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Mot : - Tags -/Musique

Autres articles (56)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

Sur d’autres sites (7963)

  • how to change the fps of video during playback of video without restarting video

    8 juin 2018, par Mahek Delawala

    I want to change the fps of video at run time (during the playback of video) without restarting or pausing using ffmpeg. I searched about it in the internet but I am not able to get the command which can change the fps directly without restarting the video but i found ffmpeg command which can create a new file with modified fps as shown below.
    ffmpeg -y -r 20 -i input_file -r 45 output_file
    Is it possible to change fps of video during run time using ffmpeg command ? If yes please provide me the command if not how can i change using c code. Please help me in this issue as early as possible.
    Thank you.

  • Read Audio and Video, edit Video frame, then write back Audio and Video - Using python

    19 avril 2021, par CowKeyMan

    I'm looking to do exactly as the title says, ie :

    


      

    1. Read a file containing both audio and video

      2. 


    2. Edit the video frames individually

      3. 


    3. Write back the video with the new frames but the same exact audio as before

      4. 


    


    OpenCV is not a good option for reading and writing since it doesn't handle audio, altough I can use opencv in step 2.

    


    The language I am using is Python, as this needs to be integrated with a bigger system.

    


    My question is this : What software stack / librarries are appropriate for this kind of task and if anyone can point me to some resources it would be highly appreciated

    


    So far I have found the following options, but would like some feedback on them based on experience :

    


      

    1. ffmpeg

      2. 


    2. MoviePy

      3. 


    3. libav

      4. 


    


  • Convert Transparent PNGs to a Transparent Video

    15 février 2023, par Aurora7979

    I have a set of transparent PNG pictures, and I want to convert them into a video with transparent background (play the PNGs continuously).

    


    First, I used ffmpeg with the terminal command :

    


    ffmpeg -framerate 30 -pattern_type glob -i '*.png' \-c:v libx264 -pix_fmt yuva420p out.mp4


    


    And I learnt that the codec libx264 does not compatible with the alpha channel. Then, I changed to another codec and used the following command :

    


    ffmpeg -framerate 30 -pattern_type glob -i '*.png' \-c:v libvpx-vp9 -pix_fmt yuva420p out.mp4


    


    However, QuickTime Player cannot play the resulting out.mp4. I don't know if it was because the video conversion failed or it was the fault of QuickTime Player. The terminal didn't show any error message, though.

    


    Therefore, I would like to ask :

    


      


    1. Which codec I should use to create a transparent video that a normal video player can play ?

      


      2. 


    2. Can the output MP4 video format support transparent videos ?

      


      3. 


    3. If there is another tool that is far more superior than ffmpeg for my purpose, I am willing to give it a try.

      


      4. 


    


    Thank you for any advice.

    


    All the best,

    


    Aurora

    


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