3
Known issues
channel 4. However, if you capture the HDMI surround sound output from
MXO2 using Avid Media Composer/Symphony on another MXO2 system,
Media Composer/Symphony will assume that C is on track 3 and LFE is on
track 4. This means that the C and LFE channels won’t be in the correct
order in your captured file. To play back and output your captured file
correctly on the MXO2 HDMI output, you can select
Direct or Direct,
surround tracks in SMPTE order
in the Audio Project Settings dialog
box to map track 3 to output channel 4 and map track 4 to output channel 3.
(Ref# VPG-1676)
• In order to perform an audio-only capture in Avid Media
Composer/Symphony using Matrox MXO2, you must have an analog video
input source (Composite, S-Video, or Component) selected in the
A/V Input
pane of the Matrox preferences window, although the video input source
doesn’t need to be connected. (Ref# VPG-1795)
• In Adobe Premiere Pro, if
Matrox Device Control is selected without
having
Matrox Recorder selected as the capture format, the Capture
window may become unresponsive. To avoid this, make sure that
Matrox
Recorder
is selected as the capture format before selecting Matrox Device
Control
. To set the capture format, choose File > Capture, and then under
Capture Settings, click Edit. To set device control, choose Premiere
Pro > Preferences > Device Control
. (Ref# VPG-3961)
Matrox MAX H.264 encoding (MAX option)
• When encoding for QuickTime (.mov) using an application other than Apple
Compressor, and your source video must be scaled, don’t select the Matrox
MAX H.264
De-interlace video option in the QuickTime Standard Video
Compression Settings
window. (Ref# 50975 and 51038)
• When using the Matrox MAX H.264 codec in Apple Compressor, if your
source video is being scaled to a non-SD or non-HD resolution (i.e. iPod,
iPhone) for encoding, and the Matrox MAX H.264 Retain aspect ratio
when scaling
option is selected, your source video’s aspect ratio may not
be maintained if you’re encoding to a larger aspect ratio (pillarbox video). If
using Compressor v3.5 or later, this issue may be resolved by disabling the
Matrox MAX H.264
Hardware scaling option (this option is disabled by
default when using a Matrox MAX H.264
Fast Encode setting), and
selecting
Preserve source aspect ratio from the Padding list in
Compressor’s Geometry pane. (Ref# 52471)
• In Apple Compressor, when the Matrox MAX H.264
Hardware scaling
option is enabled (this option is enabled by default when using a Matrox
MAX H.264
High-Quality setting), and your source video contains a
graphic that is added to the video image (i.e. timecode), the graphic is also
scaled if your video must be scaled for encoding. This results in a graphic
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