I know that this response is 6 months late, but you could use the development build found here - http://www.gisinternals.com/sdk/ or you could build your own. In order to accomplish what you are wanting to do without obtaining a third party encoding sdk, you will need the OpenJPEG library (v2) library - http://www.gdal.org/frmt_jp2openjpeg.html

I know that this response is 6 months late, but you could use the development build found here - Link or you could build your own. In order to accomplish what you are wanting to do without obtaining a third party encoding sdk, you will need the OpenJPEG library (v2) library - http://www.gdal.org/frmt_jp2openjpeg.html