QuickTime 3 Reference

DV Movie Import Component

The DV movie import component converts a file containing DV video data into a QuickTime movie. The input file must be a Mac OS file of type `dvc!' or a Microsoft Windows file with the.dvc file extension. The output file contains a QuickTime movie with two tracks:

A video track whose samples are of type kDVNTSCCodecType for NTSC video data or kDVCPALCodecType for PAL video data.
A sound track whose samples are of type kDVAudioFormat .

The data is converted in place, as described in "Importing In Place" , and the import operation typically takes less than a second. Because both tracks in the QuickTime file refer to the same data, flattening the file creates a file that is twice the size of the original DV data.

You can perform the same operations on the resulting QuickTime movie, including play back, editing, and stepping, that you can for other QuickTime movies. Because video and audio are interleaved in the underlying data, applications for editing movies should make it possible to create a separate file that contains only the audio data for the movie. This can be done by calling the ConvertMovieToFile function and specifying kQTFileTypeAIFF as the destination file format.