User guide

116
Chapter 10, Using the Matrox MAX H.264 Codec
10 Select the H.264 level that you want to be used to encode your video.
¦NoteUse H.264 level 3.1 to create HD video for use with Apple iPad.
11 Select the Noise filter level that will be applied to your video before
encoding. Increasing the noise filter level reduces the amount of high
frequencies in your source video by softening the high-detail portions of
your video. Since high frequencies require more bits to encode, increasing
the noise filter level leaves more bits available for the encoding of other
frames, which can improve the overall quality of your encoded video.
However, if you lose too much detail in your encoded video you may need to
decrease the noise filter level.
12 Click OK.
13 In the Movie Settings window, under Sound, click Settings to specify
your audio settings, and then click
OK.
Remarks
$ When limiting the data rate of your encoded file to a specified bit rate (see
step 6), please note that the encoded audio may cause the overall data rate
to exceed the data rate limit. To minimize the impact of the encoded audio
on the overall data rate, select AAC as the audio format for your encoded
file. To do this, in the
Sound Settings window, select AAC from the
Format list.
$ To export a clip for use with Apple iPod or iPhone devices, you must
choose AAC (advanced audio coding) as your export audio file format. To
do this, in the
Sound Settings window, select AAC from the Format
list.
14 In the Movie Settings window, click Size and select the frame size that you
want for your encoded video from the
Dimensions menu.
H.264 level
Maximum
Frame size
Maximum
Frame rate
(fps)
Maximum
Data rate
(Mb/s)
2.0 352×288 29.97 2
3.0 720×576 29.97 10
3.1 1280×720 29.97 14
4.0 1920×1080 29.97 20
4.1 1920×1080 29.97 50
4.2 1920×1080 59.94 50