Hello,
I am trying to figure out how I could add some text to a video I am playing
in a qt widget. I am trying to add some text to a video I am reading from
the frame 100 to 324.
Here is a part of my code :
void MainWindow::openVideo(){
QString fileName = QFileDialog::getOpenFileName(this);
if(!fileName.isNull()){
Mlt::Producer *producer = new Mlt::Producer(*m_profile,
fileName.toUtf8().constData());
if(producer->is_valid()){
m_playlist = new Mlt::Playlist();
m_playlist->append(*producer);
m_consumer->stop();
m_consumer->connect(*m_playlist);
delete m_producer;
m_producer = producer;
//*//Adding subtitle
Mlt::Producer *subTitleProducer = new Mlt::Producer(*m_profile, "color:");
char* subTitleData = "<kdenlivetitle width=\"1920\" height=\"1080\"
out=\"324\"><item z-index=\"0\" type=\"QGraphicsTextItem\"><position
x=\"220\" y=\"105.5555555555556\"> <transform>1,0,0,0,1,0,0,0,1</transform>
</position> <content font-color=\"255,0,0,255\"
font-outline-color=\"0,0,0,255\" font-pixel-size=\"100\" font-italic=\"0\"
font-underline=\"0\" font-weight=\"50\" font=\"Sans Serif\"
font-outline=\"0\">SOME TEXT THAT WILL BE SUBTITLES</content> </item>
<startviewport rect=\"0,0,1920,1080\"/> <endviewport
rect=\"0,0,1920,1080\"/> <background color=\"0,0,0,0\"/></kdenlivetitle>\"";
subTitleProducer->set("xmldata", subTitleData);
Mlt::Transition *transition = new Mlt::Transition(*m_profile, "Composite");
transition->connect(*m_playlist, 1, 0);
m_playlist->insert_at(100, subTitleProducer);
//*///End adding subtitle
m_consumer->start();
play();
}
fps = m_producer->get_fps();
}
// If file invalid, then on some platforms the dialog messes up SDL.
m_consumer->set ("refresh", 1);
}
You can see my entire code here :
http://code.google.com/p/testqtmlt/source/browse/trunk/08subtitleAndEncodage?spec=svn21&r=21
What I don't understand is how to connect a transition and especially what
are the integers a_track and b_track and if m_playlist->insert_at(100,
subTitleProducer); is the right thing to do.
Someone know how I could do it right ?
Thanks in advance,
Cédric
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