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Chapter 5, Using Matrox VS4 with Telestream Wirecast
Overview
You can use Matrox VS4 as an input device to feed live video and audio to
Telestream Wirecast for streaming, and simultaneously record all your original
video feeds to disk. The easy-to-use Matrox ISO recording tool lets you create
high-quality recordings of your feeds, ready for post-event editing in your
favorite editing application. The combination of Matrox VS4 and Telestream
Wirecast for Windows lets you switch or mix multiple live video feeds and
pre-recorded clips while adding graphics and effects. This solution is ideal for
Internet broadcasts of sports, religious services, corporate meetings, and other
live events. Tight integration of Matrox VS4 using the Wirecast input source
SDK ensures the highest level of reliability and stability for your streaming
productions. Matrox VS4 automatically detects the presence, resolution, and
frame rate of all your inputs. Because all inputs on Matrox VS4 are independent,
you can use HD and SD cameras in the same production.
Using Wirecast, you can choose any stereo pair for your streaming production
while simultaneously recording all eight channels to disk using the Matrox ISO
recording tool. You have complete flexibility to go from a simple stereo mix to
surround sound for your post-event editing needs.
You can use up to two Matrox VS4 cards in your system. In a two-card system,
all eight VS4 inputs can be used as input devices to feed live video and audio to
Telestream Wirecast for streaming. ISO recording is supported on the four inputs
of the primary VS4 (see “Selecting your primary VS4 card” on page 93).
Using Matrox VS4 for streaming
Matrox supports a maximum of two VS4 cards per system. With four SDI inputs
on each VS4 card, your VS4 system offers up to eight inputs for your live video
feeds. This section provides instructions on how to use VS4 as the input device
for video and audio in Telestream Wirecast for streaming. For details on how to
add shots in Telestream Wirecast, see your Wirecast documentation.
1 Connect your video source(s) to the VS4 SDI input(s) (see “Connecting
devices to Matrox VS4” on page 11).
¡ Important If connecting sources with different video formats, the sources
must have compatible frame rates. For a list of compatible frame rates, see
“Supported input formats” on page 10.
2 In Telestream Wirecast, add a new shot for every VS4 input source that you
want to stream.
3 For each VS4 shot added in step 2, the corresponding input’s audio is
automatically selected as the audio source. If desired, you can change a
shot’s audio source to another VS4 input or to a system audio source as
explained in your Wirecast documentation.
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