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  1. Qt
  2. QTBUG-115308

Fix DirectX texture propagation from FFMPEG to RHI

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Details

    • Windows
    • 3363496a7 (dev), a3bf450b2 (6.7), 4043d7ebc (6.6), 582bf926b (tqtc/lts-6.5), 10ba74ebc (dev), a25b5eafc (6.7), fd893ee8d (6.6), ca9a5fb53 (tqtc/lts-6.5), 1e3e0fac0 (dev), c6880ff17 (6.7), b6138a0f4 (6.6), bee1f5510 (tqtc/lts-6.5), d9a38a71b (dev)
    • Multimedia wk 15-16

    Description

      Enabling FFMPEG HW texture conversion with media player on Windows causes stuttering playback as demonstrated in QTBUG-113832, QTBUG-111543, QTBUG-111911, QTBUG-111459, and QTBUG-109213.

      HW texture conversion was therefore disabled for the Windows platform in Fix stuttering video playback and AMD GPU crash on Windows (I12807994) · Gerrit Code Review (qt-project.org)

      To reduce the CPU and GPU load during video playback we should still investigate how we can re-enable HW texture conversion during video playback.

      We have discovered that during video playback with DirectX 11 backend, FFMPEG allocates a frame pool using a fixed size texture array to enable multi-threaded decoding. Unfortunately we have not found a good mechanism to synchronize reading frames from this pool. This means that frames may get overwritten before they are being displayed. 

      The task is to understand how we can prevent overwriting frames in the FFMPEG frame pool before they are displayed, and implement a fix for this. Once this works, we can revert the change in Fix stuttering video playback and AMD GPU crash on Windows (I12807994) · Gerrit Code Review (qt-project.org)

       

      Attachments

        1. memory.png
          249 kB
          Elias Steurer
        2. Horde 1980.zip
          7.27 MB
          Elias Steurer

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111911 Some videos has artifacts when playing in MediaPlayer.

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-113832 6.5.1 Qt MM crashes when playing a simple mp4 on AMD cards

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-109213 Video flickering when there is a ParticleSystem component or playing some animation at same time

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111459 Heavy jittering in video playback if animations are active

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111543 Heavy flickering with 60 fps videos

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111544 Video shows green strip at bottom

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-111815 Bumpy rendering of D3D11 textures

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-114778 Reg->6.3.2/Windows: QMediaPlayer shows green bar; status out of sync

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-115637 AMD Memory leak during FFMPEG media playback on Windows

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-113627 D3D11 Removing Device on QVideoSink save frame

          • 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-124239 MediaPlayer QML cannot normally play wmv file

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-123967 QML media player example project fails to play AV1 encoded videos.

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              johanseg Jøger Hansegård
              johanseg Jøger Hansegård
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              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

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