ISMDownloader is a more generic application than RTLdownloader
. It allows to download Silverlight streams and save them as MKV files.
ISM Downloader is available at:
ismdownloader <manifest url> <output: *.mkv>
Obviously, this needs the manifest URL, so you will need to use an HTTP monitor application, such as Charles. There are other such utilities, of course.
I believe that the ISM utility locates the optimum bandwidth stream for your system/connection**, then downloads the fragments, and finally merges all the fragments into a final, playable .MKV file package.
** (not sure of this, or if it merely takes the highest bandwidth available on the server)