the proportional relationship between its pixel width and height.
AV.io HD outputs resolutions in many commonly supported aspects ratios, color-coded according to table of
resolutions above and described in the table below:
4:3 16:9 16:10 (8:5) 5:4
Aspect Ratio Common Use
4:3 Standard letterbox TV display and non-widescreen computer displays
16:9 Widescreen (HD) TV displays (1080p, 1080i, 720p etc)
16:10 (8:5) Widescreen computer displays
5:4 Sometimes used in larger format computer monitors