USB camera live streaming through Microhard carrier board

[Jetson Nano]

@Eric-Katzfey
sure I can summarize,

Camera 1 - Lepton,
QGC - Did not test
VLC - Did not stream, error message.
ffplay - stream worked

Camera 2 - logitech c270 camera
QGC - Did not test
VLC - Did not stream, error message.
ffplay - stream worked

I did not understand what you meant by mipi camera, if it is normal hires camera connected to the yellow board, it is streaming fine, slightly slow through the microhard connection, but I can see the video stream on the portal.

the following message showed up when i tried to trigged the rtsp stream through vlc

A new client rtsp://192.168.168.150:58656(null) has connected, total clients: 2
rtsp client disconnected, total clients: 1
rtsp client disconnected, total clients: 0
no more rtsp clients, closing source pipe intentionally
A new client rtsp://192.168.168.150:45852(null) has connected, total clients: 1
Camera server Connected
gbm_create_device(156): Info: backend name is: msm_drm
gbm_create_device(156): Info: backend name is: msm_drm

[Eric Katzfey]

MIPI is the physical connection to the VOXL2 board. So, yes, the "normal hires camera" is connected via mipi instead of USB. I'm trying to help you debug this. Normally, when something doesn't work, you try to narrow down the issue by trying some carefully thought out variations to see what works and what doesn't. That can determine the part that is not working. For example, if you have USB camera -> voxl-uvc-server -> voxl-streamer -> Microhard -> VLC and that is showing problems and then you switch to a stream with MIPI camera -> voxl-camera-server -> voxl-streamer -> Microhard -> VLC and that doesn't have problems then it's logical to focus on the USB camera -> voxl-uvc-server part of the pipeline as the problematic part. In your first post you mention QGC stream works and then in your last reply you said you did not test with QGC so that is confusing. And I'm not sure what your end goal is. In the first post you say "Please help to stream live video from the lepton camera through the microhard board." Then you say that it is working from ffplay. So, is that okay now? Or is ffplay not an acceptable solution for you?

[Jetson Nano]

@Eric-Katzfey ,
Please excuse me for the confusion caused by me.

Goal -
my goal is to achieve continuous video stream from lepton camera connected through USB cable. the USB port I am using is Microhard.

Issues I faced -

1. During my initial testing, I was able to stream the lepton video through VLC, but the camera stream kept on getting interrupted (the camera stream ended), once I restart the uvc-service and the stream-service , it starts again. This observation was in loop.
   I wanted your help to solve this issue.
2. Once you asked for the log file, I tried to replicate this test, but the stream was not working through VLC.
   I attached the log file.
3. To verify the camera is working fine I tried with ffplay, the stream was working fine.
4. I verified the MIPI camera, I was able to see the video on the voxl-portal, but while using the stream-service, it was not working on VLC.

Now, I would like your help to solve the following problems

1. Get the video stream on VLC
2. Get the video stream to work continuously with out any interruption.
3. Also it would be great if you clear one more query of mine, whether I can setup the USB port with any camera(which supports USB protocol), If I make necessary changes to the codes or UVC-service and Stream-service.
   Thank you for your patience and looking forward to response.

[Eric Katzfey]

That's kind of pointing to VLC as the issue. Can you try with QGC?

[Jetson Nano]

@Eric-Katzfey
Hi, Sorry for the late reply.
I tested the rtsp with QGC. The stream was working fine, until suddenly the stream got stuck and I had to restart the voxl-stream command.

• I have one major question, does usb camera support continuous live video stream.
• I am planning to purchase the voxl2 mini and use the usb port for lepton, I just want to be sure that the port can support continuous rtsp stream without having any issues.
• Is there any setup, I should be knowing for seamless streaming other than what is mentioned in the docs.

thank you for time, looking forward to your response.

[Eric Katzfey]

Yes, we have tested a few USB (UVC) cameras and they can continuously live stream. So we need to figure out what is causing the problem on your setup.

[Zachary Lowell 0]

@jetson-nano I am testing this right now and am not seeing an issue - can you describe the following:

1. How long is the voxl on when you see this issue/how long has the stream been going?
2. Have you confirmed that voxl uvc camera library did not die and that is the cause?
3. Have you confirmed via the voxl streamer logs that the service did not die?

I am trying to understand which library is the source of the error in the mpa.

Thanks!

[Jetson Nano]

@eric-katzfey @Zachary-Lowell-0
Thank you guys for the response.

1. The voxl 2 was on max 8 minutes. The video streamed for 2 minutes, then the frame froze on QGC. I had to restart the voxl-stream command to restart the rtsp on QGC.
2. There was no error message on the debug window, the frames were passed constantly, during the RTSP freeze also.
3. The voxl-Stream only through error once I tried to connect to the VLC. While connecting to QGC,and while the video freeze there was no error message.

Thanks!

[Zachary Lowell 0]

https://www.loom.com/share/41699fad8b6842a6bf25c986c98c1c3b

Had it running on 8 minutes via voxl-uvc-server.

Can you confirm that you had good bandwidth the entire time? This is also over a microhard hat (although I have a wifi stick plugged into the usb port on here alongside the usb camera)

This sounds more like a networking issue than anything hardware or software related.

[Jetson Nano]

@Zachary-Lowell-0
Thank you for testing it out and for fast response. I am also feeling it is a network issue.
I will also try to replicate the same test condition as yours, also will verify the bandwidth.
Thanks!