Portable and scalable solution for off-screen video frame composition and decomposition using OpenGL ES
Sharath Bhat, Ittiam Systems Pvt. Ltd
embedded.com (December 23, 2013)
One of the most essential software components in multimedia applications like video communication, video networking, video security etc., is a video frame composition and decomposition module for off-screen surfaces. Off-screen surfaces are those video frames which are not displayed on the screen.
The video frame composition module takes in multiple video input channels. each having different attributes like pixel format, pixel resolution etc., and composites onto an output frame of single or multiple video output channels each with different attributes. When such a composited frame is encoded and transmitted from one device, on the receiving device the frame decomposition module accomplishes the reverse functionality, wherein it extracts the composed frames in the video frames of input channels.
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