谁能告诉我为什么会这样？
iOS10、iPhone5s、VOIP Siphon pjsip2.5.5.
这些问题不是每次都出现，有时在你想调用或接听电话时会出现(添加:20161226)。
打开声音设备时出错:
14:06:03.137742 pjsua_aud.c ....Set sound device: capture=-1, playback=-2
14:06:03.137775 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@16000/1/20ms
14:06:03.137837 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.147404 acquire_call enter,call_id:2
14:06:03.233365 level:4,msg:14:06:03.233 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@44100/1/20ms
14:06:03.233488 level:4,msg:14:06:03.233 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.263379 AVAudioSessionRouteChangeNotification ..changeReason..3
14:06:03.439201 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@48000/1/20ms
14:06:03.444813 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.518592 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@32000/1/20ms
14:06:03.518731 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.587808 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@16000/1/20ms
14:06:03.587936 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.659660 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@8000/1/20ms
14:06:03.659837 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.734433 pjsua_aud.c .....Unable to open sound device: Unknown OpenSSL error 503317117 [status=506637]
14:06:03.734512 pjsua_aud.c ....Error opening sound device: Unknown OpenSSL error 503317117 [status=506637]
14:06:03.734534 pjsua_aud.c ...Conf connect: 0 --> 2
14:06:03.734555 pjsua_aud.c ....Set sound device: capture=-1, playback=-2
14:06:03.734586 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@16000/1/20ms
14:06:03.734651 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.799718 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@44100/1/20ms
14:06:03.799847 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.868825 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@48000/1/20ms
14:06:03.869031 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:03.936294 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@32000/1/20ms
14:06:03.936423 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:04.006834 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@16000/1/20ms
14:06:04.006962 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:04.075150 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@8000/1/20ms
14:06:04.075288 coreaudio_dev. ......Using VoiceProcessingIO audio unit
14:06:04.144082 pjsua_aud.c .....Unable to open sound device: Unknown OpenSSL error 503317117 [status=506637]
14:06:04.144165 pjsua_aud.c ....Error opening sound device: Unknown OpenSSL error 503317117 [status=506637]
14:06:04.144186 pjsua_conf_connect:pjsua_conf_connect_value 506637 ret 506637
今天(2016-12-16)，我得到同样的错误，但错误编号不同(iphone5 ios10.1.1 siphone pjsip2.5.5)
316-981188544 2016-12-16 10:52:29.160553 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@44100/1/20ms
316-981188544 2016-12-16 10:52:29.160689 coreaudio_dev. ......Using VoiceProcessingIO audio unit
316-981188544 2016-12-16 10:52:29.167254 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@48000/1/20ms
316-981188544 2016-12-16 10:52:29.167391 coreaudio_dev. ......Using VoiceProcessingIO audio unit
316-981188544 2016-12-16 10:52:29.172857 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@32000/1/20ms
316-981188544 2016-12-16 10:52:29.172994 coreaudio_dev. ......Using VoiceProcessingIO audio unit
316-981188544 2016-12-16 10:52:29.178400 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@16000/1/20ms
316-981188544 2016-12-16 10:52:29.178539 coreaudio_dev. ......Using VoiceProcessingIO audio unit
316-981188544 2016-12-16 10:52:29.184486 pjsua_aud.c .....Opening sound device (speaker + mic) PCM@8000/1/20ms
316-981188544 2016-12-16 10:52:29.184631 coreaudio_dev. ......Using VoiceProcessingIO audio unit
316-981188544 2016-12-16 10:52:29.195032 pjsua_aud.c .....Unable to open sound device: Unknown error -1701297535 [status=-1701297535]
316-981188544 2016-12-16 10:52:29.195105 pjsua_aud.c ....Error opening sound device: Unknown error -1701297535 [status=-1701297535]
步骤1:首先在Supporting Files文件夹中打开您的xcode项目中的info.plist文件，然后点击信息属性列表中的“+”>。
第 2 步:选择并在列表中添加 隐私 - 麦克风使用说明。
第 3 步:在 Privacy - Microphone Usage Description 中添加值 Microphone。
现在编译并运行您的项目。
关于ios10 iphone5s voip siphon pjsip2.5.5 打开声音设备时出错，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40989940/
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