Return Codes

Return Code	Reason
`imNoErr`	Operation has completed without error.
`imTooWide`	File dimensions too large.
`imBadFile`	Bad file format.
	To defer an unsupported subtype to a lower priority importer, return this during `imOpenFile8` or `imGetInfo8`.
`imUnsupported`	Unsupported selector.
`imMemErr`	Memory error.
`imOtherErr`	Unknown error.
`imNoContent`	No audio or video.
`imBadRate`	Bad audio rate.
`imBadCompression`	Bad compression.
`imBadCodec`	Codec not found.
`imNotFlat`	Unflattened QuickTime movie.
`imBadSndComp`	Bad sound compression.
`imNoTimecode`	Timecode supported, but not found.
`imMissingComponent`	Missing component needed to open the file.
`imSaveErr`	Error saving file.
`imDeleteErr`	Error deleting file.
`imNotFoundErr`	The requested metadata chunk was not found.
`imSetFile`	Return this from `imGetPrefs8` only if you are a custom importer and you need Premiere to alter it’s file access information (e.g. a new path or filename is created).
`imIterateStreams`	Return from `imGetInfo8` to indicate that there are more streams to describe.
	Premiere will send `imGetInfo8` for the next stream.
`imBadStreamIndex`	Return from `imGetInfo8` after interating through streams to indicate that there are no more streams to describe.
`imCantTrim`	Return from `imCheckTrim` if the file cannot be trimmed by the importer.
`imDiskFull`	Return from `imTrimFile8` if there is not enough space to complete the trim operation.
`imDiskErr`	Return from `imTrimFile8` if there is a general disk or I/O error during the trim operation.
`imFileShareViolation`	Return from `imOpenFile8` if file cannot be opened due to another process having exclusive read access
`imIterateFrameSizes`	Return from `imGetPreferredFrameSize`, to be called again to describe more frame sizes for a particular pixel format.
`imMediaPending`	Return from `imGetSourceVideo` or `imCreateAsyncImporter` if the importer is still processing the file and cannot return video frames yet.
`imDRMControlled`	Return from `imOpenFile8` if the file cannot be opened because it is under rights management.
`imActivationFailed`	Activation of a component failed (usually due to user cancellation).
	This is used by Premiere Elements.
`imFrameNotFound`	New in CS4. Return if an importer could not find the requested frame (typically used with async importers)
`imBadHeader`	New in CS5. The file cannot be opened because of a header error
`imUnsupportedCompression`	New in CS5. The file has a compression type that the importer does not support
`imFileOpenFailed`	New in CS5. The importer was unable to open the file on disk
`imFileHasNoImportableStreams`	New in CS5. The file has no audio or video stream
`imFileReadFailed`	New in CS5. A read from an open file failed
`imUnsupportedAudioFormat`	New in CS5. The importer cannot import something in the audio format
`imUnsupportedVideoBitDepth`	New in CS5. The video bit depth of this file is unsupported by the importer
`imDecompressionError`	New in CS5. The importer hit an error decompressing the audio or video
`imInvalidPreferences`	New in CS5. Invalid prefs data was passed to the importer
`inFileNotAvailable`	New in CS5. Return from `imQueryContentState` if the file/stream is no longer available because it is offline or deleted
`imRequiresProtectedContent`	New in CS5.5. Return from `imInit` if the importer depends on a library that has not been activated yet.
`imNoCaptions`	New in CC. Return from `imInitiateAsyncClosedCaptionScan` if the clip has no closed captions, or return from `imGetNextClosedCaption` when there are no more captions.
`imCancel`	Return from `imGetPrefs8` if user cancels or the plugin cannot open the file (custom/synthetic importer).
`imBadFormatIndex`	Return this when given an out of range format index, and from `imGetIndFormat` when plugin has no more formats to enumerate.
`imIsCacheable`	Return from `imInit` if a plugin does not need to be called to initialize every time Premiere is launched.
	This will help reduce the time to launch the application.