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Re: [codec] draft-spittka-payload-rtp-opus-00: a=fmtp:101 application=audio

Jean-Marc Valin <jmvalin@mozilla.com> Wed, 13 June 2012 00:38 UTC

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Date: Tue, 12 Jun 2012 20:38:09 -0400
From: Jean-Marc Valin <jmvalin@mozilla.com>
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To: Lars Immisch <lars@ibp.de>
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Cc: codec@ietf.org, Tim Pritlove <tim@pritlove.org>
Subject: Re: [codec] draft-spittka-payload-rtp-opus-00: a=fmtp:101 application=audio
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On 06/12/2012 06:33 PM, Lars Immisch wrote:
> But in our usecase (guest calls into broadcast studio), the
> receiver does know better. The recording will be broadcast and the
> receiver wants a way of saying: "Hey, send your best quality
> (because this will be broadcast)".

Just saying "encode at high bit-rate" is enough to get the best
quality. Also, note that the "application" setting has nothing to do
with the Opus format. It's just an option in the current libopus API.
Other Opus implementation may not have that option at all, or may
expose the equivalent through a totally different API. This is why it
cannot be included in the SDP.

Cheers,

	Jean-Marc

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