PJSUA2-将通话音频录制到WAV文件 [英] PJSUA2 - Recording call audio to wav file

问题描述

我使用PJSUA2尝试直接将来电记录到wav文件中，但是听不到wav文件中的任何音频.

Using PJSUA2 I'm trying to record an incoming call directly to a wav file but can't hear any audio in the wav file.

以下代码:

void SipCall::onCallMediaState(pj::OnCallMediaStateParam& /*prm*/)
{
    pj::CallInfo call_info = getInfo();
    pj::AudioMedia* audio_media = 0;

    for (unsigned int i = 0; i < call_info.media.size(); ++i) {
        if (call_info.media[i].type == PJMEDIA_TYPE_AUDIO) {
            audio_media = static_cast<pj::AudioMedia*>(getMedia(i));
            break;
        }
    }

     if (audio_media != 0) {
            try {    
                pj::AudioMediaRecorder recorder;
                recorder.createRecorder("file.wav");
                audio_media->startTransmit(recorder);   
                pj_thread_sleep(5000);
                audio_media->stopTransmit(recorder);   
            }  
            catch (pj::Error& err) {
                qWarning("[SipAccount::onIncomingCall] : Failed to record call to %s. Error = %s", "file.wav", err.info().data());    
           }        
      }
 }

关于PJSUA2的文档很差，所以有人知道我在做什么错吗?

There's poor documentation on PJSUA2 so does anyone have any idea what I'm doing wrong?

推荐答案

出现了一个问题，因为AudioMediaRecorder对象在创建后就超出了范围.如果您使其成为班级的成员，则将可以进行以下操作.

There was a problem because the AudioMediaRecorder object went out of scope just after it was created. If you make it a member of the class the following will work.

void SipCall::onCallMediaState(pj::OnCallMediaStateParam& /*prm*/)
{
   pj::CallInfo call_info = getInfo();
   pj::AudioMedia* audio_media = 0;
   for (unsigned int i = 0; i < call_info.media.size(); ++i) {
      if (call_info.media[i].type == PJMEDIA_TYPE_AUDIO) {
        audio_media = static_cast<pj::AudioMedia*>(getMedia(i));
        break;
      }
   }

   if (audio_media != 0) {
        try {    
            recorder.createRecorder("file.wav");
            audio_media->startTransmit(recorder);   
        }  
        catch (pj::Error& err) {
            qWarning("[SipAccount::onIncomingCall] : Failed to record call to %s. Error = %s", "file.wav", err.info().data());    
       }        
    }
 }

在下面的onCallState()方法中进行任何必要的清理:

Do any necessary cleanup in the onCallState() method below:

void SipCall::onCallState(pj::OnCallStateParam& prm)
{
    int i = prm.e.type;
    i = 0;

    pj::CallInfo call_info = getInfo();

    switch (call_info.state) {
       case PJSIP_INV_STATE_DISCONNECTED:
          // Add clean up code here
          delete this;        
          break;
       case PJSIP_INV_STATE_CONFIRMED:                        
          break;
       default:
          break;
   }
}

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