User guide

262
Chapter 18, Using Matrox MAX H.264 Capture
¦NoteWhen using the Matrox MAX H.264 codec to capture to a 1440×1080
or 1920 ×1080 progressive video format, the highest supported frame rate is
29.97 fps. The specified frame size and frame rate determine the H.264 levels
available for your encoded video. For details on the maximum frame size and
frame rate supported for each H.264 level, see “Specifying your Matrox MAX
H.264 settings” on page 248.
$ Scan Mode Determines the scan mode of your captured video
(
Interlaced or Progressive). This may be automatically set for you
based on your specified file type, frame size, and source video format.
$ Aspect Ratio This is set to 16:9 when capturing to HD. When
capturing to SD, you can select
4:3 to capture to the standard TV screen
format, or
16:9 to capture to the widescreen 16:9 format.
$ Aspect Ratio Conversion If your source video and captured video
have different aspect ratios, select the option that you want for the aspect
ratio conversion:
• 16x9 Letterbox Captures the widescreen 16:9 picture as letterbox
video by adding black bars at the top and bottom of the picture for
display on a standard 4:3 television screen.
• 4x3 Pillarbox Captures the standard 4:3 picture as pillarbox video by
adding black bars at the left and right sides of the picture for display on
a widescreen 16:9 television screen. (This option is not available for
frame sizes smaller than 720×576.)
• Anamorphic Captures the video as horizontally or vertically
compressed video (the aspect ratio of your source video is not
maintained).
• Center Cut Captures the widescreen 16:9 picture by evenly cropping
the left and right sides of the picture for display on a standard 4:3
television screen.
• Center Zoom Captures the standard 4:3 picture by evenly cropping
the top and bottom edges of the picture for display on a widescreen
16:9 television screen.
$ Also capture Matrox MPEG-2 I-frame AVI Select this if you’re
capturing to a Matrox .mp4 file, and you’d like to simultaneously capture
to a Matrox MPEG-2 I-frame .avi file in the same format as your source
video. For example, if your source video is 1080i @ 29.97 fps, your
Matrox .avi file will also be 1080i @ 29.97 fps. To configure your
MPEG-2 I-frame codec settings, click
Configure. The settings are the
same as when capturing clips using Adobe Premiere Pro as explained in
“Selecting your MPEG-2 I-frame settings” on page 80.
2 Under Audio Capture Format, you can select the audio format settings you
want for your captured clips: