hi Johan & Benny Thanks for the replies. Ok if we use what Benny is suggesting the PLAY Latency=160; based on the below settings I will have a minimum latency in the app of 540ms (being the total of frame_ptime+ec_tail+rec latency+play latency). Is my calculations correct? If my calculations are correct, I think the latency will be very high once the sound gets to the remote party on an actual call. Benny what do you recommend for the RECORD Latency value? media_cfg.clock_rate = 8000; media_cfg.ptime = 20; //default codec ptime media_cfg.audio_frame_ptime = 20; // media_cfg.ec_tail_len = 200; // 0 media_cfg.snd_rec_latency = 160; // original 100 media_cfg.snd_play_latency = 160; // original 100 media_cfg.ec_options = PJMEDIA_ECHO_SIMPLE; // default = 0 Best regards jerry ------------------------------ Message: 4 Date: Mon, 11 Jan 2010 09:54:09 +0100 From: Johan Lantz <johan.lantz@xxxxxxxxxxx> To: pjsip at lists.pjsip.org Subject: Re: Latency tweaks for Windows Mobile 6 (Jerry Monteiro) Message-ID: <4B4AE731.1010008 at genaker.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi Jerry I have only done measurments with ptime 80 and 100 and these are ok. One thing that caused me a lot of problems was that some of my phones was not able to produce frames fast enough when PJMEDIA_SND_DEFAULT_REC_LATENCY was 100 i.e. the old setting. I think Benny changed this to a higher value later on but I still have 200 on some old devices like HTC 3600 while more powerful devices like Motorola Symbol can handle 100. I have never played with the PJMEDIA_CODEC_MAX_SILENCE_PERIOD /Johan Jerry wrote: Hi all I am hoping someone could advise some of the optimal settings you have found to work well for windows mobile 6 and above. Reading through the mailing lists, I have found some people that have used the settings below, but would like if you could post the Values you have used and perhaps other settings apart from the ones below. #define PJMEDIA_SND_DEFAULT_REC_LATENCY = ? #define PJMEDIA_SND_DEFAULT_PLAY_LATENCY = ? PJMEDIA_CODEC_MAX_SILENCE_PERIOD = ? frame ptime = ? ------------------------------ Message: 8 Date: Mon, 11 Jan 2010 16:22:29 +0000 From: Benny Prijono <bennylp@xxxxxxxxx> To: pjsip list <pjsip at lists.pjsip.org> Subject: Re: Latency tweaks for Windows Mobile 6 (Jerry Monteiro) Message-ID: <49a4be81001110822t6bd263e4se372863b01f7ec15 at mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Thanks for the info, Johan. Actually I changed PJMEDIA_SND_DEFAULT_PLAY_LATENCY (i.e. not REC) from 100ms to 160ms for WM and to 140 on Win32, on release 1.5 (see ticket #983). Cheers Benny On Mon, Jan 11, 2010 at 8:54 AM, Johan Lantz <johan.lantz at genaker.net> wrote: > Hi Jerry > > I have only done measurments with ptime 80 and 100 and these are ok. > > One thing that caused me a lot of problems was that some of my phones was > not able to produce frames fast enough when PJMEDIA_SND_DEFAULT_REC_LATENCY > was 100 i.e. the old setting. I think Benny changed this to a higher value > later on but I still have 200 on some old devices like HTC 3600 while more > powerful devices like Motorola Symbol can handle 100. > > I have never played with the PJMEDIA_CODEC_MAX_SILENCE_PERIOD > > > /Johan > ------------------------------ _______________________________________________ pjsip mailing list pjsip at lists.pjsip.org http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org End of pjsip Digest, Vol 29, Issue 14 *************************************
