A lot of users try to convert Smooth Streaming MPEG-4 multimedia fragments (.ismv) back to the original MP4 video (.mp4), i.e. perform ismv to mp4 conversion.
This seems can be done with the open source mp4split utility with the following command: "MP4Split.exe -o output.mp4 input.ismv". Other than that, you may probably found other deployment platform for IIS (Internet Information Services).