voxl-streamer client repetitive connect/disconnect

Eric Katzfey

@wilkinsaf Just try one at a time for now. And when you plug the camera in do you see a new /dev/videoX entry appear?

Eric Katzfey

@wilkinsaf Also, were you able to get the ordering information for these cameras? If they aren't too expensive I would like to order at least one of them to test against.

wilkinsaf

@Eric-Katzfey

Yes, let me try one at a time now.
Here are the two cameras

![0_1640728100493_PXL_20211228_214717072.jpg](Uploading 100%)

wilkinsaf

@Eric-Katzfey

Good news, I was able to get voxl-uvc-server to spin up with one usb camera connected.

However, I am getting this issue from voxl-streamer

Seems like I need to figure out the frame size and set the correct one. Let me play around with that now

wilkinsaf

@Eric-Katzfey Doesn't look to be frame size as the "sizes" seem non-deterministic

Eric Katzfey

@wilkinsaf Great, that's some progress! What about if you try the other camera? Not sure why the frame length is different. For a given resolution and frame format that number should be a constant. (e.g. 640 x 480 x 2).

wilkinsaf

@Eric-Katzfey

Good suggestion. Let me try that.
Check out the length when uvc server fires up

Got frame callback! frame_format = 3, width = 640, height = 480, length = 613376, ptr = 0

interesting

Eric Katzfey

@wilkinsaf You can try modifying this line in voxl-uvc-server: https://gitlab.com/voxl-public/modal-pipe-architecture/voxl-uvc-server/-/blob/dev/src/main.c#L83

Make it read: .size_bytes = 614400, \

Then rebuild it and try again.

wilkinsaf

@Eric-Katzfey Sounds good.

The other camera is giving me this error

The one I compiled could not find the device at all

Eric Katzfey

@wilkinsaf Perhaps you are working on master branch? The latest and greatest (The one you should be using) is the dev branch.

Eric Katzfey

@wilkinsaf Thanks! I'm going to order them so that I can have them as part of our normal USB UVC camera test suite.

wilkinsaf

@Eric-Katzfey Thanks Eric!

I switched to dev branch (slightly embarrassing as you told me to switch to dev) and pull

voxl:~/voxl-uvc-server(dev)$ git pull origin dev
From https://gitlab.com/voxl-public/modal-pipe-architecture/voxl-uvc-server
 * branch            dev        -> FETCH_HEAD
Already up-to-date.

I made sure to install the correct libuvc ipk

voxl:~$ opkg install libuvc_1.0.2_202112182223.ipk
Collected errors:
* opkg_prepare_file_for_install: Refusing to load file 'libuvc_1.0.2_202112182223.ipk' as it matches the installed version of libuvc (1.0.2).

I then built the voxl-uvc-server, ran Makefile, and tried to run

Eric Katzfey

@wilkinsaf Okay, interesting. Let's go back to the original camera with the incorrect size. Can you add the patch I suggested and see if you can make that camera work?

wilkinsaf

@Eric-Katzfey ope, almost forgot. Yes, let me do that now

wilkinsaf

@Eric-Katzfey

For some reason now it is still struggling to find any device. I tried both cameras

wilkinsaf

@Eric-Katzfey

I know that it is there as ffmpeg picks up on it

Eric Katzfey

@wilkinsaf Unfortunately, it's hard to debug this without actually having the camera in my test setup. I've never seen a camera stop being detected like that. I did order the cameras but won't have them in my possession until the 9th of January.

wilkinsaf

@Eric-Katzfey My apologies. I thought I sent a response to this.

Totally get it. Debugging over a message board is really hard. I believe my associate is getting some of the cameras to your offices sooner than the 9th.

I have been continuing to try different things on our end.

Eric Katzfey

@wilkinsaf I have both of the cameras now. I have updated libuvc to version 1.0.3 (http://voxl-packages.modalai.com/dev/) and voxl-uvc-server to version 0.0.6 (http://voxl-packages.modalai.com/dev/). The voxl-uvc-server update isn't really necessary but I cleaned up a little bit of the debug logic. There was a check that was failing in libuvc for the Blue Robotics camera (USB 32e4:9422, "H264 USB Camera") so I removed that check and then it started working. So far it has been reliable. The other camera (USB 337b:090c, "HBVCAM 5M-AF") was coming up without these changes. However, it isn't reliable. Sometimes uvc_open will fail, other times it will pass. If it passes then sometimes it will successfully start streaming and other times it will think it was successful but gets no frames. Not sure why it is having these issues so need to debug more.

wilkinsaf

@Eric-Katzfey Awesome!

Thank you Eric. Will try that out and report back