[opus] Formula/heuristic for estimating packet size?

[Jean-Marc Valin]

Note also that the packet size you give the encoder also acts as an
absolute max on the bitrate. For example, if you ask for 32 kb/s VBR but
give a max packet size of 120 bytes, then you're absolutely certain the
bitrate will never go over 48 kb/s.

	Jean-Marc

On 05/12/2018 12:42 PM, Albin Stigö wrote:
> Just a follow up... I guess I was a bit confused about the VBR
> setting. I realise now that packets tend to stay very close to
> OPUS_SET_BITRATE so that solves my problem.
> 
> --Albin
> 
> On Sat, May 12, 2018 at 6:19 PM, Albin Stigö <albin.stigo at gmail.com> wrote:
>> Thanks for the input!
>>
>> --Albin
>>
>> On Sat, May 12, 2018 at 6:00 PM, Orestes Zoupanos
>> <oresteszoupanos at hotmail.com> wrote:
>>> Hi Albin!
>>>
>>> There may be some details at: https://tools.ietf.org/html/rfc7845#section-6
>>>
>>> Otherwise, I hope someone else on this list might be able to give a better
>>> formula for estimating packet size.
>>>
>>> Regards,
>>>
>>> Orestes
>>>
>>> On 12/05/2018 16:31, Albin Stigö wrote:
>>>
>>> Hello,
>>>
>>> I'm working on an Opus encoder block for GNUradio (a signal processing
>>> toolkit).
>>>
>>> I was wondering if there's some formula/heuristic for estimating the
>>> packet size average case / worst case given a certain encoder setting
>>> (assuming VBR).
>>>
>>> I need to provided a reasonable estimate to the GNUradio memory allocator.
>>>
>>>
>>> --Albin
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