Run using QDemo Application - Qualcomm Dragonwing Documentation

Currently, the Qdemo application isn’t supported through the GUI launcher icon. Launch the Qdemo application using the device terminal.

The Qualcomm^® Dragonwing^TM IQ-8275 Evaluation Kit (EVK) is preinstalled with Qdemo, a graphical user interface (GUI) application designed to run sample applications without a host setup. The Qdemo application allows you to experience the AI and multimedia capabilities of the development kit with just a few clicks. Qualcomm Linux^® provides the following types of sample applications for use cases such as retail, Qualcomm Edge AI Box Solutions, and IP camera:

Multimedia sample applications, which show camera, video, and audio functionalities.
AI sample applications, which show AI and machine learning (ML) capabilities.

The following table lists the sample applications that you can run using Qdemo. For the complete list of available applications, see Sample applications. Table: List of applications supported in Qdemo

Application	Description
Multimedia applications
DashCamera	Streams from two camera sensors simultaneously and displays the feeds side by side on a screen. This application is suitable for dash cameras or stereo camera use cases, which require capturing videos from multiple cameras for viewing or archiving.
Record live video	Records camera feed and saves videos up to 30 sec. This application uses a single camera that supports outputs such as preview and encoding.
VideoWall	Plays MP4 AVC (H.264) videos concurrently and composes them on a video wall display. Before running this application, ensure that you have a recorded video or record one using the evaluation kit.
AI applications
Daisychain Pose	Performs cascaded object detection and classification on the images streamed from a camera.
FaceDetection	Processes inputs from a camera and uses the Qualcomm^® AI Hub detection model to produce a preview.
Multistream	Shows AI inference (object detection) on input streams from a camera or a file.
ObjectDetection	Detects objects in camera streams.
Parallel-AI-Fusion	Detects and classifies objects, detects poses, and segments images from a camera input stream.

Prerequisites

Qualcomm Linux multimedia image: The device must be flashed with the prebuilt Qualcomm Linux multimedia image (qcom-multimedia-proprietary-image), which includes Qdemo and the Qualcomm IM SDK.
HDMI monitor: Connect to the device to view Qdemo output.
Mouse and keyboard: Required to interact with the Weston desktop and the Qdemo application.
Wi-Fi connection: Required for AI sample applications to download models and labels from GitHub. Not required for multimedia applications.
USB camera (optional): Required for camera-based sample applications. If connected, select it from the Source list in Qdemo. To use a camera, enable camx on the device by running the following commands on the target device:
echo -n "camx" > /var/data efivar -n 882f8c2b-9646-435f-8de5-f208ff80c1bd-VendorDtbOverlays -w -f /var/data efivar -n 882f8c2b-9646-435f-8de5-f208ff80c1bd-VendorDtbOverlays -p sync reboot
Known issue: The camera basic use case on IQ-8275 isn’t working due to a known issue. To work around this issue, run the following command before running the camera use case:
cp /usr/share/qcom/sa8775p/Qualcomm/SA8775P-RIDE/dsp/cdsp/libbitml_nsp_73nb_skel.so /usr/share/qcom/qcs8300/Qualcomm/IQ8275-EVK/dsp/cdsp/.

Run sample applications using Qdemo

To run sample applications using Qdemo, do the following:

Connect peripherals to the device

Connect the mouse, keyboard, camera, monitor, and power cable to the device.The following figure shows the display ports, USB ports, Ethernet port, power supply port and power on-off switch. Connect the peripheral devices to these ports, including a USB or MIPI camera. For display, connect one end of the Mini DisplayPort cable to DisplayPort0 on the Dragonwing IQ-8275 device, and the other end to your monitor.

To connect the EVK to a display through HDMI, use an HDMI cable and adapter, then connect it to an active DisplayPort on the EVK. The HDMI cable and adapter aren’t included with the EVK.

Power on the device

Toggle the power switch to the On position.After the device powers on, the following screen appears on the monitor.

Open the device shell

Open the device shell by selecting the weston-terminal icon.The following figure shows the weston-terminal icon on the screen.

su -p

When prompted for a password, enter oelinux123.

Launch the Qdemo application

Launch the Qdemo application by running the following command in the weston-terminal:

gst-gui-launcher-app.py

The Experience Application Demo window appears.

Run a sample application

Run a sample application from the Experience Application Demo window as follows:

Connect to Wi-Fi

Connect to a Wi-Fi network by selecting Wi-Fi.

A Wi-Fi connection is required to run AI sample applications only. If you want to run a multimedia application, skip this step.

The following figure shows a sample of the Experience Application Demo window:

Experience Application Demo window with Wi-Fi option

Select the camera source

In the Source dropdown list, select the required camera.The Dragonwing IQ-8275 device doesn’t have a built-in camera, and not all applications require a camera. If you’ve connected an external camera to the device, select it from the Source dropdown list. By default, the On-Device-Camera option is selected.

Select and start an application

In the Applications dropdown list, select an application and select Start.The selected application starts running, and a pop-up window displays the output on the screen.When you run a sample application for the first time, it may take a minute or more to run as the device downloads the AI models and labels from GitHub.The following figure shows the sample output of the Object Detection application, identifying two objects including a person and a dog.

Sample output of the Object Detection application

Stop the application

Stop the sample application by closing the output window.

Close Qdemo

Close the Qdemo application by selecting Exit.

​Prerequisites

​Run sample applications using Qdemo

Prerequisites

Run sample applications using Qdemo