@SGaist
I found the solution in the mplayer's docs, the -wid not working in linuxfb environment. The qprocess started the mplayer who writes the framebuffer directly, it's working.
[SOLVED]
@mrjj
Thanks. It solved the problem. Actually i used the following code:
mplayerProcess->start("mplayer2 --slave --quiet input.mp4");
...
QByteArray command("pause 1\n");
mplayerProcess->write( command );
