57
3.8.3 MPEG4 Profile
It’s MPEG4 encoder mode in this profile.
Resolution:
There are three resolutions in this profile: VGA, QVGA and QQVGA.
Rate Control:
Defines the rate control method of this profile. There are two options:
Constant Bit Rate (CBR) or Variable Bit Rate (VBR). For CBR, the
video bit rate is between low to high bandwidth based on different
resolutions. User can set the desired bit rate to match the limitation of
bandwidth. For VBR, user should choose the quality level to set the
video quality rather than bit rate. The quality level is between 1 and
100. The higher value can reach the better quality but of course will
consume higher bandwidth.
Max Frame Rate:
Defines the targeted frame rate of this profile. For example, set the
frame rate to 15 fps, then the image will be updated for 15 frames per
second as possible. User need to set reasonable max frame rate
versus video quality under the limited bandwidth.
GOP Control:
Defines the Intra/Inter-frame (I/P) ratio of this profile. For example, set
the GOP to 30, then the video stream will have one Intra-frame every
30 frames.
