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Appendix B: Production Tasks

Intended for beginning and intermediate users, this appendix addresses specific production questions by referring you to the appropriate section in this guide. If you have questions about a specific tag or attribute, you may find later appendixes more helpful.

Streaming Media Concepts

Chapter 2 introduces you to basic concepts and techniques for producing streaming media presentations.

Streaming Media Concepts
Question Answer
How do RealOne Player's three playback panes interact? click here
What can I use RealOne Player's related info pane to do? click here
What sets the related info pane's height and width? click here
How do I use my streaming clips to open HTML pages? click here
How do I use my HTML pages to control my clips? click here
Which types of streaming clips can RealOne Player play? click here
What does RealOne Player's autoupdate feature do? click here
How do I ensure backwards compatibility with earlier RealPlayers? click here
Does RealOne Player cache my copyrighted clips? click here
How do I reach audiences that have different connection speeds? click here
How much data can I stream to a modem or a fast connection? click here
What are buffering and preroll? click here
How do I plan my presentation's timeline? click here

RealAudio Clips

Refer to Chapter 3 to learn about the RealAudio streaming format. Your user's guide or online help for Helix Producer explains how to use that tool to encode RealAudio clips.

RealAudio Clips
Question Answer
What is "lossy" compression? click here
How much bandwidth does RealAudio use? click here
What is a codec? click here
When should I use SureStream RealAudio? click here
What is the best sampling rate for an audio clip converted to RealAudio? click here
Does RealAudio offer stereo encoding? click here
How do I get the best quality sound? click here
What media should I use to record audio that I plan to stream? click here
What sampling rates can I use for audio input? click here
How do I optimize my source audio? click here
What uncompressed audio file formats can I turn into RealAudio clips? click here

RealVideo Clips

Chapter 4 explains RealVideo characteristics. See the user's guide or online help for Helix Producer for instructions on encoding RealVideo clips.

RealVideo Clips
Question Answer
How does a RealVideo clip encode the video's soundtrack? click here
How many frames per second does a RealVideo clip display? click here
What frame rate should I use when I capture my video source? click here
Can I deliver high frame rates to computers with slow processors? click here
What width and height dimensions should I use for my RealVideo clip? click here
What dimensions should I use when capturing my source video? click here
Which RealVideo codec should I choose when encoding my video? click here
How do I ensure that my video's visual appearance is good? click here
How do I keep a RealVideo clip from appearing distorted? click here
Which uncompressed video file formats can I turn into RealVideo clips? click here
What streaming speeds does a RealVideo clip use? click here
When should I use variable bit rate encoding? click here

Flash Clips

If you produce Macromedia Flash animations, Chapter 5 explains how to optimize your Flash Player clip for streaming.

Flash Clips
Question Answer
What versions of Flash can RealOne Player play? click here
How much bandwidth does a Flash clip use when it streams? click here
What Flash production techniques ensure high-quality streaming? click here
How do I combine Flash with a RealAudio soundtrack? click here
Can I use Flash timeline commands such as Play, Stop, and Go To? click here
Can I use Flash commands to control RealOne Player? click here
Can I use Load Movie to import a second clip into my main clip? click here
Does a streaming Flash presentation support secure transactions? click here
How do I prepare my Flash Player clip for streaming? click here

RealText Markup

Chapter 6 explains the RealText markup for creating timed text. Appendix E provides a quick reference for RealText tags and attributes.

RealText Markup
Question Answer
What languages does RealText support? click here
How much bandwidth does RealText need? click here
How do I make text scroll up, or move from right to left? click here
Can I create a transparent RealText background? click here
How do I specify how long a RealText clip lasts? click here
How do I control when and where text appears in the RealText window? click here
Can I erase all the text in the RealText window at some point? click here
What fonts and font sizes can I use? click here
Can I use HTML-type tags, such as <b> and <p>? click here
How do I center text in the window? click here
Can I link RealText to an HTML page or media clip? click here
How do I use RealText hyperlinks to control playback in RealOne Player? click here

RealPix Markup

See Chapter 7 for instructions on creating a RealPix slideshow from still images. Appendix F summarizes RealPix tags and attributes.

RealPix Markup
Question Answer
Should I use RealPix or SMIL 2.0 to create slideshows? click here
What types of images can I use in a RealPix slideshow? click here
Can I control how GIFs animate within a slideshow? click here
Does RealPix support image transparency? click here
How large can the file sizes for my slideshow images be? click here
Where do I specify the RealPix display window dimensions? click here
How do I control how much bandwidth RealPix uses? click here
Can my slideshow use images on different servers? click here
Can I deliver a RealPix slideshow with a Web server? click here
How do I create effects such as fades and wipes? click here
How do I zoom in on an image, or pan around a large image? click here
Can I show only part of an image, or display two images at once? click here

Basic SMIL Questions

Chapter 8 explains the basics of using SMIL 2.0 in a RealOne Player presentation.

Basic SMIL 2.0 Issues
Question Answer
Why should I use SMIL? click here
What versions of RealPlayer can play SMIL 2.0 presentations? click here
Besides more features, are there differences between SMIL 1.0 and 2.0? click here
How do I update my SMIL 1.0 presentation to SMIL 2.0? click here
Where can I get the SMIL 2.0 specification? click here
Will my presentation work with other SMIL-based players? click here
How do I write a SMIL file? click here
Is a closing slash always necessary with a SMIL tag? click here
How do I add comments to a SMIL file? click here
What values can I use for the ID in a SMIL tag? click here
What is the rn: prefix I see in some SMIL attributes? click here
How can I view the SMIL file for a streaming presentation? click here

Clips and URLs

Chapter 9 is your primary resource for learning about clip source tags and URLs. Chapter 21 contains information about servers and streaming protocols.

Clips and URLs
Question Answer
How do I introduce a clip, such as a video, into a presentation? click here
Should a clip source tag have an ID? click here
How do I set an image clip's streaming speed? click here
Can I treat a SMIL or Ram file like a clip and use it in another SMIL file? click here
What URLs should I use in my SMIL file as I develop it? click here
How do I move my clips from my desktop computer to a server? click here
When I stream my clips, do they all need to have individual URLs? click here
What is Real Time Streaming Protocol (RTSP)? click here
How do I write an RTSP URL? click here
How do I write an HTTP URL? click here
Does RealOne Player cache files like a Web browser? click here
What is the CHTTP protocol? click here

Colors and Transparency

SMIL and RealNetworks' SMIL customizations give you many ways to add color to your presentation, as well as to modify the colors in existing clips to create transparency or partial transparency.

Colors and Transparency
Question Answer
What color values does SMIL accept? click here
How do I add a background color to a region that plays a clip? click here
How do I make the background color appear only when the clip plays? click here
Can I make the region background color partially transparent? click here
Can I change a region background color when a clip starts? click here
Can I change the region background color while a clip plays? click here
How do I turn an entire clip partially transparent? click here
How can I make a clip's opaque background transparent, or vice versa? click here
Can I turn a range of colors in a clip transparent? click here
Can I substitute a certain color for a clip's transparent background? click here
Can I make a clip become more (or less) transparent as it plays? click here
Can I create a solid block of color other than a region background color? click here

Layouts

Chapter 12 explains how to lay out clips in the RealOne Player media playback pane.

Layouts
Question Answer
Where in the SMIL file do I define the layout? click here
Is a SMIL region like an HTML frame? click here
How do I set my presentation's overall size? click here
Can I make a clip play in a separate window? click here
How do a define the size of the region in which a clip plays? click here
How do I specify which clips play in which regions? click here
Can I play one clip in front of another? click here
How do I put a logo in front of my video? click here
How do I center a clip in a region? click here
How can I make my clip scale up or down to fit the region? click here
Can I make the same clip display in more than one region? click here

Basic Timing and Groups

Refer to Chapter 13 for basic information about timing presentations. Chapter 11 explains how to organize clips into groups.

Basic Timing and Groups
Question Answer
How do I make clips play one after another? click here
How do I play several clips at the same time? click here
Can I make an entire group of clips stop when one of the clips finishes? click here
How do I let the viewer select which clip to play? click here
How do I create a clip preview? click here
Can I make a clip repeat? click here
How do I specify how long an image clip displays? click here
Can I make a clip play indefinitely? click here
Can I use timing values with groups as well as clips? click here
How do I make a clip freeze on screen after it stops playing? click here
How do I make a clip display throughout the presentation? click here
How do I delay when a clip starts playing? click here

Advanced Timing

Chapter 14 explains the advanced timing features, which build on the basic timing features described in Chapter 13.

Advanced Timing
Question Answer
Can I start or stop an element when any one of multiple events occur? click here
How do I start or stop a clip when a clip in another group starts or stops? click here
Can I start or stop a clip when another clip repeats? click here
How do I start or stop a clip when the viewer clicks an icon? click here
How can I coordinate all clips with a broadcast? click here
Can I prevent a clip from restarting? click here
Can I create an effect similar to a Javascript rollover? click here
How do I launch a clip on a keystroke? click here

Hyperlinks

Chapter 15 explains how to create hyperlinks in a SMIL presentation.

Hyperlinks
Question Answer
How do I create an image map over a clip? click here
Can a SMIL link have an alt value? click here
How do I open a link with a keystroke? click here
How do I link my SMIL presentation to a Web page? click here
Can I open a link in a browser frame? click here
How do I open an HTML page in the related info pane? click here
Does RealOne Player pause when a Web page opens? click here
How do I open a link automatically? click here
How do I link my SMIL file to another streaming presentation? click here
Can I open a linked clip or SMIL presentation in a new window? click here
Can RealText include hyperlinks, too? click here

Special Effects

Chapter 16 and Chapter 17 explain transition effects and SMIL animations, respectively, the two features that allow you to create special effects with clips.

Special Effects
Question Answer
How do I introduce a new clip with a transition effect? click here
Can I control how long a transition effect takes to complete? click here
How do I keep a clip visible long enough for a transition effect to occur? click here
Can I stop a transition effect before it completes? click here
How do I fade a clip to or from a solid color? click here
How do I fade a video into the next video? click here
Can I fade the volume of an audio clip up or down? click here
How do I select what clip and property I want to animate? click here
How do I make a clip grow or shrink? click here
How do I move a clip around the screen? click here
How do I animate colors? click here
How do I make an animation flow smoothly? click here

Advanced Streaming

Chapter 18 and Chapter 19 cover switching and prefetching, respectively, two advanced features that allow you to stream different clips to different viewers, and maintain greater control over bandwidth use.

Advanced Streaming
Question Answer
How do I deliver different clips to different viewers? click here
Do I always have to use a <switch> tag when I present multiple choices? click here
What attributes can RealOne Player evaluate when choosing a clip? click here
Can RealOne Player evaluate more than one attribute at a time? click here
How do I deliver clips in different languages to different viewers? click here
How do I stream clips at different bandwidths to different viewers? click here
Can I add captions and audio descriptions to aid viewer accessibility? click here
How do I deliver different clips to Windows, Macintosh, and Linux users? click here
Can I use a <switch> tag to stream different sizes of videos? click here
How do I stream clip data to RealOne Player before the clip plays? click here
How much bandwidth can I use for prefetching clip data? click here
How much clip data can I stream in advance of clip playback? click here

Web Page Embedding

See Chapter 20 for information on embedding your streaming presentation directly in a Web page.

Web Page Embedding
Question Answer
Will an <EMBED> tag work with Microsoft Internet Explorer? click here
How do I use both <OBJECT> and <EMBED> tags? click here
What is RealOne Player's ActiveX Class ID? click here
What is a .rpm file? click here
How do I set my presentation's size in my Web page? click here
How do I add RealOne Player controls to my Web page? click here
How do I make all the controls work together? click here
Can I center my clip in an HTML table? click here
Can I make my presentation start as soon as the Web page loads? click here
How do I set shuffle play? click here
How do I lay out my SMIL presentation in my Web page? click here
Can I use Javascript or VBScript to control my embedded presentation? click here

Presentation Delivery

Refer to Chapter 21 for instructions on delivering your presentation from Helix Universal Server or a Web server. That chapter also explains how to link your presentation to your Web page.

Presentation Delivery
Question Answer
What is a Ram file? click here
How do I write a Ram file? click here
What URLs do I use in a Ram file? click here
Why does Helix Universal Server use RTSP? click here
How do I link my Web page to my clips through the Ram file? click here
Can I use the Ram file to open HTML pages in RealOne Player? click here
How do I open my streaming clip at double-size or full-screen? click here
How do I use Ramgen so that I don't need a Ram file? click here
What MIME types do I need to set on a Web server? click here
Can a Web server perform all the functions of Helix Universal Server? click here
How can I advertise my presentation? click here
Where do I get a download logo for RealOne Player? click here


RealNetworks, Inc. ©2002 RealNetworks, Inc. All rights reserved.
For more information, visit RealNetworks
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