CODEC AND PROTOCOL SUPPORT HELIX MEDIA …

1 CODEC AND PROTOCOL SUPPORTHELIX MEDIA DELIVERY PLATFORM HELIX Producer 14 and HELIX Server Revision Date: 27 October 2011 RealNetworks, Inc. P. O . B o x 9112 3 Seattle, WA 98111-9223 2011 RealNetworks, Inc. All rights in this document is subject to change without notice. All rights reserved. No part of this book may be reproduced, in any form or by any means, without permission in writing from RealNetworks, , the HELIX logo, the Real "bubble" (logo), RealProducer, HELIX Producer, RealSystem Server, HELIX Universal Server, RealAudio, RealVideo, RealMedia, RealPlayer, and RealOne Player are all trademarks or registered trademarks of RealNetworks, product and corporate names may be trademarks or registered trademarks of their respective owners.

2 CONTENTSiiiINTRODUCTION1 How This Guide Is Organized ..1 Conventions Used in this Guide ..2 CHAPTER 1: HELIX PRODUCER ENCODING Producer Operating Systems ..3 Output Formats and Codecs ..3 Feature Availability ..4 Graphical and Command Line Applications ..4 Input Methods ..5 Network Input File Input Formats ..5 Compressed File Input Formats ..6 Output Formats ..63 GPP Release 5 ..73 GPP Release 6 .. 1 ..8 ISMA 2 ..8MP3 ..10MP3 ..10 RealAudio ..10 Video Codecs ..12 MPEG-4 Part 2 .. Destinations ..13 File Methods ..14 CHAPTER 2: HELIX SERVER FILE FORMATS AND Format Summary ..16 CODEC Summary ..17 Flash FLV and F4V ..17 AAC ..18 AMR.

3 19 ISMA Compliance .. 20 MPEG-4 Part 2 .. 20 QCELP .. 21 RealMedia .. 21 RealAudio .. 22 Windows MEDIA .. 22 Windows MEDIA .. 22 Silverlight .. 23 Uncompressed and Older 23 CHAPTER 3: HELIX SERVER STREAMING 24 RTSP .. 24 RTSP MEDIA 24 Features Available with 25 Packet Formats for RTSP ..25 RTSP Proxies .. 26 RTMP .. 27 RTMP MEDIA URLs ..27 Flash PROTOCOL SUPPORT ..28 HTTP 29 Segmentation Process ..29 Playlists for Segmented Content .. 30 HTTP Live MEDIA 30 Rate 31 CHAPTER 4: UNIVERSAL 32 MEDIA Encoding for Universal Delivery .. 32 Create an MPEG-4 Output .. 32 Add a Template .. 33 Customize the the MPEG-4 Clip.

4 35 Universal Content Source Path ..35 RTSP Streaming of the Universal Clip .. 35 RTMP Streaming of the Universal 35 HTTP Live Delivery of the Universal Clip .. 36 HTTP Live Setup .. 36 HTTP Live URL .. 37 APPENDIX A: STREAMING MEDIA 38 Video Screen Sizes .. 38 Common Dimensions in 4:3 and 16:9 Aspect Ratios .. 38 Mobile Device Screen Sizes ..38 Modifying Aspect Ratios ..39 Multi-Rate Streams .. 39 Rate 39 MEDIA Client Rate Shifting Characteristics .. 40 Audio and Video Properties for Rate-Shifting Clips .. 411 INTRODUCTION This document explains the CODEC and file format SUPPORT in the following versions of HELIX Producer encoding products and the HELIX Server streaming MEDIA server: RealProducer, HELIX Producer, and HELIX Mobile Producer Release 14 HELIX Server and HELIX Mobile Server Release covers HELIX Server SUPPORT for various streaming protocols, including RTSP, RTMP, and HTTP Live.

5 It also demonstrates how you can use HELIX Producer and HELIX Server to reach a large number of MEDIA players using a single MEDIA stream encoded with the and AAC This Guide Is OrganizedChapter 1: HELIX Producer Encoding FormatsHelix Producer can encode MEDIA from a file or live input into a variety of streaming file formats. This chapter introduces you to the CODEC and file formats available with HELIX 2: HELIX Server File Formats and CodecsThis chapter provides an overview of the file formats and codecs that HELIX Server can 3: HELIX Server Streaming ProtocolsTo reach multiple MEDIA players, HELIX Server supports the most popular streaming protocols.

6 This chapter covers MEDIA delivery using RTSP, RTMP, MMS, and HTTP Live. Chapter 4: Universal DeliveryThis chapter walks you through the process of using HELIX Producer to encode a clip using the and AAC codecs and then streaming that clip to different types of MEDIA clients using HELIX A: Streaming MEDIA TipsThis appendix provides tips for creating good streaming MEDIA Delivery Platform CODEC and PROTOCOL SUPPORT Conventions Used in this Guide2 Conventions Used in this GuideThe following table explains the typographical conventions used in this ConventionsConventionMeaningemphasisBold text is used for in-line headings, user-interface elements, URLs, and e-mail text is used for technical terms being introduced, and to lend emphasis to generic English words or font is used for fragments or complete lines of programming syntax (markup).

7 Syntax emphasisBold syntax character formatting is used for program names, and to emphasize specific syntax syntax character formatting denotes variables within fragments or complete lines of syntax.[options]Square brackets indicate values that you may or may not need to use. As a rule, when you use these optional values, you do not include the brackets themselves. choice 1|choice 2 Vertical lines, or pipes, separate values that you can choose indicate nonessential information omitted from examples. 3 CHAPTER1 Chapter 1: HELIX PRODUCER ENCODING FORMATSThis chapter explains the basic capabilities of HELIX Producer products, focusing on the MEDIA encoding formats supported.

8 It explains the types of outputs you can create, listing the audio and video codecs that each output format can Producer ProductsHelix Producer products can encode MEDIA in popular streaming and download formats, including 3 GPP, MPEG-4, MP3, and RealMedia. HELIX Producer 14 is available in three versions: HELIX Mobile Producer The fully featured HELIX Mobile Producer addresses the needs of the mobile industry with SUPPORT for 3 GPP Release 6 and Release 5 outputs in addition to MPEG-4, MP3, and RealMedia outputs. HELIX Producer HELIX Producer encodes MPEG-4, MP3, and RealMedia outputs, addressing the streaming MEDIA needs of a wide range of desktop clients.

9 RealProducer RealProducer encodes RealAudio and RealVideo outputs. It is available for free. For More Information: Refer to your RealNetworks sales representative for pricing information for HELIX Mobile Producer and HELIX Producer. Supported Operating SystemsAll HELIX Producer products are available on the following platforms: Windows XP with Service Pack 3 (SP3) Windows Vista Windows 7 Windows Server 2003 and 2008 Output Formats and CodecsThe following table summarizes output format and CODEC SUPPORT across HELIX Producer Producer Output Format and CODEC SUPPORT Format or CodecHelix Mobile Producer HELIX ProducerRealProducer3 GPP Release 5 and 6 outputsyes nonoMPEG-4 outputyes yes noISMA 1 and 2 compliant outputsyes yes noMP3 audio outputyes yes no (Table Page 1 of 2) HELIX MEDIA Delivery Platform CODEC and PROTOCOL SupportCHAPTER 1.

10 HELIX Producer Products4 Feature AvailabilityThe following table summarizes general feature availability across HELIX Producer More Information: Visit the HELIX products Web site at and Command Line ApplicationsAll versions of HELIX Producer provide two separate applications that you can use to encode output clips or live broadcasts: Graphical Application The graphical application provides an easy-to-use interface for selecting inputs and setting up outputs. HELIX Producer saves your encoding options in an XML-based job file that can be reused, modified, or run from the command line. RealAudio and RealVideo outputyes yesyes AAC and AAC+ codecyes yes noEAAC+ codecnononoAMR-NB and AMR-WB codecyes CODEC SUPPORT (profiles 0 and 3)yes yes CODEC (Baseline, Main, and High profiles)yes yes noMPEG-4 Part 2 CODEC SUPPORT (Simple and Advanced Simple profiles)yes yes noHelix Producer Output Format and CODEC SUPPORT Format or CodecHelix Mobile Producer HELIX ProducerRealProducer (Table Page 2 of 2) HELIX Producer Feature Availability FeatureHelix Mobile Producer HELIX ProducerRealProducergraphical applicationyes yes yes command-line applicationyes yes yes file input (compressed and uncompressed)