Recherche avancée

Médias (0)

Mot : - Tags -/objet éditorial

Aucun média correspondant à vos critères n’est disponible sur le site.

Autres articles (88)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • 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 (7047)

  • Append A Frame (PNG) FFMPEG To existing video, Make changes all the video - libx264

    7 décembre 2022, par agh bagherian

    I want to append a frame to existing video by using ffmpeg.

    


    p0.png, p1.png and p2.png (3 frames)

    


    by this command ffmpeg generate first video :

    


    ffmpeg -framerate 4 -f image2 -s 1280x720 -i p%d.png -vcodec libx264 -b 80k test1.mp4

    


    Then i want to append a frame to last of video, but total video in HEX-View will be changed. I use this command to append :

    


    ffmpeg -framerate 4 -f image2 -s 1280x720 -t 1 -i new_pic.png -i test1.mp4 -vcodec libx264 -b 80k test2.mp4

    


    Please see image below :

    


    Please see this screen shot

    


    But i want only append some hex code to end of first video....

    


    Please help me. Thanks

    


    I tried many commands. I did not get any results

    


  • Pipe opencv frames to ffmpeg

    17 juillet 2016, par baci

    I am trying to pipe opencv frames to ffmpeg using rawvideo format, which should accept the input as BGRBGRBGR... encoding the frame before piping is not an option.

    cv::Mat frame;
    
cv::VideoCapture cap("cap.avi");
    

    
while(1)
    
{
    
    cap >> frame;
    
    if(!frame.data) break;
    

    
    // some processing
    

    
    cv::Mat array = frame.reshape(0, 1); // to make continuous
    
    std::string output((char*) array.data, array.total() * array.elemSize());
    
    std::cout << output;
    
}

    with command

    cap.exe | ffplay -f rawvideo -pixel_format bgr24 -video_size 1920x1080 -framerate 10 -i -

    gives this kind of distorted result

    I think problem is not related to ffmpeg/ffplay, but something is wrong with my frame to raw conversion

    how to convert mat with 3 channels to rawvideo bgr24 format ?

  • use ffmpeg to add audio/video sequences from multiple other files in another file

    9 novembre 2015, par robert paré

    I have several mp4 files that contain video and audio content ("base" videos)

    I have a length value (recordingLength) in which the output video should be (let’s say 3600 seconds).

    What I’m trying, is first creating a blank file with the total length (recordingLength) of 3600 seconds. I do it like so :

    ffmpeg -f lavfi -i anullsrc -t 3600 -c:a libfdk_aac ./output.mp4

    Then let’s say I have 5 base videos each lasting a couple of minutes, I need to add each of them at a specific time in the blank file created above. I tried playing around with -itsoffset {seconds} -t {seconds} but I’m still really just playing around trying to get my head around all the options.

Navigation