QPx_GetCompressedPictureInfo

QPx_GetCompressedPictureInfo(pictVar; codecType; compQuality; compDepth):error
pictVar Picture Compressed picture
codecType String4 Codec type
compQuality Longint Compression quality
compDepth Longint Compression depth
error Longint Error result

Returns information about a QuickTime-compressed picture.

Parameter pictVar is the picture for which to return information.

Parameter codecType receives the type of the QuickTime compressor component (codec) that compressed the picture.

Parameter compQuality is set to the compression quality. The compression quality a number in the range of 0 ... 1024. The following constants define commonly used values:

qpx_MinQuality 0 Minimal quality
qpx_LowQuality 256 Low quality
qpx_NormalQuality 512 Normal quality
qpx_HighQuality 768 High quality
qpx_MaxQuality 1023 Maximum quality
qpx_LosslessQuality 1024 Lossless quality

Parameter compDepth receives the depth at which the picture was compressed. Possible values for compDepth are:

qpx_BlackAndWhite 1 Black and white
qpx_FourColors 2 Four colors
qpx_SixteenColors 4 Sixteen colors
qpx_TwoHundredFiftySixColors 8 256 colors
qpx_ThousandsColors 16 Thousands of colors
qpx_MillionColors 24 Million of colors
qpx_MillionColorsPlusAlpha 32 Million of colors plus alpha
qpx_FourGrays 34 Four grays
qpx_SixteenGrays 36 Sixteen grays
qpx_TwoHundredFiftySixGrays 40 256 grays

If pictVar is not a compressed picture, codecType is set to an empty string and compQuality and compDepth are set to zero.

Related commands

QPx_CompressPicture Compresses a picture variable
QPx_GetPictureInfo Returns the properties of a 4D picture variable

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