Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-97730

Wrong QMediaPlayer::position when QMediaPlayer::videoOutput==NULL

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P2: Important P2: Important
    • 6.3.0 Alpha
    • 6.2.0, 6.2.1
    • Multimedia
    • None
    • Arch Linux with Qt 6.2 and multimedia handled by gstreamer (Arch packages "gst-plugins-good" and "gst-libav")
    • Linux/Wayland, Linux/X11
    • a95ff0c8b84d770ea46b712d52c04eb5114e3b9f (qt/qtmultimedia/dev) e8d25ce6d89aad07314a21babbd6cbab14230ad8 (qt/qtmultimedia/6.2)

      Create a QMediaPlayer and connect it to a QAudioOutput. Do not connect it to a video output. The QMediaPlayer can still play a video file set with QMediaPlayer::setSource. However, QMediaPlayer::position reports wrong values.

      QMediaPlayer::position increases much faster than the real position until it reaches the video duration and remains constant.

      This problem occurs only when playing video files (mp4, webm, mov) without connecting the media player to a video output. When playing audio files (.wav, .flac) no such problem arises. The problem does not occur in Qt 5.15.2. Minimal code for reproducing the problem is attached.

        1. QMediaPlayer_position.tar.gz
          1 kB
        For Gerrit Dashboard: QTBUG-97730
        # Subject Branch Project Status CR V
        379248,3 Consume videoframes in sync with clock on fake video sink dev qt/qtmultimedia Status: MERGED +2 0
        379363,2 Consume videoframes in sync with clock on fake video sink 6.2 qt/qtmultimedia Status: MERGED +2 0

            piotr Piotr Srebrny (Inactive)
            valentinb Valentin B
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes