Hi, I upload two wav files to explain my problem. The file recorded by this way(http://trac.pjsip.org/repos/wiki/audio-how-to-record) could be found here http://moon.cse.yzu.edu.tw/~s912356/output_people_8000.wav. It sound slow and low pitch. The correct one should sound like this http://moon.cse.yzu.edu.tw/~s912356/output_people_16000.wav. I made following testings to clarify my problem. 1. "cat /dev/dsp > file", and then "cat file > /dev/dsp" => Correct 2. Record and Play audio by portaudio(testing src is third_party/portaudio/test/patest_record.c) => Correct 3. PJSUA Looping-back testing(http://trac.pjsip.org/repos/wiki/audio-check-loopback) => Correct 4. Record any audio either from file or mic by PJSUA, and Play them on Davinci by PJSUA and sample/playfile => Correct 5. Record any audio either from file or mic by PJSUA, and Play them on my PC by mplayer => Slow and low pitch. It would be correct if playing it with double rate, saying 16000Hz. 6. VoIP between PJSUA on Davinci and PJSUA on Linux. => Slow and low pitch. So I infer the problem is triggered by pjsip. How can I dig out them in pjsip? FCWu 2008/10/10 Nanang Izzuddin <nanang at pjsip.org>: > Hi, > > Not sure what's going on, but I agree it seems to be a sound device > issue, e.g: it may be actually opened in either stereo or 16KHz. I > found this old post that may be related to this issue: > http://mlblog.osdir.com/linux.davinci/2006-10/msg00283.shtml, as it > says "Davinci OSS driver don't work correctly in mono mode and driver > still return two samples per tick". Perhaps you can check this by > running pjsua in stereo mode (with param '--stereo') and see the mic > recording result. Then you can also check pjsua with clock rate 16KHz. > > In case it *is* sound device issue, you can also search/post a > question in the PortAudio forum (PJSIP uses PortAudio on linux > platform). Moreover, you can implement your own sound device wrapper, > please see http://trac.pjsip.org/repos/wiki/External_Sound_Device for > the build config. > > Regards, > nanang > > > On Thu, Oct 9, 2008 at 1:25 PM, Fan-Cheng Wu ?????\ <fcwu.cs95g at nctu.edu.tw> wrote: >> Hi All, >> >> I experienced pjsua on TI Davinci, which configured ./aconfigure >> --host=armv5tl-montavista-linuxeabi CFLAGS='-O2 -msoft-float -DNDEBUG >> -mcpu=arm926ej-s' --disable-floating-point and defined "#define >> PJSUA_DEFAULT_CLOCK_RATE (8000)" on config_site.h. >> When I run pjsua to record sound of 10 second from mic to a file, the >> file would be extended to 20 second long and sound lower pitch than >> original one. (Play it with double rate, it sound fine.) I suppose >> it's because recording device has wrong recording rate. Anybody knows >> how can I adjust it? >> >> p.s. If I recorded a default ring sound from port 02 (Port #02[ >> 8KHz/20ms/1] ring transmitting to: ), it's also correct. So the >> problem come from recording device (?). >> >> The following are the steps I recorded sound from mic. >> ./pjsua-armv5tl-montavista-linux-gnueabi --rec-file=output.wav >> --clock-rate=8000 --snd-clock-rate=8000 >> ... >>>>> cc 0 1 >> 07:49:01.566 pjsua_media.c pjsua_set_snd_dev(): attempting to open >> devices @8000 Hz >> 07:49:01.758 ec0x150df8 AEC created, clock_rate=8000, channel=1, >> samples per frame=160, tail length=200 ms, latency=96 ms >> 07:49:01.759 conference.c Port 3 (ring) transmitting to port 1 (output.wav) >> >> >> >> Best Regards, >> FCWu >> >> _______________________________________________ >> 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 >> > > _______________________________________________ > 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 > >
