Recherche avancée

Médias (91)

Autres articles (111)

  • Les vidéos

    21 avril 2011, par

    Comme 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 (...)

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

Sur d’autres sites (5719)

  • How to concat videos that have different colour spaces ?

    17 avril 2023, par Ham789

    enter image description hereI writing a Python program that uses subprocess to automate ffmpeg. The program concatenates many videos together with the concat filter. The problem I have is that the colour of some of the videos is very washed out in the final output. I believe this is because the videos have different colour spaces. Some are B.709 and some are B.2020. The B.2020 videos are washed out.

    


    I have tried converting the B.2020 videos to B.709 before concatenating by using the following command on each video but the outputs are still washed out :

    


    ffmpeg -i input.mov -vf colorspace=all=bt709:iall=bt2020:fast=1 output.mov


    


    It wasn't clear to me which way round the arguments should go so I also tried switching the bt2020 and bt709 terms but they still look washed out but with more saturation.

    


    Is this the right approach ? Am I missing some other arguments in order to convert the B.2020 videos to B.709 while preserving their colour ?

    


    I have attached a side by side of the original and converted video.

    


    The metadata of the videos I am trying to concat are :

    


    Video 1

    


      

    • color_range=tv

      • 


    • color_space=bt709

      • 


    • color_transfer=bt709

      • 


    • color_primaries=bt709

      • 


    


    Video 2

    


      

    • color_range=tv

      • 


    • color_space=bt2020nc

      • 


    • color_transfer=arib-std-b67

      • 


    • color_primaries=bt2020

      • 


    


  • Combine two videos using Go and FFmpeg

    15 mai 2017, par JosephCenk

    I have two videos, Video A && Video B. I want to combine both videos to a new video C using golang. I tried FFmpeg, but I am unable to cross compile it for ARM devices and getting error message.

    /usr/local/ffmpeg/lib/libavdevice.so : file not recognized : File format not recognized collect2 : error : ld returned 1 exit status

    Please advise.
    Opening two media player at once is not an option. With amd64 I compile without having any issue.

  • What is the fastest method to compress videos before sending in React Native Chatting app

    2 août 2021, par Jawad Chawich

    So my question is mainly in the title, I'm working on a chatting app and I have to compress the videos before sending to the database (firebase storage). All I could find till now is ffmpeg, but the issue is that it's taking tremendous amount of time to compress videos, for a 10 sec video it would take like a minute, and i was astonished how fast it's done in whatsapp.. so is there any other method to compress videos faster ? Or does changing the ffmpeg command make an acceptable difference ? the currently used command is "-y -i $rVideoUrl -c:v libx264 -crf 28 -preset ultrafast $finalVideo"

    


Navigation