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Autres articles (68)
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MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.
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FFmpeg takes too much time for generating m3u8 files from a mp4 file (166MB)
3 août 2021, par AngeleI am using ffmpeg in nodejs to generate 4 different resolutions (360p, 480p, 720p, 1080p).
I use a AWS lambda for each resolution and the last two take too much time.
I convert a mp4 file which has a size of 166MB into .ts files (with all segments associated)
It takes more than 900 seconds, and that's above the limit for a lambda timeout.


Also my goal is to encode mp4 videos of a maximum size of 4go... and it would be to encode within 900 seconds maximum for each resolution.


I used this website to find some parameters : https://docs.peer5.com/guides/production-ready-hls-vod/


These are my parameters given to ffmpeg :


"ffmpegParams": [
 "-vf",
 "scale=-2:1920",
 "-c:a",
 "aac",
 "-ar",
 "48000",
 "-c:v",
 "h264",
 "-profile:v",
 "main",
 "-crf",
 "20",
 "-sc_threshold",
 "0",
 "-g",
 "48",
 "-keyint_min",
 "48",
 "-hls_time",
 "4",
 "-hls_playlist_type",
 "vod",
 "-b:v",
 "5000k",
 "-maxrate",
 "5350k",
 "-bufsize",
 "7500k",
 "-b:a",
 "192k",
 "-hls_segment_filename",
 "/tmp/1080p_%03d.ts",
 "/tmp/1080p.m3u8"
]



Also I tried with these parameters '-vcodec', 'libx264', '-preset', 'ultrafast' and it made it faster but it is not enough...


Maybe there's something wrong with my command. If someone could maybe enlighten me ? :)


Edit : I ended up using an EC Fargate, perfect for this kind of need.


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"Undefined reference to `avcodec_alloc_frame" Error when compile and install Opencv on linux
7 avril 2016, par Kathy LeeI am compiling and installing OpenCV using the steps in http://docs.opencv.org/2.4/doc/tutorials/introduction/linux_install/linux_install.html
But during "making" it, it has error when it reaches 45%. The error message is
...
[ 43%] Built target pch_Generate_opencv_video
[ 44%] Built target opencv_video
[ 44%] Built target opencv_perf_video_pch_dephelp
[ 45%] Built target pch_Generate_opencv_perf_video
Linking CXX executable ../../bin/opencv_perf_video
../../lib/libopencv_videoio.so.3.1.0: undefined reference to `avcodec_alloc_frame'
../../lib/libopencv_videoio.so.3.1.0: undefined reference to `avcodec_encode_video'
collect2: error: ld returned 1 exit status
make[2]: *** [bin/opencv_perf_video] Error 1
make[1]: *** [modules/video/CMakeFiles/opencv_perf_video.dir/all] Error 2
make: *** [all] Error 2I downloaded and installed the latest version of ffmpeg from https://www.ffmpeg.org/.
Anyone knows how can I fix the errors ?
Thank you.
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ImagickPixelIterator is not read-only after all..
A few days ago I got a help request from a user : "How do you change pixel color during the iteration with ImagickPixelIterator". My initial response was that ImagickPixelIterator is read-only. Well, I have to admit I was wrong. After searching trough ImageMagick docs I stumbled across an (...)