TIEMediaFoundationSourceReader.GetCurrentMediaType

Declaration

function GetCurrentMediaType(streamIndex: integer): TIEDictionary; overload;
function GetCurrentMediaType(const streamType: WideString): TIEDictionary; overload;

Description

Returns the actual media type for the specified stream.
Applications should call GetCurrentMediaType to check the actual selected media type after a call to SelectMediaType, SetMediaTypeVideo or SetMediaTypeAudio.
See GetMediaType for the list of keys in the resulting dictionary.

Parameter	Description
streamIndex	Index of the stream, in the range of 0 to StreamCount - 1
streamType	A string representing the stream type. Only the first stream of this type will be considered. Can be any one of the values accepted by GetStreamType

Note: If you have not selected a media type the default will be returned

Example

// Get the actual video format (because a conversion may have occurred, e.g. MJPEG may be converted to YUY2)
with ImageEnView1.IO.MediaFoundationSourceReader.GetCurrentMediaType(mmf_VIDEO_STREAM) do
begin
  Label4.Caption := Format('Actual video format: %d x %d   %.1f fps   %s',
           [GetInteger(IEFRAMEWIDTH_DICT_KEY),    // width
            GetInteger(IEFRAMEHEIGHT_DICT_KEY),   // height
            GetDouble(IEFRAMERATE_DICT_KEY),      // frame rate
            GetString(IESUBTYPE_DICT_KEY)         // subtype = color space
            ]);
end;

TIEMediaFoundationSourceReader.GetCurrentMediaType