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Re: Custom and extending CDM to support other DRM systems

From: Glenn Adams <glenn@skynav.com>
Date: Fri, 30 Jan 2015 08:39:20 -0700
Message-ID: <CACQ=j+eq5cf++TQ77UvX_7=6WjDD4hVh9DFMDQ5Qf=Bf2h71hA@mail.gmail.com>
To: Emmanuel Poitier <emmanuel.poitier@enman.fr>
Cc: "public-html-media@w3.org" <public-html-media@w3.org>
On Fri, Jan 30, 2015 at 8:34 AM, Emmanuel Poitier <emmanuel.poitier@enman.fr
> wrote:

>  Glenn,
>
> thanks a lot for you answer. Though I would prefer to hear it from the
> editors, and to provide possibly any direct contact to start a discussion
> which may not be part of this mailing list, but EME does include indeed as
> the chart shows different components, and CDM is one of them.
>

Like I said, it is a conceptual component. I have participated in this work
since it started (though not so much in last few months), so you can take
my word for the group's position on this subject.


>
> Thanks in advance for any persons willing to discuss it further, or to
> create a different discussion thread to talk about it.
>
> Le 30/01/2015 16:25, Glenn Adams a écrit :
>
>
>
> On Fri, Jan 30, 2015 at 8:20 AM, Emmanuel Poitier <
> emmanuel.poitier@enman.fr> wrote:
>
>>  Glenn,
>>
>> thanks for the answer, but I do believe that the EME draft is to be a
>> standard at the end, so I would expect to have the CDM standardized as well
>> as it is part of the EME system.\
>>
>
>  No, it will not be. That is the final word from the WG.
>
>
>>
>> I won't mind if this thread can be the start of standardizing the CDM
>> which is in my view essential to have conformance across browsers and to
>> allow any DRM system to be used across all of them.
>>
>
>  This is the wrong forum for such a thread. You need to build support
> among the UA vendors, and if you fail to do that, you won't have any chance.
>
>
>>
>> Le 30/01/2015 15:58, Glenn Adams a écrit :
>>
>>
>> On Fri, Jan 30, 2015 at 7:49 AM, Emmanuel Poitier <
>> emmanuel.poitier@enman.fr> wrote:
>>
>>>  All,
>>>
>>> I am currently looking after the information on how to extend the CDM to
>>> support other DRM systems, which is nowadays fixed and hardcoded for each
>>> browsers (IE with PlayReady, Chrome with Widevine, Safari with FairPlay).
>>> It would be nice to ensure the EME spec does provide information and also
>>> how browsers would support that in an agnostic manner to ensure a non
>>> fragmented market where the user does want to play a protected video
>>> content whatever the browser he is using.
>>>
>>
>>  I doubt if anything has changed on this front, but this type of
>> specification was ruled out of scope for EME. EME uses the term and concept
>> "CDM" only in a notional manner, and does not specify any concrete
>> interface to such a component.
>>
>>  It is likely that interface and any mechanism for adding/extending UA
>> supplied CDMs will remain UA specific, that is, until some organization
>> steps forward to standardize it (assuming UA vendors are willing to do
>> that... a dubitable proposition).
>>
>>
>>
>>>
>>> Thanks in advance for any information and help you may provide.
>>>
>>> Best regards,
>>> --
>>> Emmanuel Poitier - Chief Executive Officer (CEO)
>>> Enman
>>>
>>>   Telephone: +33 (0)2 54 67 15 38
>>>  Mobile: +33 (0)780 381 124  Email: emmanuel.poitier@enman.fr
>>>  Web site:http://enman.fr
>>>
>>
>>
>> Best regards,
>> --
>> Emmanuel Poitier - Chief Executive Officer (CEO)
>> Enman
>>
>>   Telephone: +33 (0)2 54 67 15 38 <%2B33%20%280%292%2054%2067%2015%2038>
>>  Mobile: +33 (0)780 381 124  Email: emmanuel.poitier@enman.fr
>>  Web site:http://enman.fr
>>
>
>
>
> --
> Emmanuel Poitier - Chief Executive Officer (CEO)
> Enman
>
>   Telephone: +33 (0)2 54 67 15 38
>  Mobile: +33 (0)780 381 124  Email: emmanuel.poitier@enman.fr
>  Web site:http://enman.fr
>
Received on Friday, 30 January 2015 15:40:07 UTC

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