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Re: [AVTCORE] What does "same codec+configuration" mean?

Iñaki Baz Castillo <ibc@aliax.net> Thu, 24 March 2016 15:41 UTC

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From: Iñaki Baz Castillo <ibc@aliax.net>
Date: Thu, 24 Mar 2016 16:27:30 +0100
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Subject: Re: [AVTCORE] What does "same codec+configuration" mean?
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2016-03-23 13:46 GMT+01:00 Iñaki Baz Castillo <ibc@aliax.net>:
> 4) H264 in Firefox:
>
>   a=rtpmap:126 H264/90000
>   a=fmtp:126 profile-level-id=42e01f;level-asymmetry-allowed=1;packetization-mode=1
>
>   a=rtpmap:97 H264/90000
>   a=fmtp:97 profile-level-id=42e01f;level-asymmetry-allowed=1
>
> Since Firefox offers two H264 codecs I must assume they are, indeed,
> different codecs. So it seems that "packetization-mode=1" make them
> different (which also means that its default value is not 1). Right?


I've clarified this:

https://tools.ietf.org/html/rfc6184#section-6

  6.2.  Single NAL Unit Mode

   This mode is in use when the value of the OPTIONAL packetization-mode
   media type parameter is equal to 0 or the packetization-mode is not
   present.  All receivers MUST support this mode.





-- 
Iñaki Baz Castillo
<ibc@aliax.net>

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