[Speex-dev] frame size for a given quality?

[Steve Kann]

Have you tried typing "speex rtp" into google code search?  It gives lots
of examples of real applications which do exactly that.

http://www.google.com/codesearch?as_q=speex+rtp


-SteveK


On 11/1/10 1:13 PM, "Jeff Ramin" <jeff.ramin at singlewire.com> wrote:

>
>Thanks again Steve. I'll search for the term you mention below.
>
>What I really want is to take the output of the speex encoder and spit
>it out on the network via RTP. I haven't been able to find a library or
>code
>example that does that.
>
>
>On 11/01/2010 12:03 PM, Steve Kann wrote:
>> Jeff,
>>
>>   It's in the manual:
>>
>> http://www.speex.org/docs/manual/speex-manual/node10.html  (table 3 and
>>4).
>>
>> However, if you're asking this, you're probably trying to do something
>> wrong, or the hard way.  You probably shouldn't be taking speex output,
>> and trying to "count bytes".   If you are using the API, then you will
>> just get the bits out, and then you'll know how many you have.
>>
>> If you're trying to stream an existing stream of speex-encoded bits,
>>then
>> it's pretty trivial to parse the stream.  I wrote something to do that a
>> long time ago (google speex_get_bits), though it may not do exactly what
>> you want.
>>
>> -SteveK
>>
>>
>>
>>
>>
>>
>> On 11/1/10 10:44 AM, "Jeff Ramin"<jeff.ramin at singlewire.com>  wrote:
>>
>>> Thanks Steve.
>>>
>>> Is there a document anywhere that shows how many bytes/bits of data
>>> are produced by the speex encoding process for a given amount of time
>>> sampling rate and quality setting?
>>>
>>>
>>> On 11/01/2010 09:41 AM, Steve Kann wrote:
>>>> Jeff,
>>>>
>>>>    RFC-5574 is standards-track:  http://tools.ietf.org/html/rfc5574
>>>>so,
>>>> while it's not an approved standard, it's more standardized than a lot
>>>> of
>>>> interoperable traffic on the internets these days.
>>>>
>>>>    The RFC specifies packetization guidelines, which is basically that
>>>> you
>>>> put one or more frames in a packet, and then pad the rest with 0 bits
>>>> until you have a while number of octets.
>>>>
>>>> -SteveK
>>>>
>>>>
>>>>
>>>> On 11/1/10 9:55 AM, "Jeff Ramin"<jeff.ramin at singlewire.com>   wrote:
>>>>
>>>>> I need to stream speex-encoded audio over RTP, which doesn't seem
>>>>> to be standardized yet, so I'm gonna roll my own code. I control both
>>>>> the
>>>>> sending and receiving sides, so I can pretty much do what I want.
>>>>>
>>>>> I want each packet to contain 20ms worth of audio (sampled at 8KHz),
>>>>> and I'm encoding using a constant bit rate and quality:6.
>>>>>
>>>>> Q: how do I determine how many bytes of data go into each packet? I'm
>>>>> putting one frame (20 ms) into each packet.
>>>>>
>>>>> Thanks!
>>>>>
>>>>> -- 
>>>>> Jeff Ramin
>>>>> Software Engineer
>>>>> Singlewire Software
>>>>> 2601 W Beltline Hwy #510
>>>>> Madison, WI 53713
>>>>>
>>>>> Phone Direct - 608.661.1172
>>>>> www.singlewire.com
>>>>>
>>>>> _______________________________________________
>>>>> Speex-dev mailing list
>>>>> Speex-dev at xiph.org
>>>>> http://lists.xiph.org/mailman/listinfo/speex-dev
>>>
>>> -- 
>>> Jeff Ramin
>>> Software Engineer
>>> Singlewire Software
>>> 2601 W Beltline Hwy #510
>>> Madison, WI 53713
>>>
>>> Phone Direct - 608.661.1172
>>> www.singlewire.com
>>>
>>
>
>
>-- 
>Jeff Ramin
>Software Engineer
>Singlewire Software
>2601 W Beltline Hwy #510
>Madison, WI 53713
>
>Phone Direct - 608.661.1172
>www.singlewire.com
>