[Speex-dev] frame size for a given quality?
stevek at stevek.com
Mon Nov 1 07:41:36 PDT 2010
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.
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.
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