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  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

Sur d’autres sites (12775)

  • How to display a video with alpha channel on video FFMPEG

    5 novembre 2016, par AlfredMeier

    I want to put a video with alpha channel on a default video and stream this to YouTube. But I don’t know how to do that.

    Here is what I have done :
    ffmpeg -re -i video1.mp4 -codec copy -f flv rtmp://a.rtmp.youtube.com/live2/1234-1234-1234-1234

    Thanks for your help :)

  • How I can overlay video onto another video start from 2 second to 4 second ?

    23 janvier 2023, par KoliK

    I need overlay video onto another video start from 2 second to 4 second.

    


    I use ffmpeg for overlaying video onto another video for this command
ffmpeg -i tmp/test_screen_1672755242397.mp4 -vf "movie=tmp/test_camera_1672755249551.mp4, scale=250: -1 [inner]; [in][inner] overlay =10: 10 [out]" completed.mp4
But video test_camera_1672755249551 must be to star from 2 second and end to 4 second. What I need to add in command for result ?

    


  • Cut a video in between key frames without re-encoding the full video using ffpmeg ? [closed]

    13 juillet 2024, par bguiz

    I would like to cut a video at the beginning at any particular timestamp, and it need to be precise, so the nearest key frame is not good enough.

    


    Also, these videos are rather long - an hour or longer - so I would like to avoid re-encoding this altogether if possible, or otherwise only re-encode a minimal fraction of the total duration. Thus, would like to maximise the use of -vcodec copy.

    


    How can I accomplish this using ffmpeg ?

    


    NOTE : See scenario, and my own rough idea for a possible solution below.

    


    


    Scenario :

    


      

    • Original video

        

      • Length of 1:00:00

        • 


      • Has a key frame every 10s

        • 


      


      • 


    • Desired cut :

        

      • From 0:01:35 through till the end

        • 


      


      • 


    • Attempt #1 :

        

      • Using -ss 0:01:35 -i blah.mp4 -vcodec copy, what results is a file where :

        • 


      • audio starts at 0:01:30

        • 


      • video also starts at 0:01:30

        • 


      • this starts both the audio and the video too early

        • 


      


      • 


    • using -i blah.mp4 -ss 0:01:35 -vcodec copy, what results is a file where :

        

      • audio starts at 0:01:35,

        • 


      • but the video is blank/ black for the first 5 seconds,

          

        • until 0:01:40, when the video starts

          • 


        


        • 


      • this starts the audio on time,
but the video starts too late

        • 


      


      • 


    


    


    Rough idea

    


      

    • (1) cut 0:01:30 to 0:01:40

        

      • re-encode this to have new key frames,
including one at the target time of 0:01:35

        • 


      • then cut this to get the 5 seconds from 0:01:35 through 0:01:40

        • 


      


      • 


    • (2) cut 0:01:40 through till the end

        

      • without re-encoding, using -vcodec copy

        • 


      


      • 


    • (3) ffmpeg concat the first short clip (the 5 second one)
with the second long clip

      • 


    


    I know/ can work out the commands for (2) and (3), but am unsure about what commands are needed for (1).

    


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