Video decoding display

1. Preparation

This example decoder2display implements the decoding of video files and outputs them through the HDMI interface. Users can preview the images on the display.

The example flow chart is as follows.

• Connect the board to the monitor via HDMI cable
• Power on the board and log in
• Prepare the video encoding file test.h264 as input.

2. Running method

The sample code is provided in source code form and needs to be compiled and run using the make command.

The steps are as follows.

sunrise@ubuntu:~$ cd /app/cdev_demo/decode2display
sunrise@ubuntu:/app/cdev_demo/decode2display$ cp  /app/cdev_demo/vio2encoder/test.h264 .
sunrise@ubuntu:/app/cdev_demo/decode2display$ sudo make
sunrise@ubuntu:/app/cdev_demo/decode2display$ sudo ./decoder2display -w 1920 -h 1080 -i test.h264

The following command copies the test.h264 file saved in [3. Camera image encoding] to the current directory for use.

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cp  /app/cdev_demo/vio2encoder/test.h264 .

Parameter Description.

• -h: video file height
• -w: video file width
• -i: video file path

3. Result

After the program runs correctly, the video screen will be output through the HDMI interface of the development board, and the user can preview the video screen through the monitor.

The running log is as follows.

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sunrise@ubuntu:/app/cdev_demo/decode2display$ sudo ./decoder2display -w 1920 -h 1080 -i test.h264
disp_w=1024, disp_h=600
[x3_av_open_stream]:[380]:probesize: 5000000
sp_start_decode success!
libiar: hb_disp_set_timing done!
sp_start_display success!
sp_open_vps success!