The MediaBox consumes little
memory for the OS and GUI management. A minimal
configuration can ran on as little of 16Mb of RAM.
However, the more servers or encoders you start, the
MediaBox will start consuming more memory. Default memory
for the MediaBox 2600 series is 128Mb and it should
work on most situations, even if all servers are started.
Depending on the number of concurrent users you are planning
to use, you might need to order more memory (see Memory
Upgrade Pack), under
Sounds gets garbled, what
should I do?
Under heavy load, the encoded output can get garbled.
This is due to low CPU resources. Please ensure that your
total CPU load does not exceed 60%. To get realtime CPU
stats, you use the system stats options or from a command
line type the following command:
system% vmstat 1
Stop the encoder, change the encoder settings* and restart.
Usually the higher the encoding rate is the more CPU is
When encoding multiple instances, some encoder output
This is due to the fact that all IMUX devices operate at
a fixed sampling rate of 44100Hz. Selecting other encoding
rates from your encoder application might cause a sampling
mismatch. You can change the IMUX sampling rate from the
Sound Configuration Options or by simply editing /opt/oss/options.cfg.
The Mediabox needs to be rebooted after this change.
What is the best audio encoding rate?
Depending on your broadcast application, several audio
encoding rates can be selected. For voice applications
stream rates in between 5-20Kbps will work just fine. For
voice combined with music we recommend sampling rates in
between 20-56Kbps. For music encoding rates from 56 to
128Kbps will produce an adequate response. For stereo music
please select rates over 64Kbps. Depending on your available
bandwidth one might choose to trade quality for quantity.
Here is an example:
100 16Kbps streams = 12
How many simultaneous
users can the Mediabox serve?
Provided that your ISP can sustain data rates of 100Mbs,
the MediaBox can stream as follows:
6,400 16Kbps streams
1,828 56Kbps streams
800 128Kbps streams
The more streams you serve, the more bandwidth and memory
you will use. Always check the health on the MediaBox with
the "Stats" selection. This example was calculated using MP3
streams. When using Real streams you need to purchase an
license in order to be able to use more simultaneous