[Freeswitch-users] Change mod_skypopen ptime to 10ms?

[Steven Ayre]

However, 10ms shouldn't be a noticable amount and it'll increase the
bandwidth required by doubling the overhead. On a slow link that could
actually lead to dropped packets and worse quality. :o)

-Steve


On 21 November 2010 05:54, Roman_ <lists at ione.ch> wrote:
>
>
> Giovanni Maruzzelli-2 wrote:
>>
>> So, do it, hack the code until it works perfect (not only in this
>> case,  also in the default case) then contribute a patch.
>>
>
> Fair enough :-). I gave it a try and made the frame size in milliseconds a
> compile-time option (i.e., adding some #defines). Both 20ms and 10ms seem to
> work flawlessly so far.
>
> Concerning the sampling frequency, the Skype API states that connecting
> through the API will only support 16kHz anyway, even if the call itself uses
> 24kHz, so there is no point in changing the sampling frequency in
> mod_skypopen.
>
> Nevertheless, after having made the changes to support 10ms frame size, I
> figured out that FreeSWITCH will in fact happily convert between 20ms and
> 10ms frame size if needed by using a write buffer. So, strictly speaking, my
> patch would not be necessary. As I understand it, however, using 10ms
> instead of 20ms should reduce the total latency by up to 10ms, so there
> might still be some justification to using 10ms.
>
> So, to summarize, I got mod_skypopen to work with 10ms, but the only benefit
> currently seems to be that it could reduce the total latency a bit. As such
> I am not sure that the patch is of general interest, but if anyone would
> like to give it a try or finds it useful for other reasons I would be happy
> to provide a patch.
>
> Regards,
>
> Roman
>
> --
> View this message in context: http://freeswitch-users.2379917.n2.nabble.com/Change-mod-skypopen-ptime-to-10ms-tp5750371p5759646.html
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>
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