VO Video Output Demo#

Overview#

This sample demonstrates how to use the K230 VO (Video Output) module for video output. The VO module supports multiple output devices and display modes.

Functional Description#

VO Functions#

This sample demonstrates the following VO output capabilities:

multiple output devices
multiple display modes
scaling support
configurable frame rate
color-space configuration

Supported Output Devices#

HDMI output
LCD output
MIPI output
BT1120 digital output

Display Characteristics#

resolution support
refresh rates such as 60 Hz and 50 Hz
aspect ratios such as 16:9 and 4:3
color spaces such as BT.601 and BT.709

Source Location#

Demo source path: src/rtsmart/examples/mpp/sample_vo_video

Usage#

Build Method#

In the K230 RTOS SDK root directory, run make menuconfig, enable the VO video-output sample, then rebuild the firmware.

Run Example#

./sample_vo_video <connector_type> [options]

Parameter Description#

Parameter	Description	Range
`connector_type`	connector type	HDMI (101), LCD (20), MIPI, etc.
`width`	output width	128-3840
`height`	output height	64-2160
`frame_rate`	output frame rate	24-60

Expected Result#

After running, the sample will:

initialize VO
configure the output device
configure output parameters
start video output
support dynamic parameter tuning

Example output:

VO Video Output Demo
====================

Initializing VO module...
VO initialized successfully

Configuring output device...
Connector type: 101 (HDMI)
Output resolution: 1920x1080
Frame rate: 60Hz

Starting video output...
Video output started!

Display info:
Resolution: 1920x1080
Refresh rate: 60Hz
Color space: BT.601
Aspect ratio: 16:9

Use keys to change output settings:
[1] Change resolution
[2] Change frame rate
[3] Change color space
[Q] Quit

Press Ctrl+C to exit.

Tip

Use list_connector to check supported connector types and enum values. For VO APIs, refer to Display Output API.