A method of providing supplemental processing information (52, 54) relating to encoded media content, said method comprising: providing supplemental processing information (52, 54) defining post-decoding instructions to media terminals (200, 210) for processing decoded media content obtainable by decoding said encoded media content to provide a correct rendering of said decoded media content during a media session, characterized by: providing a pseudo-identifier 'resv' as an alias of a media codec employed for encoding said media content; co-organizing said pseudo-identifier 'resv' and said supplemental processing information (52, 54) in a file to trigger abortion of decoding of said encoded media content by a legacy media terminal that does not recognize said pseudo-identifier 'resv' and to enable decoding of said encoded media content using said media codec and post-decoding processing of said decoded media content using said supplemental processing information (52, 54) by a media terminal that recognizes said pseudo-identifier 'resv', wherein co-organizing said pseudo-identifier 'resv' and said supplemental processing information comprises: generating a media container file comprising at least one media track defining said media content and at least one media data box comprising said encoded media content; providing, in said media container file, a sample entry box with said pseudo-identifier 'resv' as sample entry type and comprising a restricted scheme information box; providing, in said restricted scheme information box, a supplemental processing information box comprising said supplemental processing information (52, 54); and providing, in said restricted scheme information box, an original format box comprising a codec identifier of said media codec as representative of an original sample entry type. providing supplemental processing information (52, 54) defining post-decoding instructions to media terminals (200, 210) for processing decoded media content obtainable by decoding said encoded media content to provide a correct rendering of said decoded media content during a media session, characterized by: providing a pseudo-identifier 'resv' as an alias of a media codec employed for encoding said media content; co-organizing said pseudo-identifier 'resv' and said supplemental processing information (52, 54) in a file to trigger abortion of decoding of said encoded media content by a legacy media terminal that does not recognize said pseudo-identifier 'resv' and to enable decoding of said encoded media content using said media codec and post-decoding processing of said decoded media content using said supplemental processing information (52, 54) by a media terminal that recognizes said pseudo-identifier 'resv', wherein co-organizing said pseudo-identifier 'resv' and said supplemental processing information comprises: generating a media container file comprising at least one media track defining said media content and at least one media data box comprising said encoded media content; providing, in said media container file, a sample entry box with said pseudo-identifier 'resv' as sample entry type and comprising a restricted scheme information box; providing, in said restricted scheme information box, a supplemental processing information box comprising said supplemental processing information (52, 54); and providing, in said restricted scheme information box, an original format box comprising a codec identifier of said media codec as representative of an original sample entry type. providing a pseudo-identifier 'resv' as an alias of a media codec employed for encoding said media content; co-organizing said pseudo-identifier 'resv' and said supplemental processing information (52, 54) in a file to trigger abortion of decoding of said encoded media content by a legacy media terminal that does not recognize said pseudo-identifier 'resv' and to enable decoding of said encoded media content using said media codec and post-decoding processing of said decoded media content using said supplemental processing information (52, 54) by a media terminal that recognizes said pseudo-identifier 'resv', wherein co-organizing said pseudo-identifier 'resv' and said supplemental processing information comprises: generating a media container file comprising at least one media track defining said media content and at least one media data box comprising said encoded media content; providing, in said media container file, a sample entry box with said pseudo-identifier 'resv' as sample entry type and comprising a restricted scheme information box; providing, in said restricted scheme information box, a supplemental processing information box comprising said supplemental processing information (52, 54); and providing, in said restricted scheme information box, an original format box comprising a codec identifier of said media codec as representative of an original sample entry type. generating a media container file comprising at least one media track defining said media content and at least one media data box comprising said encoded media content; providing, in said media container file, a sample entry box with said pseudo-identifier 'resv' as sample entry type and comprising a restricted scheme information box; providing, in said restricted scheme information box, a supplemental processing information box comprising said supplemental processing information (52, 54); and providing, in said restricted scheme information box, an original format box comprising a codec identifier of said media codec as representative of an original sample entry type.