Tutorial: Configuring Blackmagic Intensity Pro for a Live-Switched Wirecast Webcast

当你捕捉现场事件时, shooting with two or more cameras dramatically expands your ability to cover all facets of the event and enables you to present the continual change of shots that help retain your viewers' attention. To accomplish this, 然而, you need a live video switcher.

There are many appliances that can get the job done, from inexpensive SD switchers like 罗兰的VR-3 (around $2,000) to HD switchers like NewTek's popular TriCaster series, which can cost well into five figures. 如果你有一台相当强大的电脑, 然而, the most affordable approach may be to add one or more capture cards to your computer and use a program like Telestream Wirecast 来管理不同的拍摄角度. While switching appliances definitely have their place, Wirecast offers features that low-cost appliances simply can't match, 比如内部标题工具, and the ability to mix on-demand video and screen-based presentation into the stream.

This is the first of a three-part tutorial on using Wirecast to mix two streams of video and other disk-based content. 在第一个教程中, I'll describe how to install and configure two Blackmagic设计 Intensity Pro cards into an HP Z600 for switching with Wirecast. 在 second tutorial, I'll do the same with the Viewcast 820e, which is a single card with dual-channel inputs.

在第三篇文章中, I'll discuss the results of performance tests that reveal when a single-core computer like the HP Z400 can get the job done, and when you need a dual-core computer like the Z600. 我将展示两张卡的结果, so we'll see whether a dual-channel card offers performance efficiencies that installing multiple cards can't match. Or, vice versa--since I haven't run all the tests yet, it's hard to know.

黑魔法强度专业卡

在 Intensity support pages on the Blackmagic设计 website, Blackmagic识别认证工作站, 包括Z400和Z600, 推荐的主板. In terms of hard minimum system requirements for Windows, you’ll need a 64-bit operating system with at least 4GB of memory and an “accelerated graphics card,” as a ”motherboard integrated graphics card is not adequate and will not work properly.” 

你可以看到 图1(下面), Intensity Pro是一张非常小的卡片, with two HDMI slots on the bracket and color-coded connectors on the dongle. I typically tape the inputs together to make them easier to find, since the dongle is usually located behind the computer in some dark region of my office and finding the right connector can be a hassle. Between that and the color coding on the connectors, getting hooked up should be pretty simple.

图1. The Intensity Pro is a small card with two HDMI ports on the bracket and color-coded connectors on the dongle.