Visual Circuits Mantis Media Gateway, User Manual

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W
EB
V
IEW™
67
Raw Data
Total amount of data, in bytes, stored on the chip.
Disk Underflow
Data flow from the disk is not sufficient to keep the read buffers full.
This may be caused by:
❏
Disk data transfer rate has been exceeded
❏
File error is generating improper read errors
❏
If the problem occurs with a non-Mantis hard drive, there may be
a bad or incorrect hard drive driver
❏
MPEG file encoded at too high a rate for application: see
Encoding Requirements and Recommendations on page 15
Data Underflow
The flow of data to the decoder cache has slowed and the decoder may
not be able to efficiently decode and transmit frames. Typically this can
be ignored unless playback is effected.
❏
One symptom is that the decoder is not incrementing by 1 per file.
If it is incrementing in the hundreds every few seconds there may
be a problem with the MPEG file.
❏
The problem is how the MPEG file was originally encoded.
When the Diagnostic Log is enabled, the Mantis automatically records
Data Underflow. Recording occurs at the end of each 24-hour period,
(23:59).