Rank: Newbie
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Joined: 10/24/2017(UTC)
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Location: United States
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I'm running the program with USB 2.0 with a multi port for three cameras.
Sound is running into the computer from microphones to a mixing board.
I can only get one camera streaming on facebook and the audio. 2 inputs.
Any way I can get three cameras and audio going?
Brand new and frustrated I thought I would be able to do this more easilly.
Thanks,
Joe
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Rank: Advanced Member
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Joined: 5/13/2014(UTC) Posts: 518   Location: Manchester, UK Thanks: 2 times
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There's really not much bandwidth available over USB 2.0 when it comes to ingesting raw video from multiple cameras, unless you're working at very low resolution. You don't say much about the spec of the computer, or what the cameras are, but a look at the recommended system specs for vMix will give you an idea of what's needed ideally.
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Rank: Advanced Member
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Joined: 10/29/2013(UTC)
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We are missing a lot of information such as the system specs and the resolution your trying to stream. However, the fact that you are seeing one camera is good. The typical USB channel will not power a great deal, and it sounds like your channel will not support 2 cameras at the current resolution. If by multiport, you are meaning a USB hub, this could also be an issue. Try attaching two of your cameras to two rear USB inputs and one to a front input. This will spread out the demand over both USB channels. If two cameras work (one from the rear and one from the front), then try lowering the resolution to see if all three can become operational. If this allows all three to be active, then consider adding a PCI USB card to add a third channel.
Hope this helps
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Rank: Advanced Member
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Joined: 7/1/2015(UTC) Posts: 1,151  Location: Houston TX Thanks: 319 times
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You don't say what cameras you are using. It's critical that they support MJPEG encoding of the video stream.
If they DON'T you can only ever have ONE camera on the USB 2.0 bus. And that camera will be limited to 720p30.
If they DO support MJPEG you can probably get away with TWO cameras at 720p30 on a single USB 2.0 bus.
Beyond that you need to use multiple USB buses, so you can distribute the load presented by the cameras. This is much easier on desktops than a laptop, where only on USB bus may be available.
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Joined: 11/2/2017(UTC) Posts: 14 Location: Portland, OR Thanks: 1 times
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