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VideoFrame: allocationSize() method - Web APIs | MDN
allocationSize()
allocationSize(options)
options Optional
An object containing the following:
rect Optional
The rectangle of pixels to copy from the VideoFrame. If unspecified the visibleRect
x: The x-coordinate.y: The y-coordinate.width: The width of the frame.height: The height of the frame.
layout Optional
A list containing the following values for each plane in the VideoFrame. Planes may not overlap. If unspecified the planes will be tightly packed:
offset
An integer representing the offset in bytes where the given plane begins.
stride
An integer representing the number of bytes, including padding, used by each row of the plane.
format Optional
A pixel format for the pixel data in the destination. Can be set to "RGBA", "RGBX", "BGRA", "BGRX". If unspecified, the format
colorSpace Optional
Specifies the color space of the pixel data in the destination. Can be set to "srgb" for the sRGB color space or "display-p3" for the display-p3 color space . Only applicable for RGB pixel formats. If unspecified, "srgb will be used.
An integer containing the number of bytes needed to hold the frame as specified by options.
In the following example the allocationSize is returned for the rectangle at top left with dimensions of 800 by 600.
const videoRect = {
x: 0,
y: 0,
width: 800,
height: 600,
};
let size = VideoFrame.allocationSize({ rect: videoRect });
