Re: [rtcweb] Platforms that support H264

Bossiel <bossiel@yahoo.fr> Sat, 02 November 2013 20:27 UTC

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From: Bossiel <bossiel@yahoo.fr>
Date: Sat, 2 Nov 2013 21:27:02 +0100
To: Gili <cowwoc@bbs.darktech.org>
Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Platforms that support H264
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CUDA works on windows XP and later. The developer needs the SDK and the end-user up-to-date drivers.

For Intel QuickSync there is an SDK but not needed if you're using Microsoft Media Foundation (Windows Platform SDK).

With CUDA, Intel Quick Sync, Win8-builtin- encoder, Webcams with UVC 1.5... you can have native H264 in 99% cases. We have a x264 fallback plugin in our open source products but rarely used.

Also note that Windows *Phone* 8 natively support H264 encoding/decoding. For reference implementation (open source SIP video client) you can follow the links I sent.

Sent from my iPhone

On Nov 2, 2013, at 21:06, Gili <cowwoc@bbs.darktech.org> wrote:

> Hi Bossiel,
> 
>     Thanks for the clarification. Are there existing libraries on top of CUDA and Intel Quick Sync that provide real-time H.264 encoding/decoding (with a reasonable license), or is this something we'd need to build ourselves?
> 
>     Also, please note that not all video cards support CUDA (only NVidia by last count), or run Intel CPUs (in spite of the fact that many do), so we still have a portability problem.
> 
> Thanks,
> Gili
> 
> On 11/2/2013 2:00 PM, Bossiel wrote:
>> On windows 7 you have CUDA and Intel Quick Sync
>> 
>> Sent from my iPhone
>> 
>> On Nov 2, 2013, at 18:41, Gili <cowwoc@bbs.darktech.org> wrote:
>> 
>>> 
>>>     So... the only platform that supports H.264 natively (real-time encoding/decoding) is Windows 8? Any others?
>>> 
>>> Gili
>>> 
>>> On 11/2/2013 1:27 PM, Bossiel thioriguel wrote:
>>>> @Emil
>>>> Both Windows 8 and 7 natively contain H.264 *encoder* (Thanks for                   Media foundation). The only issue with Windows 7 is the the encoder doesn't support realtime encoding (up to 3s delay).
>>>> You can also rely on the GPU (Cuda for Nvidia and Intel Quick Sync for Intel). Nothing to install for the end-user.
>>>> If you want reference code:
>>>> Media Foundation (Windows OS and Intel Quick Sync): https://code.google.com/p/doubango/source/browse/#svn%2Fbranches%2F2.0%2Fdoubango%2Fplugins%2FpluginWinMF
>>>> Nvidia Cuda: https://code.google.com/p/doubango/source/browse/#svn%2Fbranches%2F2.0%2Fdoubango%2Fplugins%2FpluginCUDA
>>>> 
>>>> 
>>>> 
>>>> Le Samedi 2 novembre 2013 18h14, Emil Ivov <emcho@jitsi.org> a écrit :
>>>> Same questions for OS X and Windows actually. Last time we checked (which was also some time ago) there was no way to get the OS to *encode* H.264 for you.
>>>> --sent from my mobile
>>>> On 2 Nov 2013 17:57, "tim panton" <tim@phonefromhere.com> wrote:
>>>> 
>>>> On 2 Nov 2013, at 15:02, Martin Thomson <martin.thomson@gmail.com> wrote:
>>>> 
>>>> > On 2 November 2013 07:37, cowwoc <cowwoc@bbs.darktech.org> wrote:
>>>> >>    I can't think of a single platform that supports real-time H.264
>>>> >> encoding/decoding natively today.
>>>> >
>>>> > That's a very strange way to put the question.
>>>> >
>>>> > Let me put another spin on it, and please excuse the example...
>>>> >
>>>> > Skype runs on more platforms than you might think.  Those platforms
>>>> > can all support H.264 to the extent that Skype requires.
>>>> 
>>>> Martin, can I ask you to talk with your Skype engineering team and check up on
>>>> the exact way that works on iOS. Last time I looked, it seemed you couldn’t use the
>>>> Apple supplied (hardware accelerated) h264 library for realtime encode/decode and
>>>> it wasn’t at all clear to me that the                             hardware encoder licence covered any soft implementation of h264 we
>>>> added.
>>>> 
>>>> I’d like to caveat that:
>>>>  1) it was a while ago. 2) I’m not a lawyer. 3) it was a thought experiment.
>>>> So it would be interesting to get a current view from the trenches.
>>>> 
>>>> T.
>>>> 
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>>>> 
>>>> 
>>>> 
>>>> 
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>