The Basics
- Nextcloud Server version (e.g., 29.x.x):
Nextcloud Hub 10 (31.0.5)
- Operating system and version (e.g., Ubuntu 24.04):
Ubuntu 24.04.2 LTS
- Web server and version (e.g, Apache 2.4.25):
Apache/2.4.58
- Reverse proxy and version _(e.g. nginx 1.27.2)
nope
- PHP version (e.g, 8.3):
8.3
- Is this the first time you’ve seen this error? (Yes / No):
Nope
- When did this problem seem to first start?
Long time ago
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
Bare metal, directly under Ubuntu, I'm not using snap version
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
Cloudflare for tunneling, but it isn't related to this problem
Summary of the issue you are facing:
Peview Generator refueses to make thumbnails for videos from Samsung (any android version) phones
Steps to replicate it (hint: details matter!):
- Record any video with Samsung
- Upload it to Nextcloud
- No profit - go to Memories app and not get any thumbnail for uploaded video. Of course this video can be played without any problem in Nextcloud, it’s just a problem with thumbnail.
Log entries
Nextcloud
In Generator.php line 366:
[OCP\Files\NotFoundException]
No provider successfully handled the preview generation
Exception trace:
at /var/www/nextcloud/lib/private/Preview/Generator.php:366
OC\Preview\Generator->generateProviderPreview() at /var/www/nextcloud/lib/private/Preview/Generator.php:313
OC\Preview\Generator->getMaxPreview() at /var/www/nextcloud/lib/private/Preview/Generator.php:117
OC\Preview\Generator->generatePreviews() at /var/www/nextcloud/lib/private/PreviewManager.php:182
OC\PreviewManager->generatePreviews() at /var/www/nextcloud/core/Command/Preview/Generate.php:92
OC\Core\Command\Preview\Generate->execute() at /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php:326
Symfony\Component\Console\Command\Command->run() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:1078
Symfony\Component\Console\Application->doRunCommand() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:324
Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:175
Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:187
OC\Console\Application->run() at /var/www/nextcloud/console.php:87
require_once() at /var/www/nextcloud/occ:33
preview:generate [-s|--size SIZE] [-c|--crop] [-m|--mode MODE] [--] <file>
Additionally, information about files that worked/ didn’t work with Preview Generator
File that worked:
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 18.0 MiB
Duration : 7 s 280 ms
Overall bit rate : 20.7 Mb/s
Frame rate : 30.051 FPS
Encoded date : 2025-06-09 21:22:56 UTC
Tagged date : 2025-06-09 21:22:56 UTC
Writing operating system : Google Android 15
Writing hardware : motorola edge 50 ultra
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 7 s 188 ms
Bit rate : 20.3 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 30.051 FPS
Minimum frame rate : 27.916 FPS
Maximum frame rate : 32.491 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.325
Stream size : 17.4 MiB (97%)
Title : VideoHandle
Language : English
Encoded date : 2025-06-09 21:22:56 UTC
Tagged date : 2025-06-09 21:22:56 UTC
Color range : Full
colour_range_Original : Limited
Color primaries : BT.601 PAL
colour_primaries_Original : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.601
matrix_coefficients_Original : BT.709
mdhd_Duration : 7188
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 7 s 280 ms
Source duration : 7 s 211 ms
Bit rate mode : Constant
Nominal bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Source stream size : 225 KiB (1%)
Title : SoundHandle
Language : English
Encoded date : 2025-06-09 21:22:56 UTC
Tagged date : 2025-06-09 21:22:56 UTC
mdhd_Duration : 7280
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 71.7 MiB
Duration : 34 s 802 ms
Overall bit rate mode : Variable
Overall bit rate : 17.3 Mb/s
Frame rate : 30.000 FPS
Encoded date : 2018-04-22 10:47:09 UTC
Tagged date : 2018-04-22 10:47:09 UTC
Writing operating system : Google Android 7.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Constrained Baseline@L4
Format settings : 1 Ref Frames
Format settings, CABAC : No
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=31
Format settings, Slice count : 2 slices per frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 34 s 802 ms
Source duration : 34 s 817 ms
Bit rate mode : Variable
Bit rate : 17.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 30.000 FPS
Minimum frame rate : 21.062 FPS
Maximum frame rate : 39.982 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.273
Stream size : 70.6 MiB (98%)
Source stream size : 70.6 MiB (98%)
Title : VideoHandle
Language : English
Encoded date : 2018-04-22 10:47:09 UTC
Tagged date : 2018-04-22 10:47:09 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 34802
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 34 s 731 ms
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 814 KiB (1%)
Title : SoundHandle
Language : English
Encoded date : 2018-04-22 10:47:09 UTC
Tagged date : 2018-04-22 10:47:09 UTC
mdhd_Duration : 34731
Files that didn’t work:
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 88.8 MiB
Duration : 1 min 0 s
Overall bit rate : 12.2 Mb/s
Frame rate : 29.891 FPS
Encoded date : 2025-06-07 18:16:24 UTC
Tagged date : 2025-06-07 18:16:24 UTC
Recorded location :
Writing operating system : Google Android 15
Writing hardware : Samsung Galaxy S25 (SM-S931B)
com.android.video.temporal_layers_count : Unknown kind of value!
com.samsung.android.utc_offset : +0200
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L4@Main
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 1 min 0 s
Source duration : 1 min 0 s
Bit rate : 12.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Rotation : 180°
Frame rate mode : Variable
Frame rate : 29.891 FPS
Minimum frame rate : 15.005 FPS
Maximum frame rate : 33.645 FPS
Real frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.193
Stream size : 86.9 MiB (98%)
Source stream size : 86.9 MiB (98%)
Title : VideoHandle
Language : English
Encoded date : 2025-06-07 18:16:24 UTC
Tagged date : 2025-06-07 18:16:24 UTC
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : HLG
Matrix coefficients : BT.2020 non-constant
mdhd_Duration : 60989
Codec configuration box : hvcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 min 0 s
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 1.86 MiB (2%)
Title : SoundHandle
Language : English
Encoded date : 2025-06-07 18:16:24 UTC
Tagged date : 2025-06-07 18:16:24 UTC
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 29.4 MiB
Duration : 20 s 45 ms
Overall bit rate : 12.3 Mb/s
Frame rate : 29.970 FPS
Encoded date : 2025-06-09 20:48:58 UTC
Tagged date : 2025-06-09 20:48:58 UTC
Writing operating system : Google Android 15
Writing hardware : Samsung Galaxy S25 (SM-S931B)
com.samsung.android.utc_offset : +0200
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 20 s 45 ms
Bit rate : 12.0 Mb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.970 (29970/1000) FPS
Minimum frame rate : 19.235 FPS
Maximum frame rate : 30.020 FPS
Real frame rate : 30.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.436
Stream size : 28.8 MiB (98%)
Title : VideoHandle
Language : English
Encoded date : 2025-06-09 20:48:58 UTC
Tagged date : 2025-06-09 20:48:58 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 20045
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 20 s 32 ms
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 626 KiB (2%)
Title : SoundHandle
Language : English
Encoded date : 2025-06-09 20:48:58 UTC
Tagged date : 2025-06-09 20:48:58 UTC
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 40.5 MiB
Duration : 19 s 662 ms
Overall bit rate : 17.3 Mb/s
Frame rate : 30.000 FPS
Encoded date : 2023-06-21 19:18:51 UTC
Tagged date : 2023-06-21 19:18:51 UTC
Writing operating system : Google Android 13
Writing hardware : Samsung SM-G990B2
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 19 s 662 ms
Bit rate : 17.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Rotation : 90°
Frame rate mode : Variable
Frame rate : 30.000 FPS
Minimum frame rate : 29.278 FPS
Maximum frame rate : 30.822 FPS
Real frame rate : 30.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.273
Stream size : 39.8 MiB (98%)
Title : VideoHandle
Language : English
Encoded date : 2023-06-21 19:18:51 UTC
Tagged date : 2023-06-21 19:18:51 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 19 s 632 ms
Source duration : 19 s 605 ms
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 613 KiB (1%)
Source stream size : 613 KiB (1%)
Title : SoundHandle
Language : English
Encoded date : 2023-06-21 19:18:51 UTC
Tagged date : 2023-06-21 19:18:51 UTC
mdhd_Duration : 19632
Configuration
Nextcloud
<?php
$CONFIG = array (
'instanceid' => 'redacted',
'passwordsalt' => ''redacted',
'secret' => 'redacted',
'trusted_domains' =>
array (
0 => 'redacted',
1 => '192.168.1.x',
),
'datadirectory' => '/media/data/nextcloud/',
'dbtype' => 'mysql',
'version' => '31.0.5.1',
'overwrite.cli.url' => 'https://192.168.1.x',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'redacted',
'dbpassword' => 'redacted',
'installed' => true,
'maintenance' => false,
'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
'theme' => '',
'loglevel' => 2,
'twofactor_enforced' => 'false',
'twofactor_enforced_groups' =>
array (
),
'twofactor_enforced_excluded_groups' =>
array (
),
'defaultapp' => 'memories,files,dashboard',
'memories.exiftool' => '/var/www/nextcloud/apps/memories/bin-ex> 'memories.vod.path' => '/var/www/nextcloud/apps/memories/bin-ex> 'enabledPreviewProviders' =>
array (
0 => 'OC\\Preview\\Movie',
1 => 'OC\\Preview\\TIFF',
2 => 'OC\\Preview\\Image',
3 => 'OC\\Preview\\HEIC',
),
'preview_max_memory' => 5120,
'skeletondirectory' => '',
'memories.vod.ffmpeg' => '/usr/bin/ffmpeg',
'memories.vod.ffprobe' => '/usr/bin/ffprobe',
'memories.video_default_quality' => '-1',
'preview_max_filesize_image' => 10240,
'memcache.local' => '\\OC\\Memcache\\APCu',
'app_install_overwrite' =>
array (
0 => 'video_converter',
1 => 'files_rightclick',
),
'maintenance_window_start' => 23,
'memories.db.triggers.fcu' => true,
'preview_max_x' => 4096,
'preview_max_y' => 4096,
);
Apps
Enabled:
- activity: 4.0.0
- app_api: 5.0.2
- bruteforcesettings: 4.0.0
- circles: 31.0.0
- cloud_federation_api: 1.14.0
- comments: 1.21.0
- dashboard: 7.11.0
- dav: 1.33.0
- federatedfilesharing: 1.21.0
- federation: 1.21.0
- files: 2.3.1
- files_downloadlimit: 4.0.0
- files_external: 1.23.0
- files_pdfviewer: 4.0.0
- files_reminders: 1.4.0
- files_sharing: 1.23.1
- files_trashbin: 1.21.0
- files_versions: 1.24.0
- firstrunwizard: 4.0.0
- ldap_write_support: 1.13.0
- logreader: 4.0.0
- lookup_server_connector: 1.19.0
- memories: 7.5.2
- nextcloud_announcements: 3.0.0
- notifications: 4.0.0
- oauth2: 1.19.1
- password_policy: 3.0.0
- photos: 4.0.0-dev.1
- previewgenerator: 5.8.0
- privacy: 3.0.0
- profile: 1.0.0
- provisioning_api: 1.21.0
- recommendations: 4.0.0
- related_resources: 2.0.0
- serverinfo: 3.0.0
- settings: 1.14.0
- survey_client: 3.0.0
- suspicious_login: 9.0.1
- systemtags: 1.21.1
- text: 5.0.0
- theming: 2.6.1
- theming_customcss: 1.18.0
- twofactor_backupcodes: 1.20.0
- updatenotification: 1.21.0
- user_ldap: 1.22.0
- viewer: 4.0.0
- webhook_listeners: 1.2.0
- workflow_media_converter: 1.13.5
- workflowengine: 2.13.0
Disabled:
- admin_audit: 1.21.0
- contactsinteraction: 1.12.0 (installed 1.9.0)
- encryption: 2.19.0
- files_rightclick: 0.15.1 (installed 0.15.1)
- files_scripts: 4.1.0 (installed 4.0.3)
- sharebymail: 1.21.0 (installed 1.18.0)
- support: 3.0.0 (installed 1.11.0)
- twofactor_nextcloud_notification: 5.0.0
- twofactor_totp: 13.0.0-dev.0
- user_status: 1.11.0 (installed 1.8.1)
- video_converter: 1.0.6 (installed 1.0.6)
- weather_status: 1.11.0 (installed 1.8.0)
- workflow_script: 2.0.0 (installed 2.0.0)
###ffmpeg
ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers
built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04)
configuration: --disable-decoder=amrnb --disable-gnutls --disable-liblensfun --disable-libopencv --disable-podpages --disable-sndio --disable-stripping --enable-avfilter --enable-chromaprint --enable-frei0r --enable-gcrypt --enable-gpl --enable-ladspa --enable-libaom --enable-libaribb24 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libdvdnav --enable-libdvdread --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libharfbuzz --enable-libiec61883 --enable-libjack --enable-libjxl --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse --enable-librabbitmq --enable-librist --enable-librsvg --enable-librubberband --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-nonfree --enable-openal --enable-opencl --enable-opengl --enable-openssl --enable-postproc --enable-pthreads --enable-shared --enable-version3 --incdir=/usr/include/x86_64-linux-gnu --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --toolchain=hardened --enable-vaapi --enable-libvpl --enable-libxavs2 --enable-libdavs2 --enable-libvmaf --enable-librav1e --enable-libvvenc --enable-libilbc --enable-libklvanc --enable-libfdk-aac --enable-libkvazaar --enable-omx --cc=x86_64-linux-gnu-gcc --cxx=x86_64-linux-gnu-g++ --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
libavutil 59. 39.100 / 59. 39.100
libavcodec 61. 19.101 / 61. 19.101
libavformat 61. 7.100 / 61. 7.100
libavdevice 61. 3.100 / 61. 3.100
libavfilter 10. 4.100 / 10. 4.100
libswscale 8. 3.100 / 8. 3.100
libswresample 5. 3.100 / 5. 3.100
libpostproc 58. 3.100 / 58. 3.100
Any ideas? I’m starting to loose ideas what’s difference here and why Preview Generator isn’t happy trying to use these files.
