User guide

4Sight 17
Administrator Guide
Version 3.1
4Sight supports trick play (fast forward and fast backward) based on the
RTSP RFC 2326 by using play command with a specific SCALE attribute.
The range of speeds allowed is by default [-128, -1] for fast backward and
[1, 128] for fast forward. You can change them via the streaming server
configuration file (see “File module parameters” on page 118).
NOTE The fast forward/fast backward rendering depends on the way the file is
encoded: 4Sight sends only key frames when fast forwarding. The
playback quality is related to the frequency of key frames. It is increased
when there are more key frames.
4Sight is available on Windows and Linux.
Supported file formats
4Sight streams MPEG-4 files (provided that the files are hinted).
Monitoring and Administration
4Sight allows network operators to dynamically monitor streaming
through a web-based interface, either online during operation or offline
with a log file mechanism.
An SNMP interface is also provided for integration into existing
supervision systems.
Performance
In streaming, 4Sight can support up to 400 simultaneous users, at
1.5 Mbps.