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QuickTime 4 Reference

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Depth

Some image file formats support more than one pixel depth.

In QuickTime 4, the BMP, JPEG, Photoshop, PNG, PICT, QuickTime Image, Targa and TIFF graphics exporters support the depth setting.

Note that the usual QuickDraw conventions for bit depths apply:

• 24 means "Millions of Colors"
• 32 means "Millions+", meaning millions of colors plus an alpha channel
• 40 means 8-bit grayscale.

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