<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:st="" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40" xmlns:ns0="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:ns1="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:ns2="http://schemas.microsoft.com/office/2006/digsig" xmlns:ns3="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:ns4="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:ns5="http://schemas.microsoft.com/office/2004/12/omml" xmlns:ns6="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:ns7="http://microsoft.com/sharepoint/webpartpages" xmlns:ns8="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ns9="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:ns10="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:ns11="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:ns12="urn:schemas-microsoft-com:"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body lang=EN-US link=blue vlink=purple style='text-justify-trim:punctuation'> <div class=Section1> Without knowing any details about OMA, that sounds like it would work.  If you want something like a decodebin to automatically insert the decryption filter, you’ll want to do is use some caps to indicate whether there is OMA.  The caps should get set by your source (if it knows about them) or you could set them manually.  A third option is to write a filter that can automatically detect the DRM and set the caps to indicate when it’s present.<o:p></o:p> <o:p> </o:p> Depending on your goals/requirements, the insertion of the decryption filter might not have to be automatic.  In that case, you don’t necessarily need to worry about caps for it and can just build it into your pipeline when you know it’s needed.<o:p></o:p> <o:p> </o:p> If you haven’t already, I’d advise spending some time looking at the Plugin Writers’ Guide.  Parts of it are a bit out of date, but it will give you a better understanding of whether & how the framework supports what you want to do.  If you already have a basic understanding, then you could jump to the discussion of caps.<o:p></o:p> <o:p> </o:p>     <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html</a><o:p></o:p> <o:p> </o:p> <o:p> </o:p> Matt<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: Lin, Mengdong [mailto:mengdong.lin@intel.com] Sent: Monday, October 18, 2010 23:37 To: <st1:PersonName w:st="on">Discussion of the development of GStreamer</st1:PersonName> Cc: Gruenke, Matt Subject: RE: [gst-devel] Does GStreamer has a plan to support DRM (e.g. OMADRM)?<o:p></o:p> </div> <o:p> </o:p> Many thanks for your information, Matt!<o:p></o:p> <o:p> </o:p> We want to support OMA DRM 1.0. It protects the content by adding a encryption wrapper outside the original media file. To play the media, the wrapper must be removed and decryption is need to extract the original media file.<o:p></o:p> <o:p> </o:p> Is it possible to insert a DRM filter plug-in between the filesrc plug-in and demuxer plug-in?  The DRM filer can remove the wrapper and do decryption if need, or just let data pass through if no DRM wrapper is present.<o:p></o:p> <o:p> </o:p> Is the following pipe possible for the playbin?<o:p></o:p> Type finding:<o:p></o:p> Filesrc -> DRM wrapper filter  -> typefind -> fakesink   <o:p></o:p> <o:p> </o:p> Playback:<o:p></o:p> Filesrc -> DRM wrapper filter  -> demuxer -> decoder -> render<o:p></o:p> <o:p> </o:p> <o:p> </o:p> Best Regards<o:p></o:p> Amanda<o:p></o:p> <div> <div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'> From: Gruenke, Matt [mailto:mgruenke@Tycoint.com] Sent: Friday, October 15, 2010 1:00 PM To: <st1:PersonName w:st="on">Discussion of the development of GStreamer</st1:PersonName> Subject: Re: [gst-devel] Does GStreamer has a plan to support DRM (e.g. OMA DRM)?<o:p></o:p> </div> </div> <o:p> </o:p> What kind of framework support would it need?<o:p></o:p> <o:p> </o:p> For most formats, need only supply your own elements to encrypt/encode/encapsulate/mux and decrypt/decode/de-encapsulate/demux.  For the rest of the tasks, you can use the standard elements.<o:p></o:p> <o:p> </o:p> As a framework, GStreamer already has enough flexibility to accommodate most formats and applications.  There are only a few significant limitations that I’ve encountered – such as the inability to associate any information with a buffer that will survive arbitrary transformations.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> Matt<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center> </div> From: Lin, Mengdong [mailto:mengdong.lin@intel.com] Sent: Tuesday, October 12, 2010 23:40 To: gstreamer-devel@lists.sourceforge.net Subject: [gst-devel] Does GStreamer has a plan to support DRM (e.g. OMA DRM)?<o:p></o:p> </div> <o:p> </o:p> Does GStreamer has a plan to support DRM at the framework level? To provide a framework to handle different kinds of DRM solutions at the device end?<o:p></o:p> I saw there is a discussion in 2005 but there is no further update.<o:p></o:p> <o:p> </o:p> We want to provide a GStreamer-based solution to play media contents protected by OMA DRM 1.0. OMA DRM 1.0 is a open DRM standard. It wraps or encrypted the original media content in a wrapper file format. I wonder whether GStreamer will provide a standard workflow for us to write decryption plug-ins for the pipeline.<o:p></o:p> <o:p> </o:p> Thanks<o:p></o:p> Amanda<o:p></o:p> </div> </body> </html>