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Chapter 10, Using the Matrox MAX H.264 Codec
frame size (horizontal×vertical). If entering a custom frame size, the
minimum frame size is 64×64, and the maximum frame size depends on
the selected H.264 level. The horizontal and vertical values must be even
numbers.
¦NoteThe available frame sizes in the list depend on the selected H.264 level.
If the compression frame size differs from your source video’s frame size,
MXO2’s onboard scaler will either upscale or downscale your source video.
$ Pixel aspect ratio If you entered a custom compression frame size,
specify a pixel aspect ratio for your encoded video. You can select a pixel
aspect ratio from the list, or enter a custom value:
• Custom Enter a custom pixel aspect ratio using a decimal value.
• Square Use this for video that will be displayed on a computer, or
when exporting to 1280×720 or 1920×1080.
• NTSC (4:3) Sets the pixel aspect ratio to 4:3 using 720×480 pixels.
• NTSC (16:9) Sets the pixel aspect ratio to 16:9 using 720×480
pixels.
• PAL (4:3) Sets the pixel aspect ratio to 4:3 using 720×576 pixels.
• PAL (16:9) Sets the pixel aspect ratio to 16:9 using 720×576 pixels.
• DVCPRO HD 720p Sets the pixel aspect ratio to 16:9 using 960×720
pixels.
• DVCPRO HD 1080i 59.94 Sets the pixel aspect ratio to 16:9 using
1280×1080 pixels.
• DVCPRO HD 1080i 50 / HDV Sets the pixel aspect ratio to 16:9
using 1440×1080 pixels.
$ Color space If you entered a custom compression frame size, specify a
color space for your encoded video.
$ Frame rate Select the frame rate that you want for your encoded video.
$ Algorithm Select the entropy coding method to be used during
compression:
• CABAC Uses the CABAC coding method, and defines the video
stream as H.264 Main profile.
• CAVLC Uses the CAVLC coding method, and defines the video
stream as H.264 Baseline profile when
Distance between P frames
is set to 1. Otherwise, the video stream is defined as H.264 Main
profile. This method is not supported when encoding to a frame size
that has a width greater than 720.
$ Average data rate Enter the average amount of data, in Mb/s or Kb/s,
that will be transferred by MXO2’s variable bitrate video encoder. The
minimum and maximum data rates depend on the selected H.264 level.