USB camera dwSensorCamera_readFrame always returns timeout

Autonomous Vehicles DRIVE AGX Xavier DRIVE AGX Xavier General
1

Hello,
I am trying to use SAL to read frames from a USB camera on my Ubuntu
Other programs are able to present the camera video feed but I am not able to do it using driveworks.

Opening and starting the sensor works and even the light indicating camera usage is lit up.
But every time I’m trying to read a new frame I recieve timeout.
Any idea what can cause this?

If it matters I tried doing this using my laptop’s built-in camera and an external USB camear Logitech c920 with the same result.

Software Version: DRIVE Software 10
Host Machine Version: Ubuntu 18.04

3

Dear @biber.barak,
Please confirm if the platform is DRIVE PX2 or DRIVE AGX platform?
Could you please share repro code?

4

The platform is DRIVE AGX
But the problem occurs when running on my laptop’s Ubuntu not the drive.
It is the code of sample_camera_usb (just added some prints) but it is pretty much

dwSensorParams params{};
params.protocol = "camera.usb";
params.parameters = "device=0";

CHECK_DW_ERROR(dwSAL_createSensor(&m_camera, params, m_sal));
CHECK_DW_ERROR(dwSensor_start(m_camera));
const dwStatus result = dwSensorCamera_readFrame(&m_frame, 0, 50000, m_camera);
if (DW_TIME_OUT == result) {
    printf("timeout\n");
    return;
}
5

Dear @biber.barak,
So as I understand, you are using the same(just few prints added) sample_camera_usb sample.
Did you increase the timeout parameter and see if it helps?

6

Yes, added another 0 and got the same result

7

Dear @biber.barak,
But the problem occurs when running on my laptop’s Ubuntu not the drive.

So, the sample is working fine on DRIVE AGX and failed to run on host?

9

Haven’t used a usb camera on the DRIVE AGX only a gmsl so I don’t know.
But I wish to have a camera feed on the host to test it as part of a bigger program but for this I need the capture to work on the host.

10

Dear @biber.barak,
Could you check with timeout value >=1000000

11

Tried with 1000000 and 10000000 but I still get DW_TIME_OUT.

12

Dear @biber.barak,
Currently we don’t have this camera to reproduce. Could you share complete logs on DRIVE AGX and Host for sample_camera_usb sample