SUMMARY STEPS TO REPRODUCE 1. start digikam 6.0.0 b2 2. let it scan a folder containg this video 3. crash once scanner reaches video-file OBSERVED RESULT crash EXPECTED RESULT ignore damaged file and continue scanning SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 28 KDE Plasma Version: KDE Frameworks Version: Qt Version: 5.13.5-1.fc28.x86_64 ADDITIONAL INFORMATION console output: Digikam::MetaEngine::Private::printExiv2ExceptionError: Cannot load metadata from file (Error # 11 : /raid/fotky/_2_process/2011/2011-08-14 - autocopy/2011-08-13_12-33-53_raw.avi: The file contains data of an unknown image type Digikam::DMetadata::loadUsingFFmpeg: Parse metadada with FFMpeg: "/raid/fotky/_2_process/2011/2011-08-14 - autocopy/2011-08-13_12-33-53_raw.avi" /tmp/.mount_digikab9MDfR/AppRun: riadok 115: 25892 Chyba segmentácie (bol uložený výpis pamäte) digikam $@ PS: The video file cannot be played with mpv nor vlc on my system. 700MB : https://drive.google.com/open?id=136a1Z8nPQZgpvM710J5jBJCsk4o65Z7D PSS: I have quite many damaged video files in my folder. Unfortunately, digikam crashed after a long scanning time and I have to start all over after removing that file :(
Perhaps we can wrap ffmpeg library call in video metadata wrapper with C++ exception handling. After all, this code run in separated thread, so we can certainly limit the crash to the thread by this way. I recommend also to try to open this file with ffmpeg. Something like ffmpeg -i 'file' is used inside digiKam to get the metadata. If this command line crash, so, ffmpeg must be consolidated. If not, so there is a possible mechanism to back-port in digiKam to prevent this kind of crash. Best Gilles Caulier
this is the result of ffmpeg parser : [gilles@localhost Téléchargements]$ ffmpeg -i 2011-08-13_12-33-53_raw.avi ffmpeg version 3.3.8 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 5.5.0 (Mageia 5.5.0-1.mga6) configuration: --prefix=/usr --enable-shared --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include --disable-stripping --enable-postproc --enable-gpl --enable-pthreads --enable-libtheora --enable-libvorbis --disable-encoder=vorbis --enable-libvpx --enable-runtime-cpudetect --enable-libdc1394 --enable-libschroedinger --enable-librtmp --enable-libspeex --enable-libfreetype --enable-libnut --enable-libgsm --enable-libcelt --enable-libopus --enable-libopencv --enable-libopenjpeg --enable-libtwolame --enable-libxavs --enable-frei0r --enable-libmodplug --enable-libass --enable-gnutls --enable-libcdio --enable-libpulse --enable-libv4l2 --enable-avresample --enable-opencl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-libx264 --enable-libx265 --enable-libvo-amrwbenc --enable-libxvid libavutil 55. 58.100 / 55. 58.100 libavcodec 57. 89.100 / 57. 89.100 libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libavresample 3. 5. 0 / 3. 5. 0 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 libpostproc 54. 5.100 / 54. 5.100 [avi @ 0x7bba40] Could not find codec parameters for stream 0 (Video: none (422P / 0x50323234), none, 1280x720, 362647 kb/s): unknown codec Consider increasing the value for the 'analyzeduration' and 'probesize' options Input #0, avi, from '2011-08-13_12-33-53_raw.avi': Metadata: encoder : MEncoder SVN-1.rc4.0.r31086.3plf2010.1-4.4.3 Duration: 00:00:17.00, start: 0.000000, bitrate: 361765 kb/s Stream #0:0: Video: none (422P / 0x50323234), none, 1280x720, 362647 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 24 tbn, 24 tbc At least one output file must be specified ==> no crash
I think the problem is not reall relevant of ffmpeg lib : digikam.database: Finishing took 0 ms digikam.metaengine: Parse metadada with FFMpeg: "/mnt/data/photos/TESTS/2011-08-13_12-33-53_raw.avi" Thread 5 "Digikam::ScanCo" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc35ef700 (LWP 19737)] 0x00007ffff6122f38 in Digikam::DMetadata::loadUsingFFmpeg (this=0x7fffb80faf30, filePath=...) at /mnt/devel/GIT/6.x/core/libs/metadataengine/dmetadata/dmetadata_video.cpp:384 384 QString::fromUtf8(avcodec_descriptor_get_by_name(cname)->long_name)); Missing separate debuginfos, use: debuginfo-install breeze-5.12.2-1.mga6.x86_64 kimageformats-5.42.0-2.mga6.x86_64 lib64alsa2-1.1.4.1-1.mga6.x86_64 lib64ass9-0.13.6-1.mga6.x86_64 lib64astro1-17.12.2-1.1.mga6.x86_64 lib64asyncns0-0.8-9.mga6.x86_64 lib64attica5-5.42.0-1.mga6.x86_64 lib64avcodec57-3.3.8-1.mga6.tainted.x86_64 lib64avfilter6-3.3.8-1.mga6.tainted.x86_64 lib64avformat57-3.3.8-1.mga6.tainted.x86_64 lib64avresample3-3.3.8-1.mga6.tainted.x86_64 lib64avutil55-3.3.8-1.mga6.tainted.x86_64 lib64blkid1-2.28.2-2.1.mga6.x86_64 lib64bsd0-0.8.3-1.mga6.x86_64 lib64bzip2_1-1.0.6-10.mga6.x86_64 lib64cdio-paranoia2-10.2.0.93.1-8.mga6.x86_64 lib64cdio16-0.94-1.1.mga6.x86_64 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lib64xcb-util-keysyms1-0.4.0-3.mga6.x86_64 lib64xcb-util-renderutil0-0.3.9-4.mga6.x86_64 lib64xcb-util1-0.4.0-2.mga6.x86_64 lib64xcb-xfixes0-1.12-2.mga6.x86_64 lib64xcb-xinerama0-1.12-2.mga6.x86_64 lib64xcb-xkb1-1.12-2.mga6.x86_64 lib64xcb1-1.12-2.mga6.x86_64 lib64xcomposite1-0.4.4-8.mga6.x86_64 lib64xcursor1-1.1.14-6.2.mga6.x86_64 lib64xdamage1-1.1.4-8.mga6.x86_64 lib64xdmcp6-1.1.2-5.mga6.x86_64 lib64xext6-1.3.3-4.mga6.x86_64 lib64xfixes3-5.0.3-1.mga6.x86_64 lib64xi6-1.7.9-1.mga6.x86_64 lib64xkbcommon0-0.8.2-1.mga6.x86_64 lib64xml2_2-2.9.7-1.mga6.x86_64 lib64xrender1-0.9.10-1.mga6.x86_64 lib64xshmfence1-1.2-2.mga6.x86_64 lib64xslt1-1.1.29-6.mga6.x86_64 lib64xv1-1.0.11-1.mga6.x86_64 lib64xvidcore4-1.3.4-3.mga6.tainted.x86_64 lib64xxf86vm1-1.1.4-2.mga6.x86_64 lib64zlib1-1.2.11-4.1.mga6.x86_64 libgcc1-5.5.0-1.mga6.x86_64 libstdc++6-5.5.0-1.mga6.x86_64 plasma-integration-5.12.2-1.mga6.x86_64 qtbase5-common-5.9.4-1.1.mga6.x86_64 qtimageformats5-5.9.4-1.mga6.x86_64 (gdb) bt #0 0x00007ffff6122f38 in Digikam::DMetadata::loadUsingFFmpeg(QString const&) (this=0x7fffb80faf30, filePath=...) at /mnt/devel/GIT/6.x/core/libs/metadataengine/dmetadata/dmetadata_video.cpp:384 #1 0x00007ffff613253f in Digikam::DMetadata::load(QString const&) (this=0x7fffb80faf30, filePath=...) at /mnt/devel/GIT/6.x/core/libs/metadataengine/dmetadata/dmetadata_fileio.cpp:71 #2 0x00007fffe7af5429 in Digikam::ItemScanner::loadFromDisk() (this=0x7fffc35ee838) at /mnt/devel/GIT/6.x/core/libs/database/item/scanner/itemscanner.cpp:128 #3 0x00007fffe7afbe69 in Digikam::ItemScanner::newFile(int) (this=0x7fffc35ee838, albumId=1030) at /mnt/devel/GIT/6.x/core/libs/database/item/scanner/itemscanner_database.cpp:106 #4 0x00007fffe7a2e34d in Digikam::CollectionScanner::scanNewFile(QFileInfo const&, int) (this=0x7fffc35eecd0, info=..., albumId=1030) at /mnt/devel/GIT/6.x/core/libs/database/collection/collectionscanner_scan.cpp:847 #5 0x00007fffe7a2d3b6 in Digikam::CollectionScanner::scanAlbum(Digikam::CollectionLocation const&, QString const&) (this=0x7fffc35eecd0, location=..., album=...) at /mnt/devel/GIT/6.x/core/libs/database/collection/collectionscanner_scan.cpp:655 #6 0x00007fffe7a2c106 in Digikam::CollectionScanner::scanAlbumRoot(Digikam::CollectionLocation const&) (this=0x7fffc35eecd0, location=...) at /mnt/devel/GIT/6.x/core/libs/database/collection/collectionscanner_scan.cpp:429 #7 0x00007fffe7a2a64f in Digikam::CollectionScanner::completeScan() (this=0x7fffc35eecd0) at /mnt/devel/GIT/6.x/core/libs/database/collection/collectionscanner_scan.cpp:87 #8 0x00007ffff72cd5e6 in Digikam::ScanController::run() (this=0x7ffff7ddaca0 <_ZZN7Digikam12_GLOBAL__N_113Q_QGS_creator13innerFunctionEvE6holder>) at /mnt/devel/GIT/6.x/core/libs/database/utils/scan/scancontroller.cpp:236 #9 0x00007fffe83e4eea in QThreadPrivate::start(void*) () at /usr/lib64/qt5/../libQt5Core.so.5 #10 0x00007ffff505966d in start_thread () at /usr/lib64/qt5/../libpthread.so.0 #11 0x00007fffe583ae0d in clone () at /usr/lib64/qt5/../libc.so.6 (gdb) ... as the crash do not jump in-deep in ffmpeg lib as you can see... Gilles Caulier
I think that problem is simple in fact : https://cgit.kde.org/digikam.git/tree/core/libs/metadataengine/dmetadata/dmetadata_video.cpp#n384 From this method we ask to ffmpeg to return the codec used in video file. Fffmpeg cannot found the relevant codec as we can see from the CLI debug trace. So the string pointer returned by ffmpeg must be null and we pass it to QString parser, which do not like it. I think it miss a check of pointer validity... Gilles Caulier
Git commit 762b186d8de774478af7a07ceb5118d98780cc3f by Maik Qualmann. Committed on 02/12/2018 at 12:13. Pushed by mqualmann into branch 'master'. fix crash in FFmpeg parser and video thumbnail decoder M +15 -6 core/libs/metadataengine/dmetadata/dmetadata_video.cpp M +5 -1 core/libs/threadimageio/video/videodecoder.cpp M +6 -3 core/libs/threadimageio/video/videodecoder_p.cpp M +1 -1 core/libs/threadimageio/video/videodecoder_p.h https://commits.kde.org/digikam/762b186d8de774478af7a07ceb5118d98780cc3f
We still have a crash trying to play the video with me QtAV, let's see if we can prevent it. Maik
Git commit 3a66fae4563436501396bc6a12f49b6726dc1626 by Maik Qualmann. Committed on 02/12/2018 at 13:27. Pushed by mqualmann into branch 'master'. fix possible crashes with damaged video files FIXED-IN: 6.0.0 M +2 -1 NEWS M +14 -0 core/libs/metadataengine/dmetadata/dmetadata_video.cpp M +14 -3 core/utilities/assistants/videoslideshow/player/mediaplayerview.cpp M +12 -2 core/utilities/slideshow/slidevideo.cpp https://commits.kde.org/digikam/3a66fae4563436501396bc6a12f49b6726dc1626