<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:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 12 (filtered medium)">  <style>  </style>  </head> <body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'> <div class=WordSection1> 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 0cm 0cm 0cm'> From: Gruenke, Matt [mailto:mgruenke@Tycoint.com] Sent: Friday, October 15, 2010 1:00 PM To: Discussion of the development of GStreamer 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>