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If you are providing a driver for a webcam or a digital camcorder, consider using the system-supplied universal serial bus (USB) Video Class driver, Usbvideo.sys. The USB Video Class (UVC) driver is a Microsoft-provided AVStream minidriver that provides driver support for USB Video Class devices. When your device uses UVC, you do not need to supply your own driver. Instead, the device works automatically with the system-supplied driver.

Follow this procedure to download and install the latest USB driver for digital still cameras, camcorders, digital video cassette recorder and Memory Stick® readers. IMPORTANT: Do not connect the camera to the computer when installing this driver. The camera should only be connected to the computer after the driver installation has been completed. If drivers were not downloaded automatically by Windows Update, use Device Manager to refresh the driver from Windows Update, or contact the device manufacturer. I’m Moli, your virtual agent. I can help with Moto phone issues.

In the USB Video Class model, vendors do not write drivers; instead, vendors implement video streaming hardware according to the guidelines in the Universal Serial Bus Device Class Definition for Video Devices Specification document located on the USB Implementers Forum website. The UVC driver queries the hardware directly to obtain its capabilities and then drives the device, with no proprietary driver required.

You can optionally extend UVC driver functionality to add vendor-specific processing.

The following table shows support for UVC in different versions of Windows:

Beginning with Windows 8, the H.264 video codec (encoder/decoder) is supported. H.264 is an open standard that allows efficient video compression techniques for reducing the use of network bandwidth and storage space. This leads to a higher video quality for a given bit rate. For more information, see USB H.264 Video Cameras Support. Also refer to Microsoft Proposed Extensions to the USB Video Class for H.264.

The following list shows some advantages to using the Usbvideo.sys driver:

• No CD required for installation

• No driver writing cost

• No maintenance cost

• Opportunity for vendors to add functionality

• Easier debugging with public symbols

• Works with Driver Verifier

• Works with checked OS builds

• Compliant with ACPI power management

• Compliant with Selective Suspend power management

• Supports multimedia APIs in Media Foundation and DirectShow

The system-supplied Usbvideo.sys driver supports the following UVC features in different versions of Windows:

Customizing the UVC Driver

You can customize your support for UVC by supplying an Extension Unit plug-in. Extension units provide a private control channel between device and vendor-supplied application.

Additional Resources

To test your UVC implementation, you can use the following tools:

• GraphEdit

• KsStudio

• USBView

For more information about these tools, see AVStream Testing and Debugging.

You can find specifications for USB Video Class 1.1 on the USB Implementers Forum website.

This article helps to fix an issue in which Windows 10 doesn't install specific drivers for USB audio devices on the first connection.

Original product version: Windows 10, version 1703
Original KB number: 4021854

Symptom

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When you connect a USB audio device to a Windows 10 Version 1703-based computer the first time, the operating system detects the device but loads the standard USB audio 2.0 driver (usbaudio2.sys) instead of the specific device driver.

Cause

This issue occurs because the USB audio 2.0 driver (usbaudio2.sys) isn't classified as a generic driver in Windows 10 Version 1703. Therefore, the system assumes that a compatible, nongeneric driver is installed for the device even though the driver is generic.

This issue also causes Windows 10 Version 1703 to postpone the search for other compatible drivers through Windows Update that typically occurs immediately after you install a new device.

Resolution

To fix this issue, use one of the following methods.

Method 1

To resolve this issue, install update 4022716.

Method 2

If the device-specific driver is distributed through Windows Update, you can manually update the driver by using Device Manager. For more information about how to do this, see update drivers in Windows 10.

Method 3

If the device is not yet connected, first install the device-specific driver, such as by using the appropriate installer. After the device-specific driver is installed, Windows 10 will select that driver instead of the standard USB audio 2.0 driver when you first connect the device.

Note

See the device manufacturer's user guide for specific instructions about how to install the driver.

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Method 4

If the driver isn't distributed through Windows Update, you can manually reinstall the driver. To do this, follow these steps:

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1. Install the device-specific driver (see Method 2).
2. Open Device Manager.
3. Right-click (or tap and hold) the name of the device, and then select Uninstall.
4. Restart the computer.

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When it restarts, Windows will try to reinstall the device by using the device-specific driver.