How to support mxf file formats in mediafoundation source Reader and sink writer

Question

I am creating a transcoder application using windows mediafoundation API. I am using Source Reader and Sink Writer API's for transcoding. Now I need to add support for media types like(.mxf) , which is not supported by mediafoundation . Media foundation documentation says, "Third parties can support additional formats by writing custom plug-ins." Can anyone help with documentations or example on how to get started writing custom plug ins.

Answer 1

You need your own implementation of IMFMediaSource to read such files and IMFMediaSink to write.

For sources, MSDN entry points are:

• Writing a Custom Media Source
• Case Study: MPEG-1 Media Source and there is a source code in the form of a mpeg1source sample

For sinks it is:

• Media Sinks

Your implementation of Media Foundation primitives could be used with higher level APIs like Source Reader, Sink Writer and also Media Foundation Media Session.

The samples also include wavsource and wavsink which are also good examples for the mentioned above.