Matrox MXO2 PCIe Host Adapter - Manual (Page 283)

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Specifying your Matrox MAX H.264 settings
2 Under H.264 Level , select the H.264 level that you want for your encoded
video. The available levels depend on your encoded video’s frame size and
frame rate.
Remarks
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Use H.264 level 4.0 if you want to create Matrox MAX H.264 files
intended for mass replication of Blu-ray Discs. You can use either level
4.0 or 4.1 if you want to author and burn individual copies that are
compatible with Blu-ray Disc players.
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Use H.264 level 3.1 to create HD video for use with Apple iPad.
3 Under Algorithm , select the entropy coding method to be used during
compression:
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CABAC Encodes the video stream using the H.264 Main profile. This is
the only method available for Matrox .264 files.
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CAVLC Encodes the video stream using the H.264 Baseline profile.
This method is recommended when creating Matrox .mp4 files at small
frame sizes, such as for Apple iPhone devices or the web.
4 Under Data Rate (Mb/sec) , you can select the encoding type and various
data rate settings for the H.264 compression.
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Encoding Type From this list, select one of the following:
• Variable bit rate (VBR) Video is compressed at varying data rates
based on the complexity of the video and your specified minimum and
maximum data rates. The Matrox MAX H.264 codec analyzes and
encodes each frame to deliver the highest possible quality at your target
data rate.
• Constant bit rate (CBR) Video is compressed at your specified
target data rate, which is useful when you need to limit or predict the
size of your video file. However, if your video is very complex (such as
scenes with many colors, sharp edges, or transitions), you’ll need to
H.264 level
Maximum
frame size
Maximum
frame rate
(fps)
Maximum
data rate
(Mb/sec)
2.0 352 Ч 288 29.97 2
3.0 720 Ч 576 29.97 10
3.1 1280Ч 720 29.97 14
4.0 1920 Ч 1080 29.97 20
4.1 1920 Ч 1080 29.97 50
4.2 1920 Ч 1080 59.94 50