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Autres articles (34)

  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

Sur d’autres sites (4872)

  • ffmpeg video translation with filter

    23 juin 2013, par user987058

    I have a problem doing translation of pixels in a frame of a video. What I want to do is to translate all pixels by certain amount (say 50 pixels) in a frame. I tried to modify the example filters to assign pixels to out array by 50 pixels. It does somehow shift the content but however, the color is shifted (or the color stays at the same place.) I'm very new to video processing and video format. Could anyone tell me what's wrong with my approach and what should I change it.

    Thank you,
    Yi

  • ffmpeg frame grabbing slow on mp4 files

    24 octobre 2012, par user1444886

    The following ffmpeg frame grab command takes a long time to grab an image from the mp4 file.

    ffmpeg.exe -itsoffset -200 -i C:\93844428.mp4 -vcodec mjpeg -vframes 1 -y -an -f rawvideo -s 640x360 C:\test\out1.jpg

    For a 20MB file (about 2 minutes of video) it takes up to about 6 seconds to find the image depending on what offset (in seconds) you ask to grab it.

    For a 100MB it can anything in many minutes if you request a large offset.

    This only appears to be an issue with mp4 files.

    Is there anything that can be done to improve this ?

  • Compress / Reduce file size of VIDEO

    2 avril 2014, par rishiJasapara

    I currently have a system in place where the user can upload a MP4 file and the same is available for download on mobile devices. But sometimes, the videos are more than 5MB in size and back here in my country, majority of the population uses 2G. So it typically takes 15-20 minutes to download large videos.

    Is there any way in which I can compress MP4 files while they are being uploaded and then save them in the folder so that instead of a 5MB video, I get a 2MB video which takes relatively less time to download. File format will always be MP4 only.

    I know of FFMPEG-PHP, but as far as I read, it only supports extracting information of the video and for video conversion. I could not find any reference for VIDEO COMPRESSION. I would be grateful if you could guide me on this.

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