SDL Video Display

Display video on a monitor connected to the NVIDIA target

Since R2020b

Add-On Required: This feature requires the MATLAB Coder Support Package for NVIDIA Jetson and NVIDIA DRIVE Platforms add-on.

• 

Libraries:
NVIDIA Jetson and NVIDIA DRIVE / Audio and Video

Description

Display video data using the Simple Directmedia Layer (SDL) multimedia library. A Simulink^® model can contain only one SDL Video Display block.

This block takes planar video data in YCbCr 4:2:2 or RGB formats.

Install the Simple DirectMedia Layer (SDL) library on the target. For more information, see Install and Setup Prerequisites for NVIDIA Boards

Examples

Deploy and Classify Webcam Images on NVIDIA Jetson Platform from Simulink

Deploy a Simulink® model on the NVIDIA® Jetson™ board for classifying webcam images. This example classifies images from a webcam in real-time by using the pretrained deep convolutional neural network, ResNet-50. The Simulink model in the example uses the camera and display blocks from the MATLAB® Coder™ Support Package for NVIDIA Jetson and NVIDIA DRIVE™ Platforms to capture the live video stream from a webcam and display the prediction results on a monitor connected to the Jetson platform.

• Open Script

Stream Camera, Depth and Semantic Segmentation Data from Unreal Engine to NVIDIA Jetson

Stream simulated camera, depth, and semantic segmentation label data from an Unreal Engine® scene to NVIDIA® Jetson™ hardware using the Video Send block in Simulink®. It then shows how to visualize incoming data streams on a monitor connected to the Jetson platform, by deploying separate models for each incoming data stream. The deployed models contain the Network Video Receive and SDL Video Display blocks from the MATLAB® Coder™ Support Package for NVIDIA Jetson and NVIDIA DRIVE® Platforms.

• Open Live Script

Ports

Input

R — Red component of the input video stream

matrix

Input port to specify red component of each pixel.

Dependencies

This port appears only when you select the RGB from Pixel format.

Data Types: uint8

G — Green component of the input video stream

matrix

Input port to specify green component of each pixel.

Dependencies

This port appears only when you select the RGB from Pixel format.

Data Types: uint8

B — Blue component of the input video stream

matrix

Input port to specify blue component of each pixel.

Dependencies

This port appears only when you select the RGB from Pixel format.

Data Types: uint8

Y — Luminance component of the input video stream

matrix

Input port to specify the luma component of each pixel.

Dependencies

This port appears only when you select the YCbCr 4:2:2 from Pixel format.

Data Types: uint8

Cb — Blue difference component of the input video stream

matrix

Input port to specify the blue difference component of each pixel.

Dependencies

This port appears only when you select the YCbCr 4:2:2 from Pixel format.

Data Types: uint8

Cr — Red difference component of the input video stream

matrix

Input port to specify the red difference component of each pixel.

Dependencies

This port appears only when you select the YCbCr 4:2:2 from Pixel format.

Data Types: uint8

Parameters

Pixel format — Input video stream format

RGB (default) | YCbCr 4:2:2

Specify the format of the input video stream: YCbCr 4:2:2 or RGB.

YCbCr 4:2:2 uses three channels to represent color image data for each pixel:

• Y is the luma component (essentially a grayscale signal).

• Cb is the blue-difference chroma component.

• Cr is the red-difference chroma component.

Cb and Cr are sampled at half the rate of Y. Therefore, if the dimensions of Y are M*N, the dimensions of Cb and Cr are each (M/2) by N.

RGB uses three 8-bit values to represent the red, green, and blue components of each pixel.

Programmatic Use

Block Parameter: pixelFormat

Type: character vector

Values: 'RGB'|'YCbCr 4:2:2'

Default: 'RGB'

Version History

Introduced in R2020b