## Composite Tags

The values of the composite tags are Derived From the values of other tags. These are convenience tags which are calculated after all other information is extracted. Only a few of these tags are writable directly, the others are changed by writing the corresponding Derived From tags. User-defined Composite tags, also useful for custom-formatting of tag values, may created via the ExifTool configuration file.

> Tag Name | Writable | Derived From | Values / Notes
> --- | --- | --- | ---
> AdvancedSceneMode | no | Model SceneMode AdvancedSceneType | --> Panasonic AdvancedSceneMode Values
> Aperture | no | FNumber ApertureValue |
> AudioBitrate | no | MPEG:MPEGAudioVersion MPEG:SampleRate MPEG:VBRBytes MPEG:VBRFrames | (calculated for variable-bitrate MPEG audio)
> AutoFocus | no | Nikon:PhaseDetectAF Nikon:ContrastDetectAF | 0 = Off 1 = On
> AvgBitrate | no | QuickTime::MovieDataSize QuickTime::Duration |
> BlueBalance | no | WB_RGGBLevels WB_RGBGLevels WB_RBGGLevels WB_GRBGLevels WB_GRGBLevels WB_GBRGLevels WB_RGBLevels WB_GRBLevels WB_RBLevels WBBlueLevel WBGreenLevel |
> CDDBDiscPlayTime | no | CDDB1Info |
> CDDBDiscTracks | no | CDDB1Info |
> CFAPattern | no | CFARepeatPatternDim CFAPattern2 |
> CircleOfConfusion | no | ScaleFactor35efl | (calculated as D/1440, where D is the focal plane diagonal in mm. This value may be incorrect if the image has been resized)
> ConditionalFEC | no | FlashExposureComp FlashBits |
> DOF | no | FocalLength Aperture CircleOfConfusion FocusDistance SubjectDistance ObjectDistance ApproximateFocusDistance FocusDistanceLower FocusDistanceUpper | (this value may be incorrect if the image has been resized)
> DateCreated | no | Kodak:YearCreated Kodak:MonthDayCreated |
> DateTimeCreated | no | IPTC:DateCreated IPTC:TimeCreated |
> DateTimeOriginal | no | DateTimeCreated DateCreated TimeCreated |
> DateTimeOriginal | no | ID3:RecordingTime ID3:Year ID3:Date ID3:Time |
> DigitalCreationDateTime | no | IPTC:DigitalCreationDate IPTC:DigitalCreationTime |
> DigitalZoom | no | Canon:ZoomSourceWidth Canon:ZoomTargetWidth Canon:DigitalZoom |
> DriveMode | no | ContinuousDrive SelfTimer | 0 = Continuous Shooting 1 = Self-timer Operation 2 = Single-frame Shooting
> Duration | no | FLAC:SampleRate FLAC:TotalSamples |
> Duration | no | Vorbis:NominalBitrate FileSize |
> Duration | no | APE:SampleRate APE:TotalFrames APE:BlocksPerFrame APE:FinalFrameBlocks |
> Duration | no | FileSize ID3Size MPEG:AudioBitrate MPEG:VideoBitrate MPEG:VBRFrames MPEG:SampleRate MPEG:MPEGAudioVersion |
> Duration | no | RIFF:FrameRate RIFF:FrameCount VideoFrameRate VideoFrameCount |
> Duration | no | RIFF:AvgBytesPerSec FileSize FrameCount VideoFrameCount |
> Duration | no | AIFF:SampleRate AIFF:NumSampleFrames |
> ExtenderStatus | no | Olympus:Extender Olympus:LensType MaxApertureValue | (Olympus cameras have the quirk that they may retain the extender settings after the extender is removed until the camera is powered off. This tag is an attempt to represent the actual status of the extender.) 0 = Not attached 1 = Attached 2 = Removed
> FOV | no | FocalLength ScaleFactor35efl FocusDistance | (calculated for the long image dimension. This value may be incorrect for fisheye lenses, or if the image has been resized)
> FileNumber | yes | DirectoryIndex FileIndex |
> Flash | yes | XMP:FlashFired XMP:FlashReturn XMP:FlashMode XMP:FlashFunction XMP:FlashRedEyeMode XMP:Flash | --> EXIF Flash Values (facilitates copying camera flash information between XMP and EXIF)
> FlashType | no | FlashBits | (may report "Built-in Flash" for some Canon cameras with external flash in manual mode) 0 = Built-In Flash 1 = External
> FocalLength35efl | no | FocalLength ScaleFactor35efl | (this value may be incorrect if the image has been resized)
> FocusDistance | no | Sony:FocusPosition FocalLength | (distance in metres = FocusPosition * FocalLength / 1000)
> FocusDistance2 | no | Sony:FocusPosition2 FocalLengthIn35mmFormat |
> GPSAltitude | no | GPS:GPSAltitude GPS:GPSAltitudeRef XMP:GPSAltitude XMP:GPSAltitudeRef |
> GPSAltitude | no | QuickTime:GPSCoordinates |
> GPSAltitude | no | QuickTime:LocationInformation |
> GPSAltitudeRef | no | QuickTime:GPSCoordinates | 0 = Above Sea Level 1 = Below Sea Level
> GPSAltitudeRef | no | QuickTime:LocationInformation | 0 = Above Sea Level 1 = Below Sea Level
> GPSDateTime | no | GPS:GPSDateStamp GPS:GPSTimeStamp |
> GPSLatitude | no | GPS:GPSLatitude GPS:GPSLatitudeRef |
> GPSLatitude | no | QuickTime:GPSCoordinates |
> GPSLatitude | no | QuickTime:LocationInformation |
> GPSLatitudeRef | no | XMP:GPSLatitude | 'N' = North 'S' = South
> GPSLongitude | no | GPS:GPSLongitude GPS:GPSLongitudeRef |
> GPSLongitude | no | QuickTime:GPSCoordinates |
> GPSLongitude | no | QuickTime:LocationInformation |
> GPSLongitudeRef | no | XMP:GPSLongitude | 'E' = East 'W' = West
> GPSPosition | no | GPSLatitude GPSLongitude |
> HyperfocalDistance | no | FocalLength Aperture CircleOfConfusion | (this value may be incorrect if the image has been resized)
> IDCPreviewImage | no | IDCPreviewStart IDCPreviewLength |
> ISO | no | Canon:CameraISO Canon:BaseISO Canon:AutoISO | (use CameraISO if numerical, otherwise calculate as BaseISO * AutoISO / 100)
> ImageHeight | no | Main:PostScript:ImageData PostScript:BoundingBox |
> ImageHeight | no | IFD0:SensorTopBorder IFD0:SensorBottomBorder |
> ImageSize | no | ImageWidth ImageHeight ExifImageWidth ExifImageHeight |
> ImageWidth | no | Main:PostScript:ImageData PostScript:BoundingBox |
> ImageWidth | no | IFD0:SensorLeftBorder IFD0:SensorRightBorder |
> JpgFromRaw | yes | JpgFromRawStart JpgFromRawLength | (this tag is writable, and may be used to update existing embedded images, but not create or delete them)
> Lens | no | Canon:MinFocalLength Canon:MaxFocalLength |
> Lens35efl | no | Canon:MinFocalLength Canon:MaxFocalLength Lens ScaleFactor35efl |
> LensID | no | LensType FocalLength MaxAperture MaxApertureValue MinFocalLength MaxFocalLength LensModel LensFocalRange LensSpec LensType2 LensFocalLength | (attempt to identify the actual lens from all lenses with a given LensType. Applies only to LensType values with a lookup table. May be configured by adding user-defined lenses)
> LensID | no | XMP-aux:LensID Make LensInfo FocalLength LensModel MaxApertureValue | (attempt to convert numerical XMP-aux:LensID stored by Adobe applications)
> LensID | no | Nikon:LensIDNumber LensFStops MinFocalLength MaxFocalLength MaxApertureAtMinFocal MaxApertureAtMaxFocal MCUVersion Nikon:LensType | --> Nikon LensID Values
> LensID | no | Ricoh:LensFirmware | --> Ricoh LensID Values
> LensSpec | no | Nikon:Lens Nikon:LensType |
> LightValue | no | Aperture ShutterSpeed ISO | (calculated LV = 2 * log2(Aperture) - log2(ShutterSpeed) - log2(ISO/100); similar to exposure value but normalized to ISO 100)
> MPImage | no | MPImageStart MPImageLength MPImageType | (the first MPF "Large Thumbnail" is extracted as PreviewImage, and the rest of the embedded MPF images are extracted as MPImage#. The ExtractEmbedded option may be used to extract information from these embedded images.)
> Megapixels | no | ImageSize |
> OriginalDecisionData | yes! | OriginalDecisionDataOffset |
> OtherImage | yes | OtherImageStart OtherImageLength | (this tag is writable, and may be used to update existing embedded images, but not create or delete them)
> PeakSpectralSensitivity | no | FLIR:PlanckB |
> PreviewImage | yes | PreviewImageStart PreviewImageLength PreviewImageValid PreviewImageStart (1) PreviewImageLength (1) | (this tag is writable, and may be used to update existing embedded images, but not create or delete them)
> PreviewImage | no | ScreenNail |
> PreviewImageSize | no | PreviewImageWidth PreviewImageHeight |
> RedBalance | no | WB_RGGBLevels WB_RGBGLevels WB_RBGGLevels WB_GRBGLevels WB_GRGBLevels WB_GBRGLevels WB_RGBLevels WB_GRBLevels WB_RBLevels WBRedLevel WBGreenLevel |
> RedEyeReduction | no | CanonFlashMode FlashBits | 0 = Off 1 = On
> RicohPitch | no | Ricoh:Accelerometer |
> RicohRoll | no | Ricoh:Accelerometer |
> Rotation | no | QuickTime:MatrixStructure QuickTime:HandlerType |
> RunTimeSincePowerUp | no | Apple:RunTimeValue Apple:RunTimeScale |
> ScaleFactor35efl | no | FocalLength FocalLengthIn35mmFormat Composite:DigitalZoom FocalPlaneDiagonal SensorSize FocalPlaneXSize FocalPlaneYSize FocalPlaneResolutionUnit FocalPlaneXResolution FocalPlaneYResolution ExifImageWidth ExifImageHeight CanonImageWidth CanonImageHeight ImageWidth ImageHeight | (this value and any derived values may be incorrect if the image has been resized)
> ShootingMode | no | CanonExposureMode EasyMode BulbDuration |
> ShutterCurtainHack | no | FlashBits ShutterCurtainSync | 0 = 1st-curtain sync 1 = 2nd-curtain sync
> ShutterSpeed | no | ExposureTime ShutterSpeedValue BulbDuration |
> SubSecCreateDate | yes | EXIF:CreateDate SubSecTimeDigitized OffsetTimeDigitized |
> SubSecDateTimeOriginal | yes | EXIF:DateTimeOriginal SubSecTimeOriginal OffsetTimeOriginal |
> SubSecModifyDate | yes | EXIF:ModifyDate SubSecTime OffsetTime |
> ThumbnailImage | yes | ThumbnailOffset ThumbnailLength | (this tag is writable, and may be used to update existing thumbnails, but may only create a thumbnail in IFD1 of certain types of files. Note that for this and other Composite embedded-image tags the family 0 and 1 groups match those of the originating tags)
> ThumbnailTIFF | no | SubfileType Compression ImageWidth ImageHeight BitsPerSample PhotometricInterpretation StripOffsets SamplesPerPixel RowsPerStrip StripByteCounts PlanarConfiguration Orientation |
> VolumeSize | no | ISO:VolumeBlockCount ISO:VolumeBlockSize |
> WB_RGBLevels | no | KDC_IFD:WhiteBalance WB_RGBLevelsAuto WB_RGBLevelsFluorescent WB_RGBLevelsTungsten WB_RGBLevelsDaylight WB_RGBLevels4 WB_RGBLevels5 WB_RGBLevelsShade |
> WB_RGBLevels | no | KodakIFD:WhiteBalance WB_RGBMul0 WB_RGBMul1 WB_RGBMul2 WB_RGBMul3 WB_RGBCoeffs0 WB_RGBCoeffs1 WB_RGBCoeffs2 WB_RGBCoeffs3 KodakIFD:ColorTemperature Kodak:WB_RGBLevels |
> WB_RGGBLevels | no | Canon:WhiteBalance WB_RGGBLevelsAsShot WB_RGGBLevelsAuto WB_RGGBLevelsDaylight WB_RGGBLevelsCloudy WB_RGGBLevelsTungsten WB_RGGBLevelsFluorescent WB_RGGBLevelsFlash WB_RGGBLevelsCustom WB_RGGBLevelsShade WB_RGGBLevelsKelvin |
> WB_RGGBLevels | no | WB_RGGBLevelsUncorrected WB_RGGBLevelsBlack |
> ZoomedPreviewImage | no | ZoomedPreviewStart ZoomedPreviewLength |

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Dec 30, 2016

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