这不是重复的问题，其他用户也有相同的问题，但是此问题添加了更多信息。我正在使用Ubuntu 18。
当我通过VoIP和星号服务器收到呼叫时，我的python脚本崩溃了。此python脚本可在其他计算机上使用，但不适用于我的计算机。所以我试图诊断pjsip依赖关系，因为问题出在那儿。
我使用pjsip作为Python Most Voip Library的依赖项
pjsip的安装过程如下：
mkdir -p pjsip
cd pjsip
svn co http://svn.pjsip.org/repos/pjproject/trunk/
cd trunk
./configure CFLAGS='-fPIC' -with-ffmpeg
make dep -j4
make clean
make -j4
sudo make install
cd pjsip-apps/src/python/
python2 setup.py install --user
之后，我使用测试二进制文件检查我的计算机：
./pjsip/trunk/pjsip-apps/bin/pjsystest-x86_64-unknown-linux-gnu
测试菜单如下：
17:54:00.264 os_core_unix.c !pjlib 2.8-svn for POSIX initialized
17:54:00.265 sip_endpoint.c .Creating endpoint instance...
17:54:00.265 pjlib .select() I/O Queue created (0x55d462ccde00)
17:54:00.265 sip_endpoint.c .Module "mod-msg-print" registered
17:54:00.265 sip_transport.c .Transport manager created.
17:54:00.265 pjsua_core.c .PJSUA state changed: NULL --> CREATED
17:54:00.266 sip_endpoint.c .Module "mod-pjsua-log" registered
17:54:00.266 sip_endpoint.c .Module "mod-tsx-layer" registered
17:54:00.266 sip_endpoint.c .Module "mod-stateful-util" registered
17:54:00.266 sip_endpoint.c .Module "mod-ua" registered
17:54:00.266 sip_endpoint.c .Module "mod-100rel" registered
17:54:00.266 sip_endpoint.c .Module "mod-pjsua" registered
17:54:00.266 sip_endpoint.c .Module "mod-invite" registered
17:54:01.427 alsa_dev.c ..ALSA driver found 32 devices
17:54:01.427 alsa_dev.c ..ALSA initialized
17:54:01.427 pjlib ..select() I/O Queue created (0x55d462d58e28)
17:54:01.430 sip_endpoint.c .Module "mod-evsub" registered
17:54:01.430 sip_endpoint.c .Module "mod-presence" registered
17:54:01.430 sip_endpoint.c .Module "mod-mwi" registered
17:54:01.430 sip_endpoint.c .Module "mod-refer" registered
17:54:01.430 sip_endpoint.c .Module "mod-pjsua-pres" registered
17:54:01.430 sip_endpoint.c .Module "mod-pjsua-im" registered
17:54:01.430 sip_endpoint.c .Module "mod-pjsua-options" registered
17:54:01.430 pjsua_core.c .1 SIP worker threads created
17:54:01.430 pjsua_core.c .pjsua version 2.8-svn for Linux-4.15.0.43/x86_64/glibc-2.27 initialized
17:54:01.430 pjsua_core.c .PJSUA state changed: CREATED --> INIT
17:54:01.430 pjsua_core.c PJSUA state changed: INIT --> STARTING
17:54:01.430 sip_endpoint.c .Module "mod-unsolicited-mwi" registered
17:54:01.430 pjsua_core.c .PJSUA state changed: STARTING --> RUNNING
M E N U :
---------
0: Tests
00: Run test wizard
01: Device Test
02: Play Tone
03: Play WAV File1
04: Play WAV File2
05: Record Audio
06: Latency Test
07: AEC/AES Test
09: Exit
1: Options
10: View Devices
11: View Settings
Enter the menu number: 03
选择选项03，我得到以下输出：
This test will play input.8.wav file to the speaker. Please listen carefully for audio impairments such as stutter. Let this test run for a while to make sure that everything is okay. Press OK to start, CANCEL to skip
1:OK 9:Cancel
1
17:54:28.350 systest.c Running WAV File Playback Test
17:54:28.350 pjsua_aud.c Creating file player: input.8.wav..
17:54:28.350 pjsua_aud.c .Unable to open file for playback: Not found (PJ_ENOTFOUND) [status=70006]
17:54:28.351 pjsua_aud.c Creating file player: ../../tests/pjsua/wavs/input.8.wav..
17:54:28.351 wav_player.c .File player '../../tests/pjsua/wavs/input.8.wav' created: samp.rate=8000, ch=1, bufsize=4KB, filesize=67KB
17:54:28.351 pjsua_aud.c .Player created, id=0, slot=1
17:54:28.351 pjsua_aud.c Conf connect: 1 --> 0
17:54:28.351 pjsua_aud.c .Set sound device: capture=-1, playback=-2
17:54:28.351 pjsua_aud.c ..Opening sound device (speaker + mic) PCM@8000/1/20ms
17:54:28.412 conference.c !.Port 1 (../../tests/pjsua/wavs/input.8.wav) transmitting to port 0 (default)
这是在我有来电时崩溃我的python脚本的相同问题：
Incoming call from "test_user" <sip:test_user@192.168.30.30>
in _start_call_sound_in
[Wed Jan 23 17:56:31 2019] 17:56:31.426 pjsua_aud.c ...Unable to open file for playback: Not found (PJ_ENOTFOUND) [status=70006]
Unhandled exception in thread started by <function _worker_thread_main at 0x7fb34d50ba28>
Traceback (most recent call last):
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/pjsua.py", line 2951, in _worker_thread_main
time.sleep(0.050)
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/pjsua.py", line 2899, in _cb_on_incoming_call
_lib._cb_on_incoming_call(acc_id, call_id, rdata)
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/pjsua.py", line 2781, in _cb_on_incoming_call
acc._cb.on_incoming_call( Call(self, call_id) )
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/most/voip/api_backend.py", line 602, in on_incoming_call
_start_call_sound_in()
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/most/voip/api_backend.py", line 128, in _start_call_sound_in
player_in_id = pj.Lib.instance().create_player(sound_file,loop=True)
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/pjsua.py", line 2579, in create_player
self._err_check("create_player()", self, err)
File "/home/ubuntu_user/.local/lib/python2.7/site-packages/pjsua.py", line 2723, in _err_check
raise Error(op_name, obj, err_code, err_msg)
pjsua.Error: Object: Lib, operation=create_player(), error=Not found (PJ_ENOTFOUND)
问题出在pjsip，与播放流音频有关。
Ubuntu默认使用ALSA，看来一切正常。我有sox utils，可以正确播放wav文件。
一些想法？
答案 0 :(得分：1)
在调试python库后，我发现当调用到达时，将尝试使用wav文件。我使用--user选项安装了python库，并且该库查找文件的地方是错误的。
使用--user选项可在非标准系统路径中进行安装。如果有电话到达，将找不到wav文件，并且python库崩溃。要解决此问题，只需将符号链接添加到正确的路径即可：
sudo ln -s /usr/local/lib/python2.7/dist-packages/data/ ${HOME}/.local/lib/python2.7/site-packages/
ls # output shall contain sounds folder
通过此链接，库可以接受播放wav文件的调用。