Type Generic; Type Break; Type Qss-Streamlet; Type Yahoo - Juniper MEDIA FLOW CONTROLLER 2.0.4 - ADMINISTRATOR S GUIDE AND CLI Administrator's Manual

Media Flow Controller Overview

Type generic

The type generic (formerly type 0) virtual player provides options for nearly all virtual player
functions.
•
assured-flow
than the configured connection max-bandwidth. AFR is defined in a kilobits per second
rate, auto (auto-calculate), or signaled with a query param.
•
connection max-bandwidth
session bandwidth used does not exceed this value, even if there is available bandwidth in
the link. When it is a full download, Media Flow Controller tries to allocate this value to the
session.
•
fast-start
speed or the detected available bandwidth; or by a value determined by one of the fast-
start options: either a static size value, a static time value, or a query-string-parm name.
•
full-download
configured connection max-bandwidth and possibly exceeding the configured assured-
flow rate.
•
hash-verify
•
—Implement seek (currently only for FLV media files) based on the value of query-
seek
string-parm. This function allows the client player to seek a specific part of the media
content; for example, to jump ahead a few minutes or go back a few minutes in the video.

Type break

The type break (formerly type 1) virtual player offers a subset of Media Flow Controller
delivery options: assured-flow, connection max-bandwidth, fast-start, hash-verify, and
seek options (see

Type qss-streamlet

The type qss-streamlet (formerly type 2) virtual player includes connection max-bandwidth
(see Type generic
map rate argument extracts the value from the URL to calculate the assured flow rate needed
for each HTTP request. By default, the match string (length must be 2 bytes) is extracted by
going to the end of the URL and skipping 12 Bytes from the end. The value in that location is
mapped to the configured rate in kbps. Example:
http://video.example.com/public/BBB87026/xy_750_1938344/
AC60E15B2A7C4A45AC4C1472E2AC0816_030000003F.flv
In the URL, the value
corresponding assured flow rate (1000Kbps) is applied.

Type yahoo

The type yahoo (formerly type 3) virtual player includes assured-flow, connection max-
bandwidth, and seek options (see
54 Media Flow Controller Virtual Player Functions
—Assure that content is delivered at the specified rate (AFR), but no more
—Maximum allowable bandwidth for a session. The actual
—Deliver the 1st set of kilobytes at either the configured maximum session
—
Allow the delivery to download at the fastest possible speed, up to the
—Verify the authorization hash value specified in the URL query string.
Type generic for details).
for details) and AssuredFlow via a special rate-map attribute. The rate-
03 (12 Bytes from the end of the URL) is extracted, and the
Type generic
Media Flow Controller Administrator's Guide
for details) as well as these special options:
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