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Autres articles (51)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • 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 (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

Sur d’autres sites (4523)

  • FFMPEG video compression take too much time to compress the video

    1er janvier 2015, par Usman Afzal

    Video Upload Stats

    15 Sec Video on Samsung galaxy S5

    Using back camera : 6.86 MB [15.8 sec]

    Compress File Size : 1.33 MB

    Compression Time : 40-50 sec

    Following command I have used to compress this video file.

    [/data/data/{app-package-name}/app_bin/ffmpeg, -y, -i, /storage/emulated/0/Android/data/{app-package-name}/files/my-video-library/videos/1420020518900.mp4, -strict, -2, -b:v, 700k, -s, 640x360, -r, 30, -vcodec, libx264, -acodec, aac, -ac, 1, -b:a, 64k, -ar, 44100, -vf, vflip, /storage/emulated/0/Android/data/{app-package-name}/files/my-video-store/videos/acbfc5d3-b6c1-4cb8-89db-13aa49003760.mp4]

  • Converting PNG images to MP4 in Jupyter

    15 mars 2020, par Steve H

    This has had me going round in circles for hours, so I’m hoping one of you kind gents can help.

    I am trying to learn more about data science and have followed this course on creating a population pyramid (https://www.viralml.com/video-content.html?v=WmyYyOtZwzs). There were a few problems in the code, which I rectified, but one has eluded me.

    I am trying to convert a collection of images in the format anim_%d.png to an mp4 file using the code :

    ffmpeg -framerate 10 -i "anim_%d.png" -pix_fmt yuv420p out.mp4

    However, I get an invalid syntax error.

    I have also tried :

    avconv -f image2 -i anim_%d.png -r 76 -s 800x600 foo.avi

    then :

    ffmpeg -r 10 -i "anim_%d.png" -pix_fmt yuv420p out.mp4

    But they all give a syntax error.

    I am using Jupyter, via Anaconda on a Windows machine with Python 3.

    Any help would be greatly appreciated.

    Thanks
    Steve

  • How to write image to ffmpeg with multi thread

    19 septembre 2022, par chromize

    I'was trying to encode video from opencvSharp mat to ffmpeg.
Now,It's.done. But,It has low speed encoding problem.

    


    for (int  StartFrame = 0; StartFrame < EndFrame; StartFrame ++)
{                  
    using (var ms = new MemoryStream())
    {     
        //read mat from videocapture
        Mat mat =CreateRenderingMat(StartFrame)
        BitmapConverter.ToBitmap(mat).Save(ms, ImageFormat.Bmp);
        ms.WriteTo(proc.StandardInput.BaseStream);
        Cv2.WaitKey();
        mat.Dispose();
        ms.Dispose();
        ms.Close();
        Debug.WriteLine(movePos.ToString());
     }
 }


    


    Now, I wanna manage it with multi threading.
But,I don't make sence.
Tell me some advice. Thank you.

    


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