User guide

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Chapter 9, Using Matrox MXO2 with Supported Programs
1 Connect the video and audio input sources that you want to stream to the
corresponding inputs on your MXO2 hardware.
2 Specify the MXO2 A/V input settings in the MXO2 preferences window
(see “Specifying your A/V input settings” on page 57).
3 Start your media streaming encoding application, and select a Matrox 8-bit
format as the source video device in your application. The format that you
select depends on whether or not you want to scale your source video for
streaming:
$ No scaling In your application’s source video device list, select the
Matrox 8-bit format that matches the format of your source video.
$ Scaling For increased performance and decreased CPU usage when
scaling your source video, we recommend that you enable the scaling
option available in the MXO2 A/V input settings (see “Specifying your
A/V input settings” on page 57). When the MXO2 scaling option is
enabled, scaling is performed by MXO2’s hardware scaler, which frees
your system’s resources for other tasks.
• MXO2’s scaling option enabled In your application’s source video
device list, select the Matrox 8-bit format to which you want to scale
your source video. In other words, select that Matrox 8-bit option that
matches the format that you want to output. The format that you select
must have a compatible frame rate to your source video. If the
resolution that you want to output does not appear in the list of
available Matrox formats, select the resolution that is closest to your
desired output size. For example, if you want to scale your source video
to 640x360, select
Matrox MXO2 - NTSC YUV 8-bit. You can later
specify the exact output resolution in your application’s output settings.
• MXO2’s scaling option disabled In your application’s source video
device list, select the Matrox 8-bit format that matches the format of
your source video. In this case, the scaling will be performed entirely
by your application when you specify the output resolution in your
application’s output settings.
¦NoteMatrox 10-bit format options are not compatible for use with live
media streaming applications.
4 Select Matrox MXO2 Audio Input as the source audio device in your
application.
5 Set any additional encoding options in your application as you would
normally, and then output your video.
¦NoteIf using Adobe Flash Media Live Encoder, for increased performance
when scaling the source video for streaming and MXO2’s scaling option is
enabled, we recommend that you set the
Input Size encoding option
resolution to match the resolution of the format that you selected in step 3.