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Chapter 5, Using Matrox VS4 with Telestream Wirecast
be mono (not supported for embedded audio in an .avi file, which is
always stereo).
$ Stereo Creates a separate .wav or .aac audio file for each audio pair
selected. For example, if four audio channels are selected, two stereo
audio files will be created. The embedded audio in an .avi, or .mov file
will also be stereo.
¦NoteSeparate .wav audio files can have a maximum file size of 4 GB. See
“WAV audio recording” on page 76 for the approximate maximum duration
for a separate .wav audio file based on the audio settings. This limitation does
not apply to separate .aac audio files.
•
Embedded audio only Select this if you want to embed the first audio
pair (channel 1-2) in the video file only. Separate audio files will not be
created (the
Audio File Type will be ignored). If you’re recording to an .avi
file, the
Audio Channel Type will be set to Stereo.
•
AAC bit rate For AAC audio, drag the bit rate slider to select the bit rate
(in kilobits per second) that you want for your recorded audio. This slider is
available for separate .aac audio files only.
Saving and loading record presets
In the
Matrox ISO Record dialog box, once you’ve specified the Matrox ISO
record settings that you want for a VS4 input, you can save your settings as a
preset and load the preset at any time to apply those settings to an input with a
compatible video format.
• Save To save the current settings of a VS4 input as a custom preset, click
beside the input and choose
Save Preset. You’ll then be prompted to
enter a name for your preset. Because the video file type is saved in the
preset, you should include the video file type, such as AVI, in your preset
name so that you can easily identify your custom presets.
• Load When you load a preset, the video file type, codec settings, audio file
type, and audio settings are applied according to the preset. To load a preset
for a VS4 input, click beside the input, choose
Load Preset, and then
select the preset that you want in the displayed dialog box. Only presets that
are compatible with your input’s video format will be listed.
¦NoteTo delete a preset, from the Load Preset dialog box, select the preset,
and then click .
Copying and pasting record settings
You can copy and paste the record settings from one VS4 input to another.
• Copy To copy the settings for a VS4 input, click beside the input and
choose
Copy.
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