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Autres articles (35)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Submit enhancements and plugins
13 avril 2011If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone. -
Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)
Sur d’autres sites (4476)
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Making colour of MP4 video consistent in Chrome
21 septembre 2021, par OneWorldI see a difference in the colour of a video between different machines using different browsers. I was wondering what the cause of the difference is ?


I use FFMPEG to create the video. I sent the video to three different people with slightly different machines, and slightly different Chrome versions, to try and see where the differences are.


The FFMPEG output from the video is as follows :-


ffmpeg version 3.2.2-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2016 the FFmpeg developers
 built with gcc 5.4.1 (Debian 5.4.1-4) 20161202
 configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
 libavutil 55. 34.100 / 55. 34.100
 libavcodec 57. 64.101 / 57. 64.101
 libavformat 57. 56.100 / 57. 56.100
 libavdevice 57. 1.100 / 57. 1.100
 libavfilter 6. 65.100 / 6. 65.100
 libswscale 4. 2.100 / 4. 2.100
 libswresample 2. 3.100 / 2. 3.100
 libpostproc 54. 1.100 / 54. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'red_and_yellow_uat.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf57.56.100
 Duration: 00:00:03.00, start: 0.000000, bitrate: 84 kb/s
 Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, unknown/bt709/bt709), 1080x1080, 81 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
 Metadata:
 handler_name : VideoHandler


From the same UAT rendered Video, with screenshots taken in Chrome from person 1, person 2, person 3, and person 4, and using GIMP colour picker on my machine from the screenshots, the results for red, and yellow are as follows.


Person 1:- #A83833 and #FFCB2E Chrome Version 92.0.4515.131 (Official Build) (64-bit)
Person 2:- #AB3334 and #FFCA38 Chrome Version 92.0.4515.107


(Note : these colours Match / are very close to the original).


Both these machines above are 64 bit Ubuntu machines, using Ubuntu 18.04.5 LTS
We both use the gnome screenshot tool in Ubuntu to take the screenshot, which creates an 8bit PNG.


Person 3:- #B14039 and #FED303 Chrome Version 93.0.4577.63 (Official Build) (x86_64)
Person 4:- #B2403A and #FFD201 Chrome Version 92.0.4515.159 (Official Build) (x86_64)


Mac screenshots are taken using cmd shift 4, and generate an 8bit PNG file.


Person 3 Machine Spec :-
Machine :- Macbook Pro (2019)
OS : macOS Big Sur Version 11.5.2
Processor :- 2.6Ghz Intel Core i7 processor. 32bit architecture (typing arch in her tty terminal returns i386).
Graphics :- Intel UHD Graphics 630 1536


Person 4 Machine Spec :-
Machine :- Macbook Pro (Retina, 2015)
OS :- MacOS Mojave, Version 10.14.6
Processor :- 2.5GHz, Intel Core i7
Graphics :- AMD Radeon R9, M370X 2 GB Intel Iris Pro 1536 MB


Person 1 screenshot




Person 2 screenshot




Person 3 screenshot




Person 4 screenshot




Any suggestions anyone has to make these colours consistent would be much appreciated. Would love to know why it happens also ? If anyone can explain ?


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PHP thumbnail list for video files in directory / playback on click (VLC)
10 mai 2017, par MikeSkrilBasically I’m looking for a very simple media server.
I have a server running on a local machine (Ubuntu). There are video files in var/www/movies which I want to index within a web browser.
I need to show a thumbnail for each file (ffmpeg ?) and a click on the thumbnail would open/play the video file with VLC.
Anybody knows of an existing script that I could build on, or would I have to start from scratch ?
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How can I speed up this side by side video stitch in FFMPEG
21 octobre 2020, par ianfI have two videos the same size and pixel format (about 240x360) left and right that I want to stitch together.


I'm using :


ffmpeg -i left.mp4 -i right.mp4 -filter_complex "[0:v][1:v]hstack=inputs=2:shortest=1[v]; [0:a][1:a]amerge[a]" -map "[v]" -map "[a]" -ac 2 -shortest -y output.mp4


which takes about 15 seconds on a 3 core machine. I see x1.25 on the conversion line.


I know this isnt too bad, but any speed up I can make is going to help a lot as its in heavy use.


Any ideas how I can improve this ?


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