QuickTime 4 Reference

New Features of Sequence Grabber Components

Sequence grabber components now allow you to assign a specific file to each channel. This allows you to collect data into more than one file at a time, which can result in improved performance by defining the files for different channels on different devices. These destination containers are referred to as sequence grabber outputs. See "Working with Sequence Grabber Outputs" for a complete discussion.

Sequence grabber components now use data handler components when writing movie data. This provides greater flexibility, especially when working with special storage devices such as networks.

As discussed in Chapter 1, "Movie Toolbox," QuickTime 2.0 introduced timecode tracks to QuickTime movies. The sequence grabber automatically creates a timecode track if the video digitizer component contains timecode information. To support timecode tracks, the sequence grabber also provides two functions that let you identify the source information associated with video data that contains timecode information. For more information about timecodes and the timecode media handler, see Chapter 1, "Movie Toolbox."

Improved Support for Digitizing Video in Windows

Storing Captured Data in Multiple Files