QuickTime 4 Reference

DV Image Compressor Component

The DV image compressor component makes it possible to compress QuickTime video data into DV format. It is invoked automatically by the Image Compression Manager when an application requests output of type kDVCNTSCCodecType for NTSC DV data or kDVCPALCodecType for PAL DV data.

When creating NTSC video, the DV image compressor component generates 720 X 480 frames. When creating PAL video, it generates 720 X 576 frames.

Note
Many DV devices use IEEE 1394 (FireWire) serial connections for input/output operations. QuickTime supports compression and decompression of DV data, but it does not include support for FireWire communication. You need additional software to communicate with DV devices.