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HTML5: Video and Audio in Depth
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iOS 3 issues


From:

HTML5: Video and Audio in Depth

with Steve Heffernan

Video: iOS 3 issues

iOS 3 is the version of Apple's iDevice software that shipped with the first iPad, the iPhone 3, 3GS and iPod Touches from the same time period. So despite the option to upgrade to iOS 4, there are still a lot of users out there that have this version. The first issue is with the poster attribute. If you include a poster attribute at all, it can cause the video on iOS 3 devices to break. If you see this happening and want to support your iOS 3 users, you can simply remove the poster attribute. That's not really ideal, but it's an easy way around it.
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  1. 1m 24s
    1. Welcome
      42s
    2. Using the exercise files
      42s
  2. 15m 18s
    1. Understanding HTML5 video and audio
      4m 46s
    2. The state of HTML5 video and audio
      4m 29s
    3. Understanding the format war
      3m 53s
    4. Configuring your server to deliver HTML5 media formats
      2m 10s
  3. 32m 36s
    1. Using the video and audio tags
      5m 34s
    2. Using multiple sources for browser compatibility
      5m 53s
    3. Preloading
      4m 16s
    4. Autoplaying
      2m 2s
    5. Looping
      5m 11s
    6. Setting a poster frame
      3m 43s
    7. Setting the video width and height
      3m 40s
    8. Displaying subtitles and captions
      2m 17s
  4. 12m 40s
    1. Falling back to Flash
      4m 4s
    2. Falling back to download links
      6m 21s
    3. Using an embed code builder
      2m 15s
  5. 22m 17s
    1. Understanding HTML5 video formats
      5m 10s
    2. Understanding HTML5 audio formats
      2m 57s
    3. Encoding MP4/H.264 video with HandBrake
      3m 13s
    4. Encoding Ogg, Theora, and WebM with Firefogg
      3m 18s
    5. Encoding audio formats with VLC
      5m 54s
    6. Automating video and audio encoding
      1m 45s
  6. 34m 59s
    1. Setting up the JavaScript
      4m 39s
    2. Creating Play and Pause buttons
      7m 52s
    3. Creating a Play Progress bar
      5m 49s
    4. Creating a Load Progress bar
      9m 29s
    5. Creating a Current Time and Duration display
      7m 10s
  7. 4m 37s
    1. Overview of known issues
      35s
    2. Autobuffer or preload?
      56s
    3. Load progress in Firefox 3.6
      41s
    4. Android 2.0 issues
      1m 5s
    5. iOS 3 issues
      1m 20s
  8. 2m 8s
    1. Flight of the Navigator
      50s
    2. ZEN Audio Player by simurai
      34s
    3. The Wilderness Downtown by Google and Arcade Fire
      44s
  9. 1m 40s
    1. Further exploration
      1m 40s

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HTML5: Video and Audio in Depth
2h 7m Intermediate Jun 02, 2011

Viewers: in countries Watching now:

In this course, author Steve Heffernan contextualizes the state of HTML5 audio and video and shows how to embed media into a web page using HTML5. The course sheds light on configuring the new HTML5 audio and video tags, ensuring backwards compatibility by setting alternative playback methods, encoding the needed file formats, and building custom controls with JavaScript. Also included are tutorials on troubleshooting known issues and reviewing real-world examples of HTML5 audio and video.

Topics include:
  • Understanding the differences in media formats
  • Preloading, autoplaying, and looping in HTML5
  • Setting a video's width and height attributes
  • Displaying subtitles and captions
  • Generating embed code with an embed code builder
  • Encoding files using HandBrake, Firefogg, and VLC
  • Creating a load progress bar
  • Recognizing Android and iOS issues
Subjects:
Video Web Web Video Web Development
Software:
HTML
Author:
Steve Heffernan

iOS 3 issues

iOS 3 is the version of Apple's iDevice software that shipped with the first iPad, the iPhone 3, 3GS and iPod Touches from the same time period. So despite the option to upgrade to iOS 4, there are still a lot of users out there that have this version. The first issue is with the poster attribute. If you include a poster attribute at all, it can cause the video on iOS 3 devices to break. If you see this happening and want to support your iOS 3 users, you can simply remove the poster attribute. That's not really ideal, but it's an easy way around it.

In this case you could splice in the poster frame as the first frame of the video so the poster still shows when you're preloading the video. It's a little extra work, but that's how you can get around it if you encounter this issue. Another issue is a very interesting one, having to do with including JavaScript on page include. If you include JavaScript in the header of a page, just like we did with jQuery, it can cause video on the iPad to break. If you move that same JavaScript to the end of the file to right before the body tag, the iPad will work, but it can cause video on the iPhone to break.

It's a super weird bug and seems to be caused by some issue where the software can't handle loading both the JavaScript and the video at the same time. Both of these issues are thankfully fixed in iOS 4. So hopefully users will upgrade to this version quickly.

There are currently no FAQs about HTML5: Video and Audio in Depth.

 
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