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Autres articles (32)
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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...)
Sur d’autres sites (5428)
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WebM live streaming via DASH
23 février 2017, par ewackI am following the instructions here to try to make WebM live streaming via DASH. My input is from an Axis camera and it is streaming as h264 encoding. I am using node to spin up the ffmpeg processes. I am able to create the .hdr file and the .chk files. The .mpd file is even created but it’s empty and I get an error saying :
Could not write header for output file #0 (incorrect codec parameters ?): Operation not permittedStream mapping: Stream #0:0 -> #0:0 (copy)Here’s all of my code :
var express = require('express');
spawn = require('child_process').spawn;
var app = express();
app.use(express.static(__dirname + '/public'));
app.listen(8080);
console.log("Running on Port 8080");
var ffmpeg1 = spawn('ffmpeg', [
'-y',
//video
'-i', 'rtsp://admin:password@192.168.1.54:554/axis-media/media.amp?videocodec=h264&resolution=1280x720',
'-map', '0:0',
'-pix_fmt', 'yuv420p',
'-color_range', '2',
'-c:v', 'libvpx-vp9',
'-s', '1280x720',
'-keyint_min', '25',
'-g', '25',
// //VP9_LIVE_PARAMS
'-speed', '6',
'-tile-columns', '4',
'-frame-parallel', '1',
'-threads', '8',
'-static-thresh', '0',
'-max-intra-rate', '300',
'-deadline', 'realtime',
'-lag-in-frames', '0',
'-error-resilient', '1',
'-f', 'webm_chunk',
'-header', 'public/glass_360.hdr',
'-chunk_start_index', '1',
'public/glass_360_%d.chk',
]);
setTimeout(()=> {
var ffmpeg2 = spawn('ffmpeg', [
'-y',
'-f', 'webm_dash_manifest',
'-live', '1',
'-i', 'public/glass_360.hdr',
'-c', 'copy',
'-map', '0',
'-r', '25',
'-framerate', '25',
'-f', 'webm_dash_manifest',
'-live', '1',
'-adaptation_sets', '"id=0,streams=0"',
'-chunk_start_index', '1',
'-chunk_duration_ms', '2000',
'-time_shift_buffer_depth', '7200',
'-minimum_update_period', '7200',
'public/glass_live_manifest.mpd'
]);
ffmpeg2.stdout.on('data',
function (data) {
console.log('ff2std: ' + data);
}
);
ffmpeg2.stderr.on('data',
function (data) {
console.log('ff2err: ' + data);
}
);
}, 5000);
ffmpeg1.stdout.on('data',
function (data) {
console.log('ff1std: ' + data);
}
);
ffmpeg1.stderr.on('data',
function (data) {
console.log('ff1err: ' + data);
}
);Here is all of my output :
Running on Port 8080
ff1err: ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2/include/openjpeg-2.1 --enable-nonfree --enable-vda
ff1err: libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
ff1err: Input #0, rtsp, from 'rtsp://admin:password@192.168.1.54:554/axis-media/media.amp?videocodec=h264&resolution=1280x720':
Metadata:
title : Session streamed with GStreamer
comment : rtsp-server
Duration: N/A, start: 0.033344
ff1err: , bitrate: N/A
Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 180k tbc
ff1err: [swscaler @ 0x7f8df281bc00] deprecated pixel format used, make sure you did set range correctly
ff1err: [libvpx-vp9 @ 0x7f8df2800600] v1.6.1
ff1err: Output #0, webm_chunk, to 'public/glass_360_%d.chk':
Metadata:
title : Session streamed with GStreamer
comment : rtsp-server
encoder : Lavf57.56.101
ff1err: Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 200 kb/s, 25 fps, 1k tbn, 25 tbc
Metadata:
encoder : Lavc57.64.101 libvpx-vp9
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
ff1err: frame= 10 fps=0.0 q=0.0 size=N/A time=00:00:00.36 bitrate=N/A speed=0.71x
ff1err: frame= 25 fps= 25 q=0.0 size=N/A time=00:00:00.96 bitrate=N/A speed=0.946x
ff1err: frame= 40 fps= 26 q=0.0 size=N/A time=00:00:01.56 bitrate=N/A speed=1.03x
ff1err: frame= 55 fps= 27 q=0.0 size=N/A time=00:00:02.16 bitrate=N/A speed=1.07x
ff1err: frame= 70 fps= 28 q=0.0 size=N/A time=00:00:02.76 bitrate=N/A speed=1.09x
ff1err: frame= 85 fps= 28 q=0.0 size=N/A time=00:00:03.36 bitrate=N/A speed=1.11x
ff2err: ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2/include/openjpeg-2.1 --enable-nonfree --enable-vda
ff2err: libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
ff2err: [webm_dash_manifest @ 0x7fbc5b80b400] Could not find codec parameters for stream 0 (Video: vp9, none, 1280x720): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
ff2err: Input #0, webm_dash_manifest, from 'public/glass_360.hdr':
Metadata:
title : Session streamed with GStreamer
encoder : Lavf57.56.101
Duration: N/A, bitrate: N/A
Stream #0:0: Video: vp9, none, 1280x720
ff2err: , SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
Metadata:
webm_dash_manifest_file_name: glass_360.hdr
webm_dash_manifest_track_number: 1
ff2err: Could not write header for output file #0 (incorrect codec parameters ?): Operation not permittedStream mapping:
Stream #0:0 -> #0:0 (copy)
ff2err: Last message repeated 1 times
ff1err: frame= 101 fps= 29 q=0.0 size=N/A time=00:00:04.00 bitrate=N/A speed=1.13x
ff1err: frame= 116 fps= 29 q=0.0 size=N/A time=00:00:04.60 bitrate=N/A speed=1.14x
ff1err: frame= 131 fps= 29 q=0.0 size=N/A time=00:00:05.20 bitrate=N/A speed=1.15x
ff1err: frame= 146 fps= 29 q=0.0 size=N/A time=00:00:05.80 bitrate=N/A speed=1.15x
ff1err: frame= 161 fps= 29 q=0.0 size=N/A time=00:00:06.40 bitrate=N/A speed=1.15x
ff1err: frame= 177 fps= 29 q=0.0 size=N/A time=00:00:07.04 bitrate=N/A speed=1.16x
ff1err: frame= 192 fps= 29 q=0.0 size=N/A time=00:00:07.64 bitrate=N/A speed=1.16x
ff1err: frame= 207 fps= 29 q=0.0 size=N/A time=00:00:08.24 bitrate=N/A speed=1.16x
ff1err: frame= 222 fps= 29 q=0.0 size=N/A time=00:00:08.84 bitrate=N/A speed=1.17x
ff1err: frame= 237 fps= 29 q=0.0 size=N/A time=00:00:09.44 bitrate=N/A speed=1.17x
ff1err: frame= 252 fps= 29 q=0.0 size=N/A time=00:00:10.04 bitrate=N/A speed=1.17xWhy is ffmpeg creating an empty .mpd file ?
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Piwik 3 Development Update #1 – New UI design, API changes & release date
1er septembre 2016, par Thomas Steur — Community, DevelopmentOver the last months, we have been actively working on the Piwik 3 release and we want to introduce you to the changes that we have done so far. They include a new and modern UI redesign, new widgets for your dashboard, and technical improvements under the hood.
New Piwik 3 UI
Based on Material Design we have revamped the user interface which is now more responsive, more usable and faster. While the UI is not yet finished, we invite you to check it out already and to let us know what you think.
This new Piwik material design is a visual language that synthesizes classic principles of good design with the innovation and possibility of technology and science.
More responsive
Piwik 3 will look and feel much better on your mobile phone and tablet. Many elements have been improved : the menus, the segment editor and dashboard selector, the widgets, the settings pages and most other pages so you can fully experience and enjoy Piwik on any device !
Improved usability
We have updated the menu structure, the dashboard selector as well as the footer in reports to make your life easier when using Piwik. We love to keep these complicated things simple. There are also many other tiny improvements that you will appreciate.
The Zen Mode lets you view in full screen your analytics reports and dashboards. Users love this feature and it can now be accessed by pressing “z” key.
Faster
To make the Piwik interface faster, we have refactored most of our CSS, HTML and JavaScript and moved more and more of our code into the client. As a result, Piwik now needs to reload the page much less often ! For example when you change the date or change the segment, Piwik will now load the reports instantly. To improve performance even further, Piwik will now load multiple reports on a single page in parallel.
Native fonts
Over the last months more and more web services have started using system fonts, and so will Piwik 3. System fonts look better, improve language support and give you a more native, familiar feeling.
For more details and screenshots have a look at the pull request for the Piwik 3 UI update.
New widgets
With the “Latest Piwik Plugin Updates” widget you won’t miss any newly added or updated plugin anymore. This will help you learn about and discover the useful plugins and themes available on the Marketplace.
Super users can now see at a glance the current state of the Piwik system, thanks to the new “System Check” and “System Summary” widgets.
API Changes
Piwik is the leading open analytics platform, highly customisable and extensible thanks to a flexible plugins architecture and a design based on APIs. In this new major Piwik 3 release, we significantly improve the foundation of our open platform and several of its core APIs.
The new Widgets and Reporting API makes it possible to add reports and widgets to any existing reporting page. In the past, reporting pages had to be created manually which was time consuming and it was hard to maintain a consistent look across different reporting pages. Now reporting pages are generated automatically by the Piwik platform.
The Plugin Settings API was changed to improve performance and to let plugin developers customize the Websites Manager. This is one step towards our goal to let users not only manage websites but also mobile apps, cars, coffee machines or any other thing.
To see a full list of changes in the Piwik 3 analytics platform, have a look at the developer changelog.
Developer docs
The Piwik Developer Zone is full of guides and API references to help developers understand, integrate and extend Piwik. As some APIs have changed in the Piwik 3 release it is now possible to select the Piwik version in the top right corner of the developer zone.
We are updating guides for Piwik 3 and added a Piwik 2 -> Piwik 3 Migration Guide for plugin developers. Many other guides were updated such as Menus, Custom Report and Widgets.
Release date
The first Piwik 3 beta release will be available in the next four weeks. Beta testers automatically receive the update if they are subscribed to the “Latest Beta” release channel. The final Piwik 3 release will be ready before the end of the year. If you want to give it a try, you can either use Piwik from Git and check out the “3.x-dev” branch, or download Piwik 3 from GitHub.
Closing thoughts
With faster & more beautiful reports, better APIs and more stability, Piwik 3 is a big step forward for all Piwik users. As our mission is to create, as a community, the leading international open source web analytics platform that gives every user full control of their data, we are very excited to introduce you to this upcoming release.
We now offer Custom Development services if you like to sponsor a new feature or bug fix, or if you have any custom requirements. And if you use Piwik Analytics to grow your business and need quality help, contact the Piwik analytics experts to get started.
Until our next Piwik 3 dev update, Happy analysis !
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Open VideoStream using OpenCV 4.5.1 works on Windows but fails on Docker python:3.9.2-slim-buster for specific IP cam
18 mai 2021, par Qua285I have 2 ip cameras - one of Hikvision and another of Provision ISR. Both use Onvif and work on VLC.
I've written a simple python script to record images every 5 sec from their video stream.
On Windows 10, using VSCode they both work as expected. Once deployed to a Docker container, my script works as expected with the Hikvision but fails with the Provision ISR - it doesn't open the stream.


Running
python -c "import cv2; print(cv2.getBuildInformation())"on windows (venv 3.9.2) and on docker machine bring slightly different results but it's beyond my understanding to take something out of it...
Here is the Windows one :

General configuration for OpenCV 4.5.1 =====================================
 Version control: 4.5.1

 Platform:
 Timestamp: 2021-01-02T14:30:58Z
 Host: Windows 6.3.9600 AMD64
 CMake: 3.18.4
 CMake generator: Visual Studio 14 2015 Win64
 CMake build tool: C:/Program Files (x86)/MSBuild/14.0/bin/MSBuild.exe
 MSVC: 1900

 CPU/HW features:
 Baseline: SSE SSE2 SSE3
 requested: SSE3
 Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2
 requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
 SSE4_1 (15 files): + SSSE3 SSE4_1
 SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2
 FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
 AVX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
 AVX2 (29 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2

 C/C++:
 Built as dynamic libs?: NO
 C++ standard: 11
 C++ Compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe (ver 19.0.24241.7)
 C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 
/MP /MT /O2 /Ob2 /DNDEBUG
 C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 
/MP /MTd /Zi /Ob0 /Od /RTC1
 C Compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe
 C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /MT /O2 /Ob2 /DNDEBUG
 C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /MTd /Zi /Ob0 /Od /RTC1
 Linker flags (Release): /machine:x64 /NODEFAULTLIB:atlthunk.lib /INCREMENTAL:NO /NODEFAULTLIB:libcmtd.lib /NODEFAULTLIB:libcpmtd.lib /NODEFAULTLIB:msvcrtd.lib
 Linker flags (Debug): /machine:x64 /NODEFAULTLIB:atlthunk.lib /debug /INCREMENTAL /NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:libcpmt.lib /NODEFAULTLIB:msvcrt.lib
 ccache: NO
 Precompiled headers: YES
 Extra dependencies: ade wsock32 comctl32 gdi32 ole32 setupapi ws2_32
 3rdparty dependencies: ittnotify libprotobuf zlib libjpeg-turbo libwebp libpng libtiff libopenjp2 IlmImf quirc ippiw ippicv

 OpenCV modules:
 To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
 Disabled: world
 Disabled by dependency: -
 Unavailable: java python2 ts
 Applications: -
 Documentation: NO
 Non-free algorithms: NO

 Windows RT support: NO

 GUI:
 Win32 UI: YES
 VTK support: NO

 Media I/O:
 ZLib: build (ver 1.2.11)
 JPEG: build-libjpeg-turbo (ver 2.0.6-62)
 WEBP: build (ver encoder: 0x020f)
 PNG: build (ver 1.6.37)
 TIFF: build (ver 42 - 4.0.10)
 JPEG 2000: build (ver 2.3.1)
 OpenEXR: build (ver 2.3.0)
 HDR: YES
 SUNRASTER: YES
 PXM: YES
 PFM: YES

 Video I/O:
 DC1394: NO
 FFMPEG: YES (prebuilt binaries)
 avcodec: YES (58.91.100)
 avformat: YES (58.45.100)
 avutil: YES (56.51.100)
 swscale: YES (5.7.100)
 avresample: YES (4.0.0)
 GStreamer: NO
 DirectShow: YES
 Media Foundation: YES
 DXVA: NO

 Parallel framework: Concurrency

 Trace: YES (with Intel ITT)

 Other third-party libraries:
 Intel IPP: 2020.0.0 Gold [2020.0.0]
 at: C:/Users/appveyor/AppData/Local/Temp/1/pip-req-build-wvn_it83/_skbuild/win-amd64-3.9/cmake-build/3rdparty/ippicv/ippicv_win/icv
 Intel IPP IW: sources (2020.0.0)
 at: C:/Users/appveyor/AppData/Local/Temp/1/pip-req-build-wvn_it83/_skbuild/win-amd64-3.9/cmake-build/3rdparty/ippicv/ippicv_win/iw
 Lapack: NO
 Eigen: NO
 Custom HAL: NO
 Protobuf: build (3.5.1)

 OpenCL: YES (NVD3D11)
 Include path: C:/Users/appveyor/AppData/Local/Temp/1/pip-req-build-wvn_it83/opencv/3rdparty/include/opencl/1.2
 Link libraries: Dynamic load

 Python 3:
 Interpreter: C:/Python39-x64/python.exe (ver 3.9)
 Libraries: C:/Python39-x64/libs/python39.lib (ver 3.9.0)
 numpy: C:/Users/appveyor/AppData/Local/Temp/1/pip-build-env-sk7r7w_5/overlay/Lib/site-packages/numpy/core/include (ver 1.19.3)
 install path: python

 Python (for build): C:/Python27-x64/python.exe

 Java:
 ant: NO
 JNI: C:/Program Files/Java/jdk1.8.0/include C:/Program Files/Java/jdk1.8.0/include/win32 C:/Program Files/Java/jdk1.8.0/include
 Java wrappers: NO
 Java tests: NO

 Install to: C:/Users/appveyor/AppData/Local/Temp/1/pip-req-build-wvn_it83/_skbuild/win-amd64-3.9/cmake-install
-----------------------------------------------------------------


this is the Docker one (python:3.9.2-slim-buster) :


General configuration for OpenCV 4.5.1 =====================================
 Version control: 4.5.1-dirty

 Platform:
 Timestamp: 2021-01-02T13:04:10Z
 Host: Linux 4.15.0-1077-gcp x86_64
 CMake: 3.18.4
 CMake generator: Unix Makefiles
 CMake build tool: /bin/gmake
 Configuration: Release

 CPU/HW features:
 Baseline: SSE SSE2 SSE3
 requested: SSE3
 Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
 requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
 SSE4_1 (15 files): + SSSE3 SSE4_1
 SSE4_2 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2
 FP16 (0 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
 AVX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
 AVX2 (29 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
 AVX512_SKX (4 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX

 C/C++:
 Built as dynamic libs?: NO
 C++ standard: 11
 C++ Compiler: /usr/lib/ccache/compilers/c++ (ver 9.3.1)
 C++ flags (Release): -Wl,-strip-all -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
 C++ flags (Debug): -Wl,-strip-all -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
 C Compiler: /usr/lib/ccache/compilers/cc
 C flags (Release): -Wl,-strip-all -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
 C flags (Debug): -Wl,-strip-all -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
 Linker flags (Release): -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a -L/root/ffmpeg_build/lib -Wl,--gc-sections -Wl,--as-needed
 Linker flags (Debug): -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a -L/root/ffmpeg_build/lib -Wl,--gc-sections -Wl,--as-needed
 ccache: YES
 Precompiled headers: NO
 Extra dependencies: ade Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Test Qt5::Concurrent /lib64/libpng.so /lib64/libz.so dl m pthread rt
 3rdparty dependencies: ittnotify libprotobuf libjpeg-turbo libwebp libtiff libopenjp2 IlmImf quirc ippiw ippicv

 OpenCV modules:
 To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc ml objdetect photo python3 stitching video videoio
 Disabled: world
 Disabled by dependency: -
 Unavailable: java python2 ts
 Applications: -
 Documentation: NO
 Non-free algorithms: NO

 GUI:
 QT: YES (ver 5.15.0)
 QT OpenGL support: NO
 GTK+: NO
 VTK support: NO

 Media I/O:
 ZLib: /lib64/libz.so (ver 1.2.7)
 JPEG: libjpeg-turbo (ver 2.0.6-62)
 WEBP: build (ver encoder: 0x020f)
 PNG: /lib64/libpng.so (ver 1.5.13)
 TIFF: build (ver 42 - 4.0.10)
 JPEG 2000: build (ver 2.3.1)
 OpenEXR: build (ver 2.3.0)
 HDR: YES
 SUNRASTER: YES
 PXM: YES
 PFM: YES

 Video I/O:
 DC1394: NO
 FFMPEG: YES
 avcodec: YES (58.109.100)
 avformat: YES (58.61.100)
 avutil: YES (56.60.100)
 swscale: YES (5.8.100)
 avresample: NO
 GStreamer: NO
 v4l/v4l2: YES (linux/videodev2.h)

 Parallel framework: pthreads

 Trace: YES (with Intel ITT)

 Other third-party libraries:
 Intel IPP: 2020.0.0 Gold [2020.0.0]
 at: /tmp/pip-req-build-ddpkm6fn/_skbuild/linux-x86_64-3.9/cmake-build/3rdparty/ippicv/ippicv_lnx/icv
 Intel IPP IW: sources (2020.0.0)
 at: /tmp/pip-req-build-ddpkm6fn/_skbuild/linux-x86_64-3.9/cmake-build/3rdparty/ippicv/ippicv_lnx/iw
 Lapack: NO
 Eigen: NO
 Custom HAL: NO
 Protobuf: build (3.5.1)

 OpenCL: YES (no extra features)
 Include path: /tmp/pip-req-build-ddpkm6fn/opencv/3rdparty/include/opencl/1.2
 Link libraries: Dynamic load

 Python 3:
 Interpreter: /opt/python/cp39-cp39/bin/python (ver 3.9)
 Libraries: libpython3.9.a (ver 3.9.0)
 numpy: /tmp/pip-build-env-jqrfyj0w/overlay/lib/python3.9/site-packages/numpy/core/include (ver 1.19.3)
 install path: python

 Python (for build): /bin/python2.7

 Java:
 ant: NO
 JNI: NO
 Java wrappers: NO
 Java tests: NO

 Install to: /tmp/pip-req-build-ddpkm6fn/_skbuild/linux-x86_64-3.9/cmake-install
-----------------------------------------------------------------


If relevant, the docker is installed on an Intel NUC with Ubuntu Desktop 20.04


If relevant, this is the dockerfile I've used to build the image :


FROM python:3.9.2-slim-buster as builder

# Keeps Python from generating .pyc files in the container
ENV PYTHONDONTWRITEBYTECODE=1
# Without this setting, Python never prints anything out.
ENV PYTHONUNBUFFERED=1

RUN pip install --upgrade pip
COPY ./Cam/requirements.txt .
RUN pip install -r requirements.txt
RUN apt-get update
RUN apt-get install ffmpeg libsm6 libxext6 -y

WORKDIR /app

FROM builder
COPY ./Cam .
CMD ["python", "camStreamer.py"]


and last, this is the script code (simplified) :


import os, logging, threading
from os.path import join
import sys, inspect, datetime, time
from pathlib import Path
import cv2
import imutils
from imutils.video import VideoStream

def StartRecording(showVideoWindow, interval, imagePath):
 key = None
 cam = VideoStream(os.getenv("CAM_RTSP")).start()
 counter = 0
 try:
 while True:
 ## 2 min retry to connect if frame is None
 if counter > 60/interval*2: break

 ts = time.time()
 ## Wait for [interval] seconds
 while ts + interval > time.time():
 continue
 print(f"Counter: {counter}, ts: {str(ts)}")

 frame = cam.read()
 if frame is None:
 counter += 1
 continue
 counter = 0

 print("frame is valid")
 if showVideoWindow:
 frame = imutils.resize(frame, width=1200)
 cv2.imshow('VIDEO', frame)

 imageName = f"{datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%dT%H_%M_%S')}.jpg"
 cv2.imwrite(join(imagePath, imageName), frame)
 print("saved image to disk")

 key = cv2.waitKey(1) & 0xFF
 if key == ord('q') or key == ord('r'):
 break

 except Exception as e:
 exc_tb = sys.exc_info()[2]
 extra = ""
 print(f"{inspect.stack()[0][3]}: {e} (lineno: {exc_tb.tb_lineno}) {extra}")
 finally:
 if showVideoWindow: cv2.destroyAllWindows()
 cam.stop()
 return key


while True:
 log.warning(f"Starting {Name}")
 key = StartRecording(
 showVideoWindow=(Env.startswith("development") and os.getenv("SHOW_VIDEO") == "True"),
 interval=int(os.getenv("SAVE_IMAGE_INTERVAL")),
 imagePath=os.getenv('CAPTURE_FOLDER')
 )
 if key == ord('q'):
 break


I apologize for the very long post. Hopefully someone can put me on the right direction...


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