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</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>My session has one video and audio stream.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>In the audio stream’s doGetNextFrame(), I set the fPresentationTime like this:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>void AudioFrameSource::doGetNextFrame() {<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>CamerManager::GetInstance()->GetAudioFrame(</span><span style='font-family:宋体'>“</span><span lang=EN-US>test</span><span style='font-family:宋体'>”</span><span lang=EN-US>,(char*)fTo,fMaxSize,&fFrameSize,&fNumTruncatedBytes);<o:p></o:p></span></p><p class=MsoNormal style='text-indent:12.0pt'><span lang=EN-US>if (fIsFirstPresentationTime) {<o:p></o:p></span></p><p class=MsoNormal style='text-indent:12.0pt'><span lang=EN-US>CameraManager::GetInstance()->GetTimeScale(&m_timescale);<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span class=apple-tab-span><span lang=EN-US style='color:#1F497D'> </span></span><span class=apple-style-span><span lang=EN-US style='color:#1F497D'>fIsFirstPresentationTime = False; // from now on</span></span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US style='color:#1F497D'> </span></span><span lang=EN-US style='color:#1F497D'>}</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>fPresentationTime = m_timescale;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>fDurationInMicroseconds = 5000; // because 40 samples at 8000 samples-per-second have a duration of 5 ms (== 5000 us)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>// Compute the next presentation time (i.e., to be used on the next call to "doGetNextFrame()"):<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>m_timescale.tv_usec += fDurationInMicroseconds;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>if (m_timescale.tv_usec > 1000000) {<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>++m_timescale.tv_sec;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>m_timescale.tv_usec -= 1000000;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>In the videoFramesource I<i> set the same timestamp,</i><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>void VideoFrameSource::doGetNextFrame() {<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>CamerManager::GetInstance()->GetVideoFrame(</span><span style='font-family:宋体'>“</span><span lang=EN-US>test</span><span style='font-family:宋体'>”</span><span lang=EN-US>,(char*)fTo,fMaxSize,&fFrameSize,&fNumTruncatedBytes);<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>if (fIsFirstPresentationTime) {<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>CameraManager::GetInstance()->GetTimeScale(&m_timescale);<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US style='color:#1F497D'> </span></span><span class=apple-style-span><span lang=EN-US style='color:#1F497D'>fIsFirstPresentationTime = False; // from now on</span></span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US style='color:#1F497D'> </span></span><span lang=EN-US style='color:#1F497D'>}</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>fPresentationTime = m_timescale;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>fDurationInMicroseconds = 5000; // because 40 samples at 8000 samples-per-second have a duration of 5 ms (== 5000 us)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>// Compute the next presentation time (i.e., to be used on the next call to "doGetNextFrame()"):<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>m_timescale.tv_usec += fDurationInMicroseconds;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>if (m_timescale.tv_usec > 1000000) {<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>++m_timescale.tv_sec;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>m_timescale.tv_usec -= 1000000;<o:p></o:p></span></p><p class=MsoNormal><span class=apple-tab-span><span lang=EN-US> </span></span><span lang=EN-US>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>But unfortunately, I use vlc to access it, it can’t work correctly. If video is appear, then audio disappears. Otherwise, audio appears, video disappears.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>