Pearl Mini User Guide
Configure video encoding
Table 45
Video encoding settings
Setting
Description
H.264
H.264 provides high quality video while using low bandwidth. This is the default and
preferred codec for the Pearl-2 and Pearl Mini.
Motion
JPEG
(Pearl-2
and Pearl
Mini
only)
This codec is suitable for streaming and recording video, however you get lower quality
images and it requires a large amount of bandwidth. Motion JPEG does not support audio.
Key
frame
interval
l
The key frame interval feature specifies how often a key frame (a frame that contains
all the pixels) is sent when streaming the video. This setting also impacts how quickly
a video moves through the frames when a viewer uses the search function of their
media player.
l
Increasing the number of seconds between key frames can significantly reduce your
bandwidth and system resource usage with minor impact to your video quality. A
good rule of thumb is to keep the interval between 2 to 3 seconds and decrease the
key frame interval as the motion increases.
l
Try different settings and note changes in the video quality. If your video quality is
poor and jittery you may need to decrease the interval between key frames. If you
have unlimited bandwidth and system resources you can choose an option to stream
key frames only.
Frame
rate
Frame rate reflects the number of images that are encoded per second. Reducing the frame
rate for a channel reduces bandwidth usage, and vice versa.
The system's ability to maintain a set frame rate is based on several factors, for example:
l
overall system load affects the ability for the device to process pixels;
l
available network bandwidth;
l
the source and stream frame size (resolution);
l
the type of motion that is captured; and
l
number of users accessing the stream.
When adjusting the frame rate, you may need to try different values to achieve the best
outcome.
Bitrate
In general, higher bitrates mean higher image quality, but more bandwidth is needed for
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