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Autres articles (67)

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • 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 (...)

  • 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

Sur d’autres sites (10284)

  • Gstreamer : Hauppauge HD PVR and Multi-video file output

    7 juin 2014, par user3716978

    I have very specific requirements for a Gstreamer pipeline that I can’t seem to create. I’m running Linux Mint Mate 14 (Nadia).

    I have an HD PVR, which records in MPEG TS. It presents, as its interface, a V4L2 device at /dev/video0. What I need is to somehow have it output the captured video to multiple files. That is, like dvgrab’s autosplit, it would output, say, 1800 frames, then create a new output file, then capture another 1800, and on and on.

    I’ve tried numerous methods. First, using multifilesink with the keyframe next-file option does what I want, but it doesn’t seem to add stream headers to the segment files, so that they cannot play properly and/or are missing their initial keyframe.

    I’ve tried limiting each individual capture length using num-buffers, and just restarting the capture after the previous one ends. This works for maybe 30 or 40 files but all the switching on and off eventually locks up the HD PVR, and it has to be power-cycled.

    I could also have it dump images to the disk and work with the individual frames, but this is very slow with MPEG TS since it has to demux, decode, and reencode every frame. It eats up 100% cpu and drops about 60% of the frames on my computer.

    ffmpeg doesn’t work, because the HD PVR driver doesn’t support ioctl. I can’t seem to get mencoder to stream it this way either, but maybe it’s possible ?

    What I need is to :

    • Have a single capture stream, to avoid pissing off the HD PVR
    • Have it split the stream into multiple files which can be individually analyzed
    • Have those multiple files be valid videos
    • Not eat up 100% of my CPU (although high utilization is ok, it needs to run at full speed). Since the stream is 1920x1080x60fps, anything to do with reencoding won’t work. It pretty much needs to be a stream copy.

    Thank you

  • Export frames/images from compressed video

    24 mars 2015, par Jan Viehweger

    I have a compressed movie (mp4) and I want to extract every single frame / image from it. I know that each individual frame of the video only contains the changed pixels regarding to the last keyframe, because of the video compression. But that is exactly what I want. I just want to see those differences. I want to visualy see how the compressor works.

    Is there some tool like imagemagick out there what can things like that ?

  • Is there a way to extract every nth frame from an online video without downloading the entire video ?

    13 avril 2018, par Arif

    I’m looking for a website or app that lets you to download individual frames from a video as jpg without downloading the full thing. If there is no such website or app, is it possible via ffmpeg ?

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