uvc_get_stream_ctrl_format_size failed

Kris

@tom
Ok, thank you. I will try that first.

Kris

@tom
I've updated my platform to 0.9 and I am still unable to successfully open the uvc camera.

voxl:~$ lsusb
Bus 001 Device 008: ID 2560:c184  
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

voxl:~$ voxl-uvc-server -p c184
uvc_open failed
voxl:~$ voxl-uvc-server -v 2560
uvc_open failed
voxl:~$ voxl-uvc-server -d     
Enabling debug messages
voxl-uvc-server starting
Image resolution 640x480, 30 fps chosen
UVC initialized
Device found
uvc_open failed
UVC exited
voxl-uvc-server ending

tom

@Kris Are you sure that your UVC camera is 640x480 resolution?

Kris

@tom
Yes, in the debug messages, it says that it is 640x480.
Is there another way to check the resolution?

tom

@Kris Yeah that's just the default that voxl-uvc-server uses if not explicitly specified otherwise with the -r flag.

You can use show-video-device-info.sh and that may provide some clues.

What is the part number or make and model of the UVC camera you're using? It's possible it's supported image formats don't match up with those supported by voxl-uvc-server

Kris

@tom Ok, Thank you I will try that now.
Here are some details of my UVC 2.0 camera.

Kris

@tom
This is all the information I get from show-video-device-info.sh

voxl:~$ show-video-device-info.sh
/dev/video2: e-CAM83_USB 2560:c184
/dev/video3: e-CAM83_USB 2560:c184

Kris

Is there any chance I can get 1920 x 1080 @30 fps using h264 in the voxl-uvc-server?
Or is 640 x 480 the only option in the voxl-uvc-server?

Kris

The rest of the information about my current uvc camera is here.

Kris

Additional information;

Kris

@tom
I gave this a try, but no luck.

voxl:~$ voxl-uvc-server -d -r 1920x1080 -f 30
Enabling debug messages
voxl-uvc-server starting
Image resolution 1920x1080, 30 fps chosen
UVC initialized
Device found
uvc_open failed
UVC exited
voxl-uvc-server ending

Kris

@tom

voxl:~$ show-video-device-info.sh
/dev/video2: e-CAM83_USB 2560:c184
/dev/video3: e-CAM83_USB 2560:c184

/dev/video2: is h264
/dev/video3: is MJPG & YUY2

Kris

voxl:~$ voxl-uvc-server -l
*** START DEVICE LIST ***

Found device 0

Got device descriptor for 2560:c184 (null)

Found device 2560:c184

uvc_open failed, Return code: I/O error (-1)

Found device 0

Got device descriptor for 2560:c184 (null)

Found device 2560:c184

uvc_open failed, Return code: No such device (-4)

Found device 0

Got device descriptor for 2560:c184 (null)

uvc_find_device failed, Return code: No such device (-4)

Got device descriptor for 2560:c184 (null)

Found device 2560:c184

DEVICE CONFIGURATION (2560:c184/00.00.01) ---
Status: idle
VideoControl:
	bcdUVC: 0x0100
VideoStreaming(1):
	bEndpointAddress: 129
	Formats:
	FrameFormat(1)
		  bits per pixel: 16
		  GUID: 4832363400001000800000aa00389b71 (H264)
		  default frame: 1
		  aspect ratio: 0x0
		  interlace flags: 00
		  copy protect: 00
			FrameDescriptor(1)
			  capabilities: 00
			  size: 3840x2160
			  bit rate: 165888000-995328000
			  max frame size: 0
			  default interval: 1/15
			  interval[0]: 1/30
			  interval[1]: 1/15
			FrameDescriptor(2)
			  capabilities: 00
			  size: 1920x1080
			  bit rate: 165888000-995328000
			  max frame size: 0
			  default interval: 1/30
			  interval[0]: 1/30
VideoStreaming(2):
	bEndpointAddress: 136
	Formats:
	UncompressedFormat(1)
		  bits per pixel: 16
		  GUID: 5955593200001000800000aa00389b71 (YUY2)
		  default frame: 1
		  aspect ratio: 0x0
		  interlace flags: 00
		  copy protect: 00
			FrameDescriptor(1)
			  capabilities: 00
			  size: 640x480
			  bit rate: 24576000-147456000
			  max frame size: 614400
			  default interval: 1/15
			  interval[0]: 1/15
	MJPEGFormat(2)
		  bits per pixel: 0
		  GUID: 4d4a5047000000000000000000000000 (MJPG)
		  default frame: 1
		  aspect ratio: 0x0
		  interlace flags: 00
		  copy protect: 00
			FrameDescriptor(1)
			  capabilities: 00
			  size: 1920x1080
			  bit rate: 24576000-147456000
			  max frame size: 614400
			  default interval: 1/30
			  interval[0]: 1/30
END DEVICE CONFIGURATION

*** END DEVICE LIST ***

Kris

@tom
May I ask what image formats the voxl-uvc-serversupports?

Kris

I have a feeling that maybe the problem is deriving from my camera’s GUID Format.
Does the voxl-uvc-server accept GUID: 4832363400001000800000aa00389b71
for h264 format?
How would I go about correcting the guidFormat to match up with the voxl-uvc-server?

tom

@Kris You can see supported format info here: https://gitlab.com/voxl-public/voxl-sdk/services/voxl-uvc-server/-/blob/master/src/main.c#L64

Another thing to try out is using gstreamer instead of voxl-uvc-server + voxl-streamer with a pipeline similar to the following:

gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554

The pipeline may need to be tweaked slightly but it's one I've used before for other UVC cameras that voxl-uvc-server was unhappy with

Kris

@tom
Thank you, I will give this a try.
I am trying to use H.264 on this camera.
This is the second UVC camera that I’ve purchased because I am trying to log the frames from voxl-logger. From what I understand, H.264 output is the format that can do this.
Is there a way to call for only the /dev/video2 to start with the voxl-uvc-server or gstreamer?
Does the voxl-uvc-server accept h264 1920x1080 @30fps?

Kris

@tom
Do I paste this in the voxl terminal?

gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw,format=YUY2 ! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ! rtph264pay name=pay0 ! udpsink host=192.168.1.97 port=8554

Does this have uvc frame or video capture capabilities?

Kris

@tom
Sorry to bother you again, but I am not seeing the h264 format supported in the main.c script you provided for the voxl-uvc-server. Is it possible to edit the voxl-uvc-server main.c script to accept h264 format at 1920x1080 @30fps?

tom

@Kris You can read more about how gstreamer and the gst-launch-1.0 command works here: https://gstreamer.freedesktop.org/documentation/tools/gst-launch.html?gi-language=c

Yes, you would run that command on VOXL2. That specific command pulls frames from /dev/video22 (the UVC camera), it tells it to expect YUY2 formatted frames (you can change this to your liking) and then it converts it to an RTSP video stream. You could modify the pipeline to instead write to a file instead of streaming.

There is a ton of documentation on gstreamer out there that can help you out with tailoring the pipeline.