QtAV is a media playing library based on Qt and FFmpeg.
F: fullscreen on/off
T: stays on top on/off
N: show next frame. Continue the playing by pressing "Space"
O: open a file
M: mute on/off
Up: volume +
Down: volume -
->: seek forward
<-: seek backward
or qmake (BUILD_DIR is $PWD/out)
or cd build_dir ; qmake /path/to/QtAV.pro
The binaries is in $BUILD_DIR/bin