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  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 est la première version de MediaSPIP stable.
    Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • 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" (...)

  • Mise à disposition des fichiers

    14 avril 2011, par

    Par défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
    Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
    Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)

Sur d’autres sites (10074)

  • MPEG-4 and alpha transparency - the ongoing saga

    6 décembre 2022, par OrangeDog

    I'd like to reach some sort of definitive answer for the following questions :

    



      

    1. Is alpha transparency supported in MPEG-4-based codecs ?

      2. 


    2. Is there any way to be reasonably certain that there is no alpha-channel from the output of ffprobe ?

      3. 


    



    Some links I've found on the subject :

    



    



    


    Also, transparent alpha layers, an optional part of the H.264 specification, are now supported in H.264-based QuickTime movies.

    


    



    



    


    The support for alpha channel in the H.264 decoder is now available in Intel® Integrated Performance Primitives 6.0 version.

    


    



    



    


    The MPEG4 Simple Studio Profile supports auxiliary channels, which could be used for alpha or depth — and presumably even displacement, motion vectors, normals, etc.

    


    



    However, I've never seen a concrete example, or indeed any details on how you use these announced features.

    


  • RTMP server can't stream video (only audio)

    20 janvier 2020, par Jeffrey

    I’m implementing an RTMP server right now, and everything’s been working except for video streaming. I can stream audio with no problems (using OBS to stream), and play it back via VLC. The problem is VLC plays the audio, but no video. What I’m doing right now is forwarding every audio and video message I receive from OBS, I grab the original payload (audio/video data) and put in a Type 0 Chunk, since I’ve seen pretty much every implementation do this. I don’t know if I’m missing some sort of processing that should be done on the video data.

    If I try to playback with ffmpeg (saving the RTMP stream to an flv file), then I get this output :

    [NULL @ 000001eb053ed440] missing picture in access unit with size 5209
    [AVBSFContext @ 000001eb053ecbc0] No start code is found.
    rtmp://192.168.1.2/app/publish: could not find codec parameters
    Input #0, flv, from 'rtmp://192.168.1.2/app/publish':
     Duration: N/A, start: 0.000000, bitrate: N/A
       Stream #0:0: Data: none
       Stream #0:1: Video: h264, none, 1k tbn
    Output #0, flv, to 'av.flv':
    Output file #0 does not contain any stream

    It says missing picture in access unit with size 5209, No start code is found, and could not find codec parameters. What am I missing here ? I know I’m forwarding the payload exactly as I’ve received it in my server, I even did a hash check on the video payload I’m receiving and the one I’m sending and it’s exactly the same. Any help would be greatly appreciated.

  • mp4 generated by moviepy no sound with tweepy

    2 décembre 2020, par Will Rowe

    I'm using MoviePy to edit a mp4 file and then Tweepy to tweet out the video.

    


    Here's what I have currently :

    


    clip = VideoFileClip("c:/users/.../UNIQUENAME2.mp4").subclip(8) #cut off the first 8 seconds of the clip
clip.write_videofile("c:/users/.../UNIQUENAME2-finished.mp4")
clip.close()
highlightz = TweetMachine()
highlightz.makeAVidTweet('c:/users/.../UNIQUENAME2-finished.mp4','audio test')


    


    Here's my TweetMachine :

    


    def makeAVidTweet(self,fileLoc,text):
        upload_result = self.api.media_upload(fileLoc)
        time.sleep(120) #wait just in case things are still processing
        media_ids = [upload_result.media_id_string]
        self.api.update_status(status=text, media_ids=media_ids)


    


    Currently, the video is cut fine and UNIQUENAME2-finished.mp4 is constructed correctly such that if I open the file on my computer, the video is cut correctly and the sound works. However, the video posted on Twitter has no sound.

    


    I'm assuming it's some sort of issue with how MoviePy makes the mp4 file and Twitter not liking something with the sound settings, but I'm pretty unfamiliar with mp4 stuff and I couldn't find anything about it on the MoviePy or Tweepy docs.

    


    Any tips or thoughts would be greatly appreciated !

    


    Stream info from VLC :
Codec : MPEG Audio layer 1/2 (mpga),
Type : Audio,
Channels : Stereo,
Sample Rate : 44100 Hz,
Bits per sample : 32,
Bitrate : 128 kb/s

    


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