constrain time from 'start' to 'start + duration'

[jeroen]

This is a more advanced implementation of the start + offset functionality, creating really useful chapter playlists. A couple of requirements on the server are needed:

• The ability to start with an offset time without waiting for the chunk of metadata first
• The ability to stop loading beyond a certain point of the video

mod_h264_streaming and rtmp both offer these functionalities.

[jeroen]

Restricting the start and duration works for all models, except the YoutubeModel.

Here's an overview per model:

• ImageModel: although it's not really useful since images are static).
• HTTPModel: the file is first loaded from the beginning, until metadata is received. Then, a seek() to the startposition is done.
• RTMPModel: the second parameter of the NetStream.play() command is a start position. This is used, so there's no wait for metadata and a dual request (as needed with HTTP).
• SoundModel: surprisingly, Flash sends buffermessages until the chosen startpoint is loaded. Very cool.
• VideoModel: unfortunately, the video starts playing back from the beginning. The controlbar stays at 0 though.
• YoutubeModel: not implemented.