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  1. Qt
  2. QTBUG-126799

[gstreamer] playback rate / seeking unreliable

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Details

    • Bug
    • Resolution: Unresolved
    • P2: Important
    • None
    • 6.8
    • Multimedia
    • Linux/X11
    • d25c2a210 (dev), c00fb53d4 (6.8), 6bcb78c9f (6.7), 5a7703301 (tqtc/lts-6.5), c5a085fbf (dev), e34ae705e (6.8), 227a3f202 (6.7), 1a5ab73b4 (tqtc/lts-6.5), 73ea8550a (dev), b65d639ba (6.8), f6558e390 (6.8.0), b63aede49 (6.7), 3a8f6da8b (tqtc/lts-6.5)

    Description

      setting playback rate, seeking, flushing pipeline is unreliable. we have a bunch of workarounds that don't work very reliable.

      related unit tests:
      tst_QMediaPlayerBackend::seekPauseSeek
      tst_QMediaPlayerBackend::multiplePlaybackRateChangingStressTest
      tst_QMediaPlayerBackend::multipleSeekStressTest
      tst_QMediaPlayerBackend::setPlaybackRate_changesActualRateAndFramesRenderingTime
      tst_QMediaPlayerBackend::playFromBuffer

      related to loop functionality (also see QTBUG-123056)
      tst_QMediaPlayerBackend::seekOnLoops
      tst_QMediaPlayerBackend::changeLoopsOnTheFly

      related to seek after EOS (also see QTBUG-127346)
      tst_QMediaPlayerBackend::subsequentPlayback_playsForExpectedDuration

      related to swapping sinks
      tst_QMediaPlayerBackend::setVideoOutput_doesNotStopPlayback (changing outputs flushes pipeline)
      tst_QMediaPlayerBackend::setAudioOutput_doesNotStopPlayback
      tst_QMediaPlayerBackend::swapAudioDevice_doesNotStopPlayback

      related upstream bugs:
      https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/3604
      https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/3545

      Attachments

        Issue Links

          depends on

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-127001 [gstreamer] seeking with pulseaudio broken

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-124372 After seeking using the GStreamer backend, the stream goes into a paused state.

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-127346 [gstreamer] QMediaPlayer: subsequent playback broken

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-129240 [Boot2Qt] The 'MediaPlayerApp' does not appear on the screen when running it on target device

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-123056 GStreamer: `setLoops` sometimes not working

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-124005 [gstreamer] unit tests are failing

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • In Progress

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-119567 [Boot2Qt] The audio track starts playing much faster when you fast forward it or rewind it using the progress bar

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-129469 Test #42: tst_qmediaplayerbackend ..........***Failed

          • P0: Blocker - MUST be fixed ASAP. This includes issues that prevent/block further Qt development; Legal issues & Serious data loss issues.
          • Closed
          For Gerrit Dashboard: QTBUG-126799
          # Subject Branch Project Status CR V
          591014,10 ubuntu: install pulseaudio 16 with time smoother bugfixes dev qt/qt5 Status: NEW 0 0
          562430,17 Tests: add simple playback test with loop and rate dev qt/qtmultimedia Status: MERGED +2 0
          562431,8 Tests: parameterize `finiteLoops` test dev qt/qtmultimedia Status: MERGED +2 0
          574717,2 Tests: parameterize `finiteLoops` test 6.8 qt/qtmultimedia Status: MERGED +2 0
          576177,3 Tests: parameterize `finiteLoops` test 6.7 qt/qtmultimedia Status: MERGED +2 0
          576560,2 Tests: parameterize `finiteLoops` test tqtc/lts-6.5 qt/tqtc-qtmultimedia Status: MERGED +2 0
          577577,2 Tests: add simple playback test with loop and rate 6.8 qt/qtmultimedia Status: MERGED +2 0
          577671,3 Tests: add simple playback test with loop and rate 6.7 qt/qtmultimedia Status: MERGED +2 0
          577957,3 Tests: add simple playback test with loop and rate tqtc/lts-6.5 qt/tqtc-qtmultimedia Status: MERGED +2 0
          590953,5 GStreamer: warn about pulseaudio v16 bugs and how to fix them dev qt/qtmultimedia Status: MERGED +2 0
          591286,2 GStreamer: warn about pulseaudio v16 bugs and how to fix them 6.8 qt/qtmultimedia Status: MERGED +2 0
          591422,2 GStreamer: warn about pulseaudio v16 bugs and how to fix them 6.8.0 qt/qtmultimedia Status: MERGED +2 0
          591423,3 GStreamer: warn about pulseaudio v16 bugs and how to fix them 6.7 qt/qtmultimedia Status: MERGED +2 0
          592744,3 GStreamer: warn about pulseaudio v16 bugs and how to fix them tqtc/lts-6.5 qt/tqtc-qtmultimedia Status: MERGED +2 0
          597704,1 ubuntu: install pulseaudio 16 with time smoother bugfixes dev qt/qt5 Status: ABANDONED 0 0

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              timblechmann tim blechmann
              timblechmann tim blechmann
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              Dates

                Created:
                Updated: