[rtcweb] Martin J. Duerst's preferences (was: Re: Straw Poll on Video Codec Alternatives)

Bjoern Hoehrmann <derhoermi@gmx.net> Sun, 12 January 2014 19:19 UTC

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From: Bjoern Hoehrmann <derhoermi@gmx.net>
To: "\"Martin J. Dürst\"" <duerst@it.aoyama.ac.jp>
Date: Sun, 12 Jan 2014 20:19:14 +0100
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Subject: [rtcweb] Martin J. Duerst's preferences (was: Re: Straw Poll on Video Codec Alternatives)
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* Martin J. Dürst wrote:
>Below are my opinions. I'm using a numerical with 0.0 meaning NO and 1.0 
>meaning YES, everything in between is acceptable, with various degrees.

Among the single codec options your order of preference then is

  VP8 > H.261 > H.264 >= no MTI > MJPEG > Theora > H.263
  0.8 >   0.4 >   0.2 >=    0.2 >   0.1 >   0.05 >  0.01

>>        9.   All entities MUST support Theora
>>        Are you in favor of this option [Yes/No/Acceptable]:
>0.05
>>        Do you have any objections to this option, if so please summarize
>>        them:
>I don't think there are significantly less risks with Theora than with 
>VP8, so I don't think it's worth prescribing, because quality is less 
>than VP8.

>>        16.   All entities MUST support Motion JPEG
>>        Are you in favor of this option [Yes/No/Acceptable]:
>0.1
>>        Do you have any objections to this option, if so please summarize
>>        them:
>If it can be shown that Motion JPEG produces acceptable results for sign 
>language, then this is an alternative to H.261.

An alternative to H.261 should have at least 0.2 in your rating system.
It looks as though you prefer MJPEG, even without sign language support,
to Theora, which has no difficulty with sign language at normal rates.
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