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Questions tagged [uvc]

UVC is a short for USB Video device Class (also USB video class) and it is a USB device class that describes devices capable of streaming video like webcams, digital camcorders, transcoders, analog video converters and still-image cameras.

UVC is a short for USB Video device Class (also USB video class) and it is a USB device class that describes devices capable of streaming video like webcams, digital camcorders, transcoders, analog video converters and still-image cameras.

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Having trouble runing uvc camera on ROS kinetic

I want to run a uvc_camera on ROS kinetic, but having trouble with error "uvc_start_streaming: Invalid mode (-51)" my camera parameter: ioctl: VIDIOC_ENUM_FMT Index : 0 Type : Video Capture Pixel Format: 'YUYV' Name : YUYV 4:2:2 …
flaver
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When using the media foundation Source Reader with a UVC camera, on occasion OnReadSample will never get called

I'll start off by saying that this question is very similar to this other one - the main difference will be, I hope, I will provide enough context to be able to resolve the issue :) I am writing a C++ library for a proprietary UVC camera device that…
ColgateToothpaste
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Could not successfully request usb permission（UVCCamera）

I am working on a uvc camera function, and can normally request permissions and use them under android10.0 system, but in android10.0 system, I directly receive permission request failure, and there is no pop-up permission request prompt popup…
tangtang
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How to use the "H.264 UVC 1.5 camera encoders" in Windows Media Foundation

I am trying to write some code on Windows based on Windows Media Foundation to work with some USB UVC1.5 cameras, which can provide the H.264 stream. Now I can dump the H.264 stream from the cameras via IMFSourceReader interface. But I don't know…
Jerry Zhang
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What USB descriptor fields are required for DirectShow to recognize a UVC camera?

I am debugging UVC firmware on a custom USB web camera. The camera enumerates and I am able to stream video on Ubuntu using guvcview. However in Windows 10, the device enumerates and is shown as a Camera in device manager, but is not recognized by…
Andrew H
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How to limit FPS for UVC gadget?

I'm developing an application based on g_webcam kind of template code available at git://git.ideasonboard.org/uvc-gadget.git. I've noticed the FPS setting supplied in the USB device config structures is not respected. In fact, gadget attempts the…
Dmitry Mikushin
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UVCCamera does not work on specific device

I am trying to connect a USB Camera with an OTG cable on my Android app and for this purpose I use the UVCCamera repo. All the samples and my app work fine on most devices I have tested, but not on a Motorola E4 (on which I specifically need to run…
Giorgos Paraskevopoulos
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webcam + external camera failure, cannot access /dev/video*: No such file or directory

I hope someone out there can help me! I'm working on a Toshiba SATELLITE-L50-A-1DN, and I am having problems connecting a camera to the USB ports, as well as the integrated webcam not being recognised. I am using Ubuntu 16.04 with kernel…
Richard Owen
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create uvc device and test an application

I'm working with a board which has Linux installed. Eventually it will be used as a USB webcam. I built the kernel and added a UVC driver to it. I'm following these instructions to test it. Unfortunately when I connect my host and run the…
flashburn
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how to create mjpeg

I can't understand how to create a .mjpeg file. As far as I understand it is simply a series of jpeg files. I searched online for a way to combine them into a single file, but didn't find any information. Some people said that one just needs to…
flashburn
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running and testing a UVC gadget

I'm trying to test a UVC I compiled for a Xilinx board. I'm following these directions. On line 720 it says device: run the gadget. What is meant by run the gadget Is it modprobe g_webcam? Any help is appreciated.
flashburn
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How to get camera intrinsics through media foundation

I'm trying to access the camera intrinsics parameters using media foundation \ directshow API's, like focal length, principal point and distortion coefficients. I saw that focal length can be queried via ICameraControl, but for all the other…
Eldar
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USB : gadget : device mode : configfs: uvc and mass storage on single configuration?

I'm trying to add uvc and mass storage in device mode for single usb device controller port. I'm using configfs to do job. Can anybody tell how to do it. Regards, GBiradar
GBiradar
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Merging multiple camera streams on Android using libuvc

I can connect two USB connected cams and view them side by side on screen (thanks to this example. However I want to go a step further - taking two frames from both the videos and stitch them and display. I have independently done the stitching as…
iuq
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Endoscope app USB DEVICE DETACHED when open LED light?

I've developed an Android App Supports Endoscope using library UVCCamera. Everything working properly but when using the camera with LED Light, a moment later the camera will disconnect and show the message "USB DEVICE DETACHED". This error also…
Kwang KFAH
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