Open customized video file

[cass]

Hi

I would like to use my own customized QIODevice to open a video file in QT using Phonon. This should theoretically allow me to play specially encrypted video files. I noticed that MediaSource ( QIODevice * ioDevice ) can take an QIODevice and as a test I tried a basic QFile as a source.

VideoPlayer* video = new VideoPlayer(Phonon::VideoCategory);
 
main->setWidget(video); // My own class that puts the VideoPlayer on the window at the correct position.
 
QFile* f = new QFile("data/myvideo.MP4");
if (f->open(QIODevice::ReadOnly))
{
  video->play(MediaSource(f));
}

VideoPlayer* video = new VideoPlayer(Phonon::VideoCategory);

main->setWidget(video); // My own class that puts the VideoPlayer on the window at the correct position.

QFile* f = new QFile("data/myvideo.MP4");
if (f->open(QIODevice::ReadOnly))
{
  video->play(MediaSource(f));
}

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When I debug the code, the file opens successfully, but I only get a "black box" with no video or audio.

When I replace MediaSource(f) with MediaSource("data/myvideo.MP4"), it works but I would like to be able to modify (decrypt) the stream before it get send to the VideoPlayer.

Any ideas?