QPix Command Reference
![]() |
![]() |
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 |