Hi Benny My experience is PA-WMME has high latency over 50ms. PA-DS will work with 60 - 40ms. That's why I have choosen PA-DS. I compiled PJMEDIA with PA-WDMKS as you recommended and it works fine (on some soundcards, usb does not work) using 40ms latency. When I try less than 40ms latency PJMEDIA crashes. Why? Regards Michael. --- On Fri, 5/15/09, Benny Prijono <bennylp at teluu.com> wrote: > From: Benny Prijono <bennylp@xxxxxxxxx> > Subject: Re: Audio drop out on caller site after running pjsua several hours > To: "pjsip list" <pjsip at lists.pjsip.org> > Date: Friday, May 15, 2009, 9:39 AM > On Fri, May 15, 2009 at 9:09 AM, > Michael <michael_zurich at yahoo.com> > wrote: > > Hi Benny > I compiled pj with portaudio PA-DS instead of > factory PA-WMME and reduced latency to 40ms. Latency is the > reason for PA-DS. This works fine for some hours.? > > > > Hi Michael, > > actually another user also reported similar problem, with > our (old) dsound.c DS sound abstraction. So two different DS > implementations exhibit the same problem, there's a good > possibility that this is DS problem. Please try with > PA-WMME, 40ms doesn't sound much IMO, especially with > this stability cost. In the mean time, we're working on > optimizing the latency with the native WMME backend in the > next one or two releases. > > > Or if you can afford it, you can probably try with the so > called Kernel Streaming (WDMKS) backend in PortAudio. This > should give the best latency on windows since it bypasses > the kernel mixer, but at the cost of exclusive use of the > device (only one app can use the sound device at a time). > Who knows maybe it'll be more stable as well. You will > need to add PA-WDMKS source file in our PA Visual Studio > project though. > > > cheers > ?Benny > > > ?Kind > Regards > > Michael > > > > -----Inline Attachment Follows----- > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >
