The J2ME record management system

   The J2ME record management system (RMS) provides a mechanism through which MIDlets can persistently store data and retrieve it later. In a record-oriented approach, J2ME RMS comprises multiple record stores. An overview of J2ME RMS and MIDlet interfacing is given in Figure 1.

Figure 1. Overview of J2ME RMS and MIDlet interfacing

App Store Tip

App Store Tip: Delivering Video to Your iPhone App

HTTP Live Streaming provides a state-of-the-art standards-based solution for streaming video over wireless networks. A key benefit of HTTP Live Streaming is the ability to dynamically adjust to varying network bandwidth conditions. It can store multiple video clips of different quality on a server, and then deliver the one that matches what the customer is capable of viewing on the network they are
currently accessing.

Your application must use the HTTP Live Streaming protocol if it uses the cellular network to deliver video for any stream with a duration of 10 minutes or more. In addition, applications using HTTP Live Streaming over the cellular network must include a low quality stream of no more than 64 Kbps for your app to resort to when network conditions demand it.

To learn more about using HTTP Streaming, read HTTP Live Streaming Overview in the iPhone Reference Library.

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HTTP Live Streaming in iOS

HTTP Live Streaming is a streaming standard proposed by Apple. See draft 5.
Files involved are

• .m4a for audio (if you want a stream of audio only).
• .ts for video. This is a MPEG-2 transport, usually with a h.264/AAC payload. It contains 10 seconds of video and it is created by splitting your original video file, or by converting live video.
• .m3u8 for the playlist. This is a UTF-8 version of the WinAmp format.