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欢迎访问Roland ProAV中文网站 - 支持 - - VR-4HD: Troubleshooting USB Video and Audio Output

VR-4HD: Troubleshooting USB Video and Audio Output

The VR-4HD's USB Audio/Video output is a plug-and-play solution for live streaming and video recording. It converts your VR-4HD into "one big webcam" that you can use with compatible software.

But some computer and USB cable combinations may not capture the VR-4HD's video signal and only capture the audio. This guide will walk you through troubleshooting the following:

  • No video or audio via USB
  • Only audio via USB
  • Video freezes indefinitely via USB


If you have an issue where the video briefly freezes and resumes, that may be an issue with your streaming settings or upload bandwidth. Run a speed test to see if your upload speed is fast enough. If your video stream's bit-rate is 4 Mbps, for example, your upload speed should average 10 Mbps or higher. More information in this guide.


If you recently updated to OBS version 26.0.0, you may need to delete your Sources and add them again to see the VR-4HD's video signal correctly. More info on adding sources is in this guide.


Before we begin troubleshooting, here is a connection sequence to try if you are having issues:

  • Disconnect USB 3.0 cable from computer
    • OK to leave connected to VR mixer
  • Turn on the computer
    • Or wake from sleep mode, but restart if having issues
  • Turn on the VR series mixer
  • With both devices full loaded, connect USB 3.0 cable directly to computer
  • Wait a few seconds, and open configured streaming/recording software
  • Confirm you selected and see the switcher's selected video input


Here are some potential causes of USB Video Failure, which are covered in detail in the sections below:

  • USB Cable
    • Not Fast Enough
    • Too Long
    • Not Shielded
  • Computer
    • Port Issue
    • USB-C Hub Issue
    • USB Video Bandwidth Issue
    • Settings Issue
    • 3rd Party Device Issue




Before you begin troubleshooting, go to SYSTEM SETUP > SYSTEM > VERSION, and confirm it is 2.000.

If not, update the firmware to the latest version:


It is strongly recommended to also perform a Factory Reset after updating, as this may resolve the issue before any troubleshooting:



Troubleshooting Video




If you have any issues with the USB video signal, it's possible you need to try a different cable and/or USB-C adapter.

The USB cable should meet these criteria:

  • USB 3.0 Super Speed
  • Between 3 to 15 feet long
  • Type A to Type B male connectors
    • If you need to convert to USB-C on a Mac, use this adapter
    • Type C to Type B will also work, but have not been tested


  • USB 3 Type B connectors have a different appearance than USB 2, and take up the space of the entire port on the VR-4HD.


  • Here is an example of a USB 2 cable in a USB 3 port. Notice how the top portion of the port is still visible:



Based on our testing, here are some recommended USB cables for your VR-4HD:



  • Belkin
    • F3U159B Series Recommended
  • Amazon Basics
    • Look for: "USB 3.0 Cable - A-Male to B-Male Adapter Cord"
  • Star Tech
    • USB3SAB Series Recommended



  • Cable Matters
    • 200007 Series Not Recommended
  • Hosa
    • USB3xxAB Series Not Recommended
      • xx is the length in feet: 03, 06, 10
    • "USB 3.0 Cable A Male to B Male"
  • Pearstone
    • USB3-AB Series Not Recommended
  • Tripp Lite
    • U322, U328 Series Not Recommended




  • Make sure the OUTPUT FADE button is off, if it is on (lit red), Fade to Black is enabled.






    If HDCP is on, it disables the USB output. It also disables the analog output.

    The VR-4HD supports many video source devices, but DVD/Blu-Ray players require HDCP to be turned on in the system settings. Once enabled, the signal will pass through.

    If the VR-4HD's HDMI output is connected to a recording or streaming device, even with HDCP enabled, that device will block the DVD/Blu-Ray player's HDCP copy-protected signal passing through the switcher.




  • Disconnect the USB cable for a few seconds from the computer, and then reconnect it.

  • This physically resets the connection.




  • Try bypassing any USB hubs or extenders.
    • Some powered USB hubs may work, but passive hubs are not recommended.
  • If your computer only has USB-C ports, try a single-port USB Type A to Type C adapter.
    • If using a Mac, try this adapter, do not use ones with multiple ports.




  • Try a different USB port on the computer.
    • Note: Some older computers may have a mix of USB 2 and USB 3 ports.




  • Try disconnecting other USB devices to check for conflicts.
    • Remember to safely remove any external hard drives.




  • Try the following:

    • Shut down your computer and VR-4HD.

    • Unplug all USB devices.
      • Note: Most computers can only support a single USB video device. Disconnect any USB cameras before reconnecting the VR-4HD.

    • Turn on your computer and VR-4HD, and allow both to fully load.
    • Connect the VR-4HD directly to a USB port.
      • Note: Bypass any hubs or extenders.
      • Note: USB-C adapters are ok to use, as long as they are not hubs.

    • Open your streaming/recording software/website.




  • If using an older computer, check if the port is labeled "SS", or Super Speed.
    • Note: Many ports today are Super Speed, but not labeled
    • Note: Many (but not all) Super Speed cables and ports have blue plastic in the connectors




  • Press the [ USB SETUP ] button the VR-4HD panel.



  • On the LCD screen, you will see this menu:



  • You can either tap the setting you want to adjust, or rotate the [ VALUE ] knob to select the following menu options, and push [ ENTER ] on the knob to adjust them.

  • Under STATUS, it should read USB 3.0.
    • If your USB STATUS is USB 3.0 and you experience the USB signal freezing, try changing the USB FORMAT, more on that below.
  • If the Connection status is USB 2.0 or NC, press the [ RESET ] button on the LCD screen, and see if it changes to USB 3.0.
    • If that does not resolve the status issue, there is an issue with your USB 3.0 cable, or the computer's USB port itself, as it is not fast enough for video.

  • The Dropped Frames counter will increase if the USB connection is not fast enough.


How to Change the USB FORMAT:

  • On the VR-4HD, the USB FORMAT is tied to the SYSTEM FORMAT setting.
    • There are two possible USB video output formats on the VR-4HD: 720p 29.97, and 1080p 29.97.
  • Press the [ SYSTEM SETUP ] button on the control panel, followed by selecting [ SYSTEM ] on the LCD screen (page 3/3 along the bottom).

  • On the LCD screen, you will see this menu:


  • Changing the SYSTEM FORMAT will change the resolution of all video outputs.

  • The second option, FRAME RATE, should be 59.94, unless you are running a 50 Hz video system.
    • 50 Hz operation has different frame rates for the output settings.
  • If your USB STATUS is USB 2.0 or USB 3.0 and you experience the USB signal freezing, try changing the SYSTEM FORMAT to 720P and test again.


  • Because the System Format setting affects inputs 1-3 and all outputs, including USB, you can also adjust the output settings so the HDMI output is a different resolution than the PVW and USB outputs.

    • Press [ SYSTEM SETUP ] button on the control panel, followed by selecting [ VIDEO OUT ] on the LCD screen, and change the OUTPUT RESOLUTION from AUTO to a specific resolution.

    • Note that if you set the System Format to 720P and you setup the HDMI to output 1080P, it will upscale the output.

    • For more information on how the HDMI inputs are affected by the System Format setting, please see this article: VR-4HD: Troubleshooting Only HDMI Input 4 Working.




  •  If you experience video that stutters or fails, and your computer meets the system requirements, first check if any other camera, capture, conferencing, streaming, or recording programs are open. These may cause conflicts that cause your signal to drop out.
    • For example, do not run FaceTime and VR Capture at the same time. It may work initially, but performance could be unpredictable.
  • In addition to restarting your computer as suggested earlier, closing any programs you do not need is recommended, even programs like your web browser can consume a lot of resources and impact performance on older machines. Also check your system tray in Windows to see if any programs are running there as well.




  • It's possible there is an issue with your computer's settings or drivers.
    • Note: The VR-1HD automatically installs drivers, you do not separately download and manually install the drivers
  • Trying a different computer may help, at least for cross-testing to narrow down the problem area.




  • Windows 10
    • Get the latest Windows Updates
    • Update the drivers for your Display Adapter and USB Drivers
      • Your PC's manufacturer may also have an update tool you can download and install
      • Only manually download driver updates from the manufacturer's website
      • Several customers reported that updating the USB Drivers for the USB Host Controller and Root Hub resolved their issue


  • MacOS
    • Update your Mac to the latest version for your hardware, if possible
    • There are no individual driver updates for the Mac hardware itself

Note: Windows 7 is not recommended, Microsoft stopped supporting it as of January, 2020.




Additional Troubleshooting



  • If you experience record issues using our free VR Capture software, please try recording to your system drive, and not an external drive

  • If you record to external media, like a USB flash drive, format the drive between recordings 
    • Also make sure the drive is fast enough for HD video recording, and connected to a Super Speed USB 3.0 port as well.




Troubleshooting Audio



  • Make sure the [TO PC] knob is set to the 2 o'clock "dot" position on the VR-4HD panel. This knob is a separate audio control for your USB output, and sets it as 0.0 dB, the same level as your main mix.






  • Streaming services and recording software that support USB sources basically treat your VR-4HD as a webcam, and you will need to select the VR-4HD Video and Audio separately.

  • For example, in our free VR Capture recording software, choose the VR-4HD as your Video Input, followed by the VR-4HD(Audio) as your Audio Input.
    • Note: Roland Live Recorder and Roland Live Streamer for Windows 10 will automatically detect your VR-1HD, VR-4HD, VR-50HD MK II, and UVC-01 as both a video and audio source.




  • Next, input audio into your switcher, and you should see the audio meters moving in your software or web interface.



  • If you are using a Mac and do not see the Audio Input menu in VR Capture, downsize the software window until it appears.






More Information


For more information about the USB output, refer to the VR-4HD Reference Manual.

Note that this is a separate document from the Startup Guide, or the RCS Owner's Manual.


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