| Summary: | Video thumbnails not created on OS X (Linux works fine since 5.3) | ||
|---|---|---|---|
| Product: | [Applications] digikam | Reporter: | Jens <jens-bugs.kde.org> |
| Component: | Thumbs-Video | Assignee: | Digikam Developers <digikam-bugs-null> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | caulier.gilles, evandro.boeing |
| Priority: | NOR | ||
| Version: | 5.3.0 | ||
| Target Milestone: | --- | ||
| Platform: | macOS (DMG) | ||
| OS: | macOS | ||
| Latest Commit: | Version Fixed In: | 5.4.0 | |
| Sentry Crash Report: | |||
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Description
Jens
2016-11-14 20:33:30 UTC
It's not It's not a bug, it's a limitation of Qt5::Multimedia under OSX and Windows, which cannot do extract video frames. Alternative to process video frame extraction can be done with OpenCV library, also used by digiKam : http://stackoverflow.com/questions/30800772/how-to-grab-video-frames-in-qt Gilles Caulier OK thank you :) do you have any plans to do this in the near future? It's diffcult to judge, but at least we can give a clear state: 1/ Qt5::Multimedia framework do not give the same results on OSX and Windows compared to Linux. 2/ Qt5::Multimedia framework under Linux use GStreamer codec in background under Linux, which is a huge pain for end users. GStreamer is insoluble puzzle with a lots of run-time dependencies. I tried to bundle it in AppImage for 5.3.0. Result, i lost one week only on this topic. This do not work ! 3/ Qt5::Multimedia framework under OSX and Windows require extra codec. Why??? 4/ Possible solution is to use ffmpeg backend + a Qt5 interface. Some project already exist but are complex or not finalized or use OpenGL for video. OPenGL is another pain, especialy uner Linux. So not at all... 5/ Another solution is OpenCV. But i'm not yet sure about the low level backend used to decode video. OpenCV is another big puzzle, complex to solve. 6/ Write a Qt5::framework plugin to use ffmpeg. I don't found something somewhere yet on the web... This will be my preferred way, but it's require investigation and time. Gilles Caulier *** Bug 370228 has been marked as a duplicate of this bug. *** Git commit 32ebb7dff83b03cfad91cbe89de252b1f62bdd6e by Gilles Caulier. Committed on 11/12/2016 at 12:02. Pushed by cgilles into branch 'master'. digiKam embeded mediaplayer is now based on QtAV/ffmpeg instead Qt5Multimedia. TODO: - handle video rotation flag with new Exiv2 0.26 to autorotate media in player. - port video thumbnailer to QtAV. - port Presentation audio player to QtAV. - remove Qt5Multimedia dependency. For later: - play video into slideshow tool. - port old videoslideshow tool to QtAv Related: bug 373272, bug 271751, bug 361829, bug 159824, bug 329854 M +12 -6 CMakeLists.txt M +3 -2 app/CMakeLists.txt M +40 -38 app/views/mediaplayerview.cpp M +11 -8 app/views/mediaplayerview.h https://commits.kde.org/digikam/32ebb7dff83b03cfad91cbe89de252b1f62bdd6e Git commit ec50a8ad510e9fe6ded53f0632afd4ffbdf8ba47 by Gilles Caulier. Committed on 11/12/2016 at 16:37. Pushed by cgilles into branch 'master'. digiKam port to QtAV/ffmpeg instead Qt5Multimedia : port Presentation audio player to QtAV. TODO: - handle video rotation flag with new Exiv2 0.26 to autorotate media in player. - port video thumbnailer to QtAV. - remove Qt5Multimedia dependency. For later: - play video into slideshow tool. - port old videoslideshow tool to QtAv. Related: bug 271751, bug 361829, bug 159824, bug 329854 M +4 -5 app/CMakeLists.txt M +1 -1 app/views/mediaplayerview.cpp M +2 -2 app/views/mediaplayerview.h M +1 -5 utilities/presentation/CMakeLists.txt M +34 -24 utilities/presentation/audio/presentationaudiolist.cpp M +8 -5 utilities/presentation/audio/presentationaudiolist.h M +45 -27 utilities/presentation/audio/presentationaudiowidget.cpp M +9 -5 utilities/presentation/audio/presentationaudiowidget.h https://commits.kde.org/digikam/ec50a8ad510e9fe6ded53f0632afd4ffbdf8ba47 Git commit 193ecfd91745aab81c15ccf1a3889dc033ee7917 by Gilles Caulier. Committed on 11/12/2016 at 21:09. Pushed by cgilles into branch 'master'. digiKam port to QtAV/ffmpeg instead Qt5Multimedia : add video support into Slideshow. TODO: - handle video rotation flag with new Exiv2 0.26 to autorotate media in player. - port video thumbnailer to QtAV. - remove Qt5Multimedia dependency. For later: - port old videoslideshow tool to QtAv. Related: bug 159824, bug 271751, bug 361829, bug 329854 FIXED-IN: 5.4.0 M +8 -6 NEWS M +3 -3 app/views/mediaplayerview.cpp M +1 -1 app/views/mediaplayerview.h M +1 -0 utilities/slideshow/CMakeLists.txt M +68 -5 utilities/slideshow/slideshow.cpp M +3 -0 utilities/slideshow/slideshow.h A +227 -0 utilities/slideshow/slidevideo.cpp [License: GPL (v2+)] C +16 -51 utilities/slideshow/slidevideo.h [from: app/views/mediaplayerview.h - 050% similarity] https://commits.kde.org/digikam/193ecfd91745aab81c15ccf1a3889dc033ee7917 Next digiKam 5.4.0 will support de facto video format through QtAV framework, without to install extra video codec. We remove Qt5::Multimedia dependency in digiKam. Video thumbnails in action under MacOSX : https://www.flickr.com/photos/digikam/31679362466/in/dateposted-public/ Gilles Caulier |