Recherche avancée

Médias (0)

Mot : - Tags -/optimisation

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

Autres articles (38)

  • 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 plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

  • Les images

    15 mai 2013

Sur d’autres sites (4219)

  • How to create a video from images with FFmpeg ?

    28 octobre 2022, par user3877422
    ffmpeg -r 1/5 -start_number 2 -i img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4


    



    This line worked fine but I want to create a video file from images in another folder.
Image names in my folder are :

    



    img001.jpg
img002.jpg
img003.jpg
...


    



    How could I input images files from a different folder ? Example : C:\mypics

    



    I tried this command but ffmpeg generated a video with the first image (img001.jpg) only.

    



    ffmpeg -r 1/5 -start_number 0 -i C:\myimages\img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4


    


  • Feeding a series of images to ffmpeg as each image is created [closed]

    5 février 2013, par Mark Schneider

    I'm trying to use ffmpeg to build a 1280x720 slide-show from a sequence of pictures and videos, but I have concerns about potential disk I/O bottleneck.

    I expect a typical slide-show to have about 50 pictures and 2-3 videos (10-15 seconds each at 30 fps). I would like to show each picture for 3-4 seconds (possibly with a
    Ken Burns effect) with a smooth 2 second crossfade between each set of pictures (or for pictures adjacent to videos - between the picture and the first/last frame of the video).

    Given about 50 pictures, the crossfades alone would amount to about 3,000 images (50 transitions x 2 secs/transition x 30 fps). And I suppose if I implement a Ken Burns effect during each picture's 3-4 second showing, I'd have to provide ffmpeg with individual images for each of those frames. (I'm writing a script in Ruby that will pull a list of images from a database and in turn call ImageMagick to create the individual images for each frame. As I understand it, the RMagick library interfaces with ImageMagick such that the output images come back as in-memory objects without needing to write to disk. FWIW, I'm developing in Windows 8 and will deploy to Heroku.)

    All of the slideshow examples I've found online feed ffmpeg a set of images which have already been created. However, in an effort to avoid waiting on considerable disk I/O, I'd like to feed each image to ffmpeg as the image is created rather than create them all in advance.

    Is there a way to send each image file to ffmpeg on the fly as the file is created in memory ?

  • lavc/mjpegdec : Skip unknown APPx marker on bayer images

    29 août 2019, par Nick Renieris
    lavc/mjpegdec : Skip unknown APPx marker on bayer images

    Samples :

    - Embedded JPEG images in the DNG images here :
    
  https://www.photographyblog.com/previews/pentax_k1_photos
    

    Signed-off-by : Nick Renieris <velocityra@gmail.com>
    • [DH] libavcodec/mjpegdec.c

Navigation