Live Production Software Forums

Welcome Guest! To enable all features please Login or Register.



Go to last post Go to first unread
#1 Posted : Tuesday, November 21, 2017 3:23:05 PM(UTC)

Rank: Newbie

Groups: Registered
Joined: 11/21/2017(UTC)
Posts: 1
Location: New York City

Hi Good people,

I am new here I just plugged in two LifeCam Studio's into the vMix but only one picture comes up.
Can someone pls help me so I can use to two cameras at the same time and be able to mix my shots.

#2 Posted : Wednesday, November 22, 2017 11:52:47 AM(UTC)

Rank: Advanced Member

Groups: Registered
Joined: 7/1/2015(UTC)
Posts: 1,019
United States
Location: Houston TX

Thanks: 292 times
Was thanked: 234 time(s) in 207 post(s)
I think that the LifeCam Studio needs a specific driver.

If a webcam requires a specific driver then you cannot use two of them on the same system. This is because the driver is designed to support only one attached client device. That's the anticipated use case.

In the case of Logitech webcams it has been possible to tell windows to treat them as generic "UVC" devices. The generic UVC driver is the Windows built-in driver for USB Video Class devices. As the built-in driver it supports multiple instances of itself in use at the same time, each used by a different device.

I've had as many as four Logitech webcams attached to the same system.

Note that the Microsoft LifeCam Studio will usually only deliver 720p30. The camera has a proprietary compression implementation in silicon. When used with the Microsoft driver it's supposed to be capable of delivering 1080p30.

The MS driver gets a compressed stream from the camera, decompressing it to YUY2 in memory on the PC. In theory that means that the client app (vMix, Wirecast, Skype) doesn't need to know anything specific about the USB 2 link or the compression required to deliver 1080p30 over that link.

Rarely does this actually work. I've only seen it work with Skype myself. The MS driver has a huge memory footprint and uses a lot of CPU since it's transcoding the stream.

Probably more than you wanted to know.

Users browsing this topic
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.