Recherche avancée

Médias (0)

Mot : - Tags -/images

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

Autres articles (96)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (5708)

  • FFmpeg overlaying image onto video fadeout than fadein not functioning

    15 août 2020, par Kursat Turkay

    got a video and png image as an overlay.
    
when I fade in at start of video and fade out at the end, the overlay works as expected.
    
but when I try to reverse the fade effect no error throws but output video does not show any overlay.

    


    ffmpeg -i input.mp4 -i overlay.png -filter_complex
"[1:0]format=rgba,fade=t=in:st=0:d=5:alpha=1,fade=t=out:st=95:d=5:alpha=1[my1]
 [0:0][my1]overlay=W-w-100:H-h-100:shortest=1"


    


    code above works as I expected. but what I want is reverse the effects. the code below not throws any error and produces a video. but no overlay shown at start or end or anywhere.

    


    code below what I guess should work. but not.

    


    ffmpeg -i input.mp4 -i overlay.png -filter_complex
"[1:0]format=rgba,fade=t=out:st=0:d=5:alpha=1,fade=t=in:st=95:d=5:alpha=1[my1]
 [0:0][my1]overlay=W-w-100:H-h-100:shortest=1"


    


    any clues ?

    


  • When creating a Xing or Info tag in an MP3, may I use any MP3 header or does it have to match other frames ?

    13 décembre 2019, par Alexis Wilke

    I have a set of bare MP3 files. Bare as in I removed all tags (no ID3, no Xing, no Info) from those files.

    Just before sending one of these files to the client, I want to add an Info tag. All of my files are CBR so we will use an Info tag (no Xing).

    Right now I get the first 4 bytes of the existing MP3 to get the Version (MPEG-1, Layer III), Bitrate, Frequency, Stereo Mode, etc. and thus determine the size of one frame. I create the tag that way, reusing these 4 bytes for the Info tag and determining the size of the frame.

    For those wondering, these 4 bytes may look like this :

    FF FB 78 04

    To me it felt like you are expected to use the exact same first 4 bytes in the Info tag as found in the other audio frames of the MP3, but when using ffmpeg, they stick an Info tag with a hard coded header (wrong bitrate, wrong frequency, etc.)

    My question is : Is ffmpeg really doing it right ? (LAME doesn’t do that) Could I do the same, skipping the load of the first 4 bytes and still have the greater majority of the players out there play my files as expected ?

    Note : since I read these 4 bytes over the network, it would definitely save a lot of time and some bandwidth to not have to load these 4 bytes on a HEAD request. Resources I could use for the GET requests instead...

  • How to see FFmpeg command MovePY uses ?

    16 novembre 2019, par user319862

    I am trying to figure out why moviepy doesn’t output expected results. How can I log the FFmpeg command that it uses so that I can compare ?

Navigation