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TrFile_GetMetaData |
Gets metadata out of an image, movie or pdf. Metadata can be inserted by for example Photoshop and can contain a description of the image, copyright information, camera information, etc.
Syntax
TrFile_GetMetaData ( switches ; source )
Parameters
| switches | these determine the metadata that is returned |
| source | the path to the file, or container data |
Switches
Switches can be one or more of the following:
| -GetIPTC | get the IPTC metadata (Photoshop’s File Info) |
| -GetXMP | get XMP metadata (Adobe’s Extensible Metadata Platform ) |
| -GetExif | get the Exif metadata (a standard for digital cameras) |
| -GetRawExif | get the Exif metadata (a standard for digital cameras), in a more original form |
| -GetGPS | get the GPS (Global Positioning System) metadata, with the image coordinates |
| -GetJPEGComment | get the JPEG comment metadata of a JPEG file |
| -GetImageURL | get the URL metadata (Photoshop’s File Info extension) |
| -GetImageDescription | get a description like width, height and depth, resolution, codec name etc. |
To specify the encoding you can use:
| -SourceMacCharSet | the IPTC data has Mac encoded characters |
| -SourceWinCharSet | the IPTC data has Windows encoded characters |
| -SourceUTF8CharSet | the IPTC data will be read as UTF-8 encoded |
| -DontUseAutoUTF8Detection | disable the automatic detection of UTF-8 encoding |
For movies these switches can be used:
| -IsValidMovie | returns 1 (true) if this is a valid movie or 0 (false) otherwise |
| -GetMovieDescription | get a description like width, height and depth, timecode, frames per second, codec name etc. |
You can add this switch in combination with the switch “-GetMovieDescription”:
| -AddFrameCount | the frame count of the movie is added to the result. Note that it might take a while to calculate the frame count. |
For movies you can also get these single metadata values:
| -GetMovieDuration | get the duration in seconds of a movie |
| -GetTimecodeBegin | get the begin Timecode of a movie |
| -GetTimecodeEnd | get the end Timecode of a movie |
| -GetTimecodeCurrent | get the current Timecode of a movie |
| -GetMovieMetadata | get all embedded metadata, for example Artist or Description |
| -GetMovieCreationDate | gets the creation date (incl. time + timezone) of the movie |
| -GetMovieWidth | get the width of the movie |
| -GetMovieHeight | get the height of the movie |
| -GetMovieRotation | get the rotation in degrees of the movie |
| -GetMovieFrameCount | get the total number of frames in the movie |
| -GetMovieSoftware | get the name if the application that created the movie |
| -GetMovieYear | get the year of the movie |
| -GetMovieGPS | gets the GPS location data of the movie |
With an extra -Format switch you can specify how the movie GPS location is returned:
| -Format=Decimal | (default) format the GPS using decimal coordinates |
| -Format=DegMinSecs | format the GPS using latitude, longitude (in degrees, minutes and seconds) and height (in meters) |
| -Format=ISO6709 | format the GPS using according to ISO 6709 |
If there is no Timecode track or GPS or creation data an empty string is returned.
For backwards compatibility you can use this switch:
| -GetMovieDescriptionOldFormat | returns the original result of "-GetMovieDescription", i.e. height returned first and not reflecting the rotation of the movie. |
To get ICC Profile information use these switches:
| -GetIccProfileName | returns the name of the embedded ICC Color Profile for example "sRGB IEC61966-2.1" |
| -GetLocalizedIcc ProfileName | returns the localized name of the embedded ICC Color Profile in the JPEG. Based on the user language settings it will return the ICC name that best matches the user language. For example for an Italian user it can return "Profilo RGB generico". |
| -GetIccProfileDescription | returns a text description of the embedded ICC Color Profile. The result is formatted as a list. You can also add the switch "-Format=XML" to get the result in XML format, with the XML tags colored blue. |
You can also add the switch:
| -DontAddStyle | the result will be in plain text. |
For PDFs this switch can be used:
| -GetPDFDescription | get metadata of a PDF file, such as the document’s title, author, and creation date |
Returned Result
Data type returned
Text
Result
the requested metadata, if available.
Returned error codes can be:
| $$-2026 | userDataItemNotFound | the requested metadata is not available |
| $$-43 | fnfErr | source file not found |
| $$-50 | paramErr | parameter error |
Other errors may be returned.
Originated in
Troi File Plug-in 2.0
Compatibility
FileMaker Pro 16 to 19
Considerations
Prior to Troi File 9.0 this function was called TrFile_MetaData.
Starting with version 12.1: you can use a container (or a variable with container data) as the source.
Starting with version 9.1: you can also use -GetXMP with movies that contain XMP. Version 9.1 also added the switches -GetMovieMetadata, -GetMovieCreationDate and -GetMovieGPS.
Note that some metadata is returned in a raw form. See the example files “IPTC_XMP_Metadata” and GetEXIF” for information on how to parse this.
Exif (Exchangeable image file) metadata in an image file will contain annotation data such as the time a photo was created, aperture and shutter speed. Your digital camera needs to have put this in the file.
From v6.0: When using the switch “-GetIPTC” the plug-in can now automatically detect if the text is UTF-8 encoded (and also returns with the metadata text correctly formatted). If UTF-8 format is detected it will override the switches: “-SourceMacCharSet” and “-SourceWinCharSet”.
IPTC data in image files can also be either Mac or Windows encoded . With the switches “-SourceMacCharSet” and “-SourceWinCharSet” you can manually tell the plug-in which character encoding you expect in the image files. Alternatively you can retrieve both encodings and then see which is best. Note: If you don’t specify a CharSet switch, the plug-in uses the encoding of the platform it is running on.
Version 5.5 added getting Exif from RAW files. v4.5 added the -GetRawExif switch: this will return the Exif data in a more original form, as fractions. For example aperture will be returned as 95/32, instead of 2.96875. This makes it possible to write Exif data back in the original form, with the TrFile_SetMetaData function.
v13.0 added these switches:
-GetMovieWidth
-GetMovieHeight
-GetMovieRotation
-GetMovieFrameCount
-GetMovieSoftware
-GetMovieYear
-IsValidMovie
-AddFrameCount
v14.0 added these switches:
-GetIccProfileName
-GetLocalizedIccProfileName
-GetIccProfileDescription
-DontAddStyle
Example
Set Field [ result ; TrFile_GetMetaData ( "-GetExif " ; "C:\myData\Photo1.jpg" ) ]This will return the raw EXIF data. The data will look like this:
##EXIF 270
OLYMPUS DIGITAL CAMERA
##END 270
##EXIF 306
2011:06:09 10:50:40
##END 306
…
Example 2
Set Field [ result ; TrFile_GetMetaData ( "-GetIPTC " ; gFilePath ) ]This will return the raw IPTC data. The data will look like this:
##IPTC 120
FOR IMMEDIATE RELEASE–FILE–Shania Twain performs at the Country Music Association Awards show in Nashville, Tenn., …
##END 120
##IPTC 122
CJC RWP MAH
##END 122
##IPTC 105
SHANIA TWAIN
##END 105
##IPTC 40
FOR IMMEDIATE RELEASE. A SEPT. 22, 1999 FILE PHOTO. DIGITAL IMAGE
##END 40
…
Used in example files
GetExif.fmp12
IPTC_XMP_Metadata.fmp12
SetExif.fmp12
GetMovieMetadata.fmp12
GetICC_Profile.fmp12
Related functions
| TrFile_GetAsPlainText |
| TrFile_GetFileStructure |
| TrFile_SetMetaData |
Related topics
Troi File Plug-in online help (overview)
