使用QT中的QProcess启动gst-launch 没有响应

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小蘭|

楼主 | 2018-8-31 20:04 | 只看该作者回帖奖励

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PROCESS, ST, Launch, stream, 4G

我是linux3.05的内核，用的qt4.8.5版本，在使用QProcess启动gst-launch程序时始终没有响应，没有任何输出，就像是跳过了这一步，有没有哪位大神知道原因

QString strMsg;

QString strGStreamer(&quot;gst-launch&quot;);

char* pstrMsg;

QStringList strListArg4GStreamer;

//strListArg4GStreamer <<&quot;-ve&quot;;

strListArg4GStreamer <<&quot;v4l2src device=/dev/video2&quot;;

//strListArg4GStreamer <<&quot;device=/dev/video2&quot;;

strListArg4GStreamer <<&quot;!&quot;;

strListArg4GStreamer <<&quot;'video/x-raw-yuv, format=(fourcc)UYVY'&quot;;

strListArg4GStreamer <<&quot;!&quot;;

strListArg4GStreamer <<&quot;mfw_isink&quot;;

strListArg4GStreamer <<&quot;disp-width=1000&quot;;

strListArg4GStreamer <<&quot;disp-height=800&quot;;

strListArg4GStreamer <<&quot;axis-left=16&quot;;

//strListArg4GStreamer <<QString::number((ui->LIVE->winId()));

//strListArg4GStreamer <<&quot;--help&quot;;

strMsg = strGStreamer+&quot; &quot;;

strMsg += strListArg4GStreamer.join(&quot; &quot;); // std output

strMsg = &quot;INFO: GStreamer argument:&quot;+strMsg+&quot;\n&quot;;

QByteArray ba=strMsg.toLatin1();

pstrMsg=ba.data();

printf(pstrMsg);

//m_qMplayerProcess = new QProcess(ui->LIVE);

if(NULL == m_qMplayerProcess){

printf(&quot;Err: QProcess error\n&quot;);

}

m_qMplayerProcess = new QProcess(ui->LIVE);

//m_qMplayerProcess->setProcessChannelMode(QProcess::MergedChannels);

m_qMplayerProcess->start(strGStreamer,strListArg4GStreamer);

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