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Médias (91)

Autres articles (26)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • La sauvegarde automatique de canaux SPIP

    1er avril 2010, par

    Dans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
    Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)

Sur d’autres sites (5125)

  • Livestream WebVTT with HLS

    10 novembre 2022, par kltye

    I've implemented an HLS service with ffmpeg (which pulls a live stream from nginx-rtmp). That all works fine, but now I'm wondering what kind of programming pattern I should be using to get live captioning to work.

    


    I'm planning on using ffmpeg to output the incoming mp4 stream to multiple WAV chunks (i.e., the same way HLS fMP4 parts are created), and then sending those chunks over to Azure Cognitive Services for speech-to-text recognition. My question is, what do I do when I receive the speech results ? Do I dump that vtt file into the same directory as my HLS chunks, and then serve that up using a single m3u8 file (with audio/video tracks along with the text track) ?

    


    Currently ffmpeg is updating the m3u8 playlist for HLS clients ; would it be possible for me to create the m3u8 playlist just for the vtt files, and serve that concurrently with the "regular" HLS playlist ? Also, time synchronization would seem to be difficult, because I'll be sending discrete WAV files over to Azure, so the vtt timestamps are going to be relative to the chunk I'm sending.

    


    Help ! I've done searches online, and I grasp the various issues, but I'm not sure how to plumb them all together.

    


  • Server side video merging with FFmpeg through oline form

    1er août 2017, par San007

    I have a difficult problem and not enough knowledge to solve it, therefore I am hoping you guys can give me some advice or redirect me to a professional or professional software which can solve my problem.

    I want something fairly simple but I simply do not know how to begin. I Googled extensively but didnt find any related topics.

    What do I want ?
    I want an online form on my website where people can select different options, which are videos, for example
    Question 1
    1 (1.mp4) / 2 (2.mp4) / 3 (3.mp4)
    Question 2
    X (X.mp4) / Y (Y.mp4) / Z (Z.mp4)
    Question 3
    Email adres :
    Generate

    When the visitor clicks the generator button it should merge the video’s the customer has selected. e.g. 1 and X will result in one video file of 1.mp4 and X.mp4 merged. The system should then after succesfully merging the videos send a download link to the users e-mail adres and ideally delete the video from the server afterwards.

    I know I have not done a whole lot of research because my knowledge simply is not enough to create my own solution, but I hope you guys can send me in the right direction, I do not mind any commercial solution.

  • "Transcode" copying video/audio codec

    22 septembre 2012, par JunCTionS

    I took some very shaky video, and went online to try and find how to stabilize it. I came upon this nice blog that uses transcode for it.
    Following the blog instructions it worked very nice, but the end result had a lot of compression artifacts. This I imagine is mostly due to using xvid as a new codec.

    My intention is reuse the codec the camera originally used which is H.264/AVC but I haven't found a way of doing so (ran into various dead ends using either encoder -y mov... or -y ffpmeg.

    In particular when using -y ffmpeg -F "-vcodec copy -acodec copy" it prints out :

    [export_ffmpeg.so] warning: Video template standard must be one of pal/ntsc

    but running

    ffmpeg -i input.mov -vcodec copy -acodec copy output.mov

    Presents no problem.

    Any idea on how to do this ? or an alternative to stabilize video on linux ?.

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