QuickTime 4 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 Windows file with the .dv 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 playback, 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.