
Recherche avancée
Autres articles (38)
-
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
-
Possibilité de déploiement en ferme
12 avril 2011, parMediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)
Sur d’autres sites (4299)
-
Comparing PSNR of two videos, possibly with ffmpeg ?
22 décembre 2016, par UnixNerdI would like to compare a large number of videos to a good reference video in order to find videos with poor quality. I want to do this in a batch mode by calling a command line utility, I’m already using ffmpeg in this manner to grab video frames.
ffmpg will give me a PSNR value to compare the input and output videos if I transcode a video. I was under the impression I could use something like this to compare two separate videos but can’t find a way to do it.
Would I be better grabbing a single frame from each video and comparing those somehow ? PSNR may not be the best option for me ?
I’m not looking for minor differences in quality but for major differences such a sync problems or large amounts of snow.
Any suggestions ? Thanks in advance :-)
-
Comparing PSNR of two videos, possibly with ffmpeg ?
24 septembre 2020, par UnixNerdI would like to compare a large number of videos to a good reference video in order to find videos with poor quality. I want to do this in a batch mode by calling a command line utility, I'm already using ffmpeg in this manner to grab video frames.



ffmpg will give me a PSNR value to compare the input and output videos if I transcode a video. I was under the impression I could use something like this to compare two separate videos but can't find a way to do it.



Would I be better grabbing a single frame from each video and comparing those somehow ? PSNR may not be the best option for me ?



I'm not looking for minor differences in quality but for major differences such a sync problems or large amounts of snow.



Any suggestions ? Thanks in advance :-)


-
Can't write H264 videos with Python and OpenCV
14 octobre 2017, par slalomchipUsing OpenCV with Python 3.6 (within an Anaconda platform) in a Windows environment, I can write videos using the DIVX, MJPG, and MPEG codecs (and probably some others) but cannot write videos using the H264 codec. I can read AVC1 (which is a version of H264) videos with OpenCV without issue.
I have
opencv_ffmpeg320_64.dll
in myAnaconda3
folder and also in myAnaconda3\Lib\site-packages
folder. I have also placed the downloaded and unzipped version of ffmpeg in my main (C :) folder.Does anyone have any suggestions of what I need to do to write H264 videos with OpenCV ? Thanks !