Clip proxy: drop data and subtitle streams

Related to #695

src/jobs/proxyclipjob.cpp

@@ -289,7 +289,7 @@ bool ProxyJob::startJob()
         }
 
         // Make sure we keep the stream order
-        parameters << QStringLiteral("-map") << QStringLiteral("0");
+        parameters << QStringLiteral("-sn") << QStringLiteral("-dn") << QStringLiteral("-map") << QStringLiteral("0");
         parameters << dest;
         qDebug()<<"/// FULL PROXY PARAMS:\n"<<parameters<<"\n------";
         m_jobProcess = new QProcess;