---
title: About This Manual
framework: quicktime
role: article
path: apple-archive/documentation/QuickTime/QTSS/Preface
---

# About This Manual

Explains how to create plug-in modules for the QuickTime Streaming Server.

## What’s New

Version 5.0 of the QTSS programming interface provides the following new features:

- These new internal server preferences have been added: `disable_thinning`, `player_requires_rtp_header_info`, and `player_requires_bandwidth_adjustment`. - These new preferences have been added to the `QTSSFileModule` module for compatibility with 3rd Generation Partnership Project (3GPP) players: `compatibility_adjust_sdp_media_bandwidth_percent` and `enable_player_compatibility`. - RTP play information is now enabled by default in the `QTSSReflectorModule` module. Use the new preference, `disable_rtp_play_info` to disable RTP Play information. Another new `QTSSReflectorModule` preference is `reflector_rtp_info_offset_msec`. For compatibility with 3GPP players, these preferences have also been added to the `QTSSReflectorModule` module: `enable_play_response_range_header`, `enable_player_compatibility`, and `force_rtp_info_sequence_and_time`. - This new preference has been added to the `QTSSFlowControlModule` module: `flow_control_udp_thinning_module_enabled`.

The following changes have been made to existing preferences:

- Default size of the `QTSSFileModule` preference `shared_buffer_unit_k_size` has been increased from 32 to 64. - Default size of the `QTSSFileModule` preference `private_buffer_unit_k_size` has been increased from 32 to 64.

The `enable_rtp_play_info` preference has been removed from the `QTSSReflectorModule` module.

The `-D` command line option has been added to the StreamingServer. When specified, the `-D` option outputs performance status information.

The file `streamingloadtool.conf`, installed in `/Library/QuickTimeStreaming/Config`, has new file tags:

- `player` *text*, where *text* is the name of the RTSP player. The information is sent to the server as the UserAgent header. - `sendoptions` *setting*, where *setting* is `yes` or `no`. If `yes`, a Send Options request is made before the `DESCRIBE` statement. - `requestrandomdata` *setting*, where *setting* is `yes` or `no`. Set *setting *to `yes` to ask for random data from the server. - `randomdatasize` *setting*, where *setting* is a number from 0 to 262144 that specifies the number of random bytes the server should send.

## Conventions Used in This Manual

The `Letter Gothic` font is used to indicate text that you type or see displayed. This manual includes special text elements to highlight important or supplemental information:

**Note:** Text set off in this manner presents sidelights or interesting points of information.

**Important:**

Text set off in this manner—with the word Important—presents important information or instructions.

**Warning:** Text set off in this manner—with the word Warning—indicates potentially serious problems.

## For More Information

Go to [http://www.opensource.apple.com](http://www.opensource.apple.com) to register as a member of the Apple open source community. Then download the source code for the Darwin Streaming Server at [http://www.publicsource.apple.com/projects/streaming](http://www.publicsource.apple.com/projects/streaming) . The source code’s Documentation directory contains valuable information:

- `AboutTheSource.html` - `DevNotes.html` - `SourceCodeFAQ.html`

The following RFCs provide additional information of interest to developers of QuickTime Streaming Server modules and are available at many locations on the Internet:

- RFC 2326, Real Time Streaming Protocol (RTSP) - RFC 1889, RTP: A Transport Protocol for Real-Time Applications - RFC 2327, SDP: Session Description Protocol - RFC 2616, HTTP 1.1

For an overview of the Darwin Streaming Server and links to the latest QuickTime information, go to [http://developer.apple.com/darwin/projects/streaming](http://developer.apple.com/darwin/projects/streaming) .

Go to [http://developer.apple.com/documentation/quicktime](http://developer.apple.com/documentation/quicktime) for QuickTime developer documentation.

Communicate with other Darwin Streaming Server developers by joining the discussion list at [http://lists.apple.com/mailman/listinfo/streaming-server-dev](http://lists.apple.com/mailman/listinfo/streaming-server-dev) .

See what with other Darwin Streaming Server developers are doing by joining the discussion list at [http://lists.apple.com/mailman/listinfo/publicsource-modifications](http://lists.apple.com/mailman/listinfo/publicsource-modifications) .

[Next](../Concepts/QTSSConcepts.html)

Copyright © 2002, 2009 Apple Inc. All Rights Reserved. [Terms of Use](http://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](http://www.apple.com/privacy/) | Updated: 2009-06-01