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  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

Sur d’autres sites (7319)

  • VideoJS seekable().end(0) always returns 0

    18 septembre 2022, par Clovis Nyu

    I am trying to jump to a particular timestamp of a video, but using player.currentTime(someTime) always sends the video back to the start. Upon doing some research, I found that running player.seekable().end(0) always returns 0. I realize that this might be a problem with the fact that I'm using MP4, but I've tried using

    


    ffmpeg -i input.mp4 -c copy -movflags +faststart output.mp4


    


    to fix it and it doesn't work. Below is my code

    


    &#xA;&#xA;    &#xA;&#xA;&#xA;    <source src="http://localhost:8000/some_video.mp4" type="video/mp4"></source>&#xA;    <p class="vjs-no-js">&#xA;        To view this video please enable JavaScript, and consider upgrading to a&#xA;        web browser that&#xA;        <a href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5 video&#xA;    </a></p>&#xA;&#xA;&#xA;<button>Jump</button>&#xA;&#xA;<code class="echappe-js">&lt;script src=&quot;https://vjs.zencdn.net/7.7.5/video.js&quot;&gt;&lt;/script&gt;&#xA;&lt;script&gt;&amp;#xA;    var VIDEO_JS = videojs(&amp;#x27;my-video&amp;#x27;);&amp;#xA;&amp;#xA;    function jump() {&amp;#xA;        VIDEO_JS.currentTime(10);&amp;#xA;    }&amp;#xA;&lt;/script&gt;&#xA;&#xA;

    &#xA;

    For more context, the videos are taken from youtube, the audio is then split into vocals and accompaniment using spleeter, then ffmpeg is used to merge back the resulting audio files into the original video.

    &#xA;

    Any help would be appreciated. Thanks !

    &#xA;

  • libav/ffmpeg : avcodec_decode_video2() returns -1 when separating demultiplexing and decoding

    26 avril 2013, par unbekannt

    I'm using libav (from a C++ program on Linux and Windows) to decode video streams from a file, which works fine (decoding various formats like H264 and MPEG2) using avformat_open_input(), av_read_frame() and avcodec_decode_video2().

    Now I have to separate demultiplexing and decoding. One class will call avformat_open_input() and av_read_frame() and then pass the AVPackets into a queue that is read by another class. There I use avcodec_alloc_context3() to get the AVCodecContext needed for avcodec_decode_video2(). I've tested that with a MPEG2 video stream and it works.

    Problems arise if I try to decode a H264 stream : avcodec_decode_video2() always returns -1 and outputs "no frame". I understand that additional data (SPS/PPS) is needed to decode this stream, so I've tried to replicate the original AVCodecContext from the demultiplexer in the decoder, but it won't work :

    • Copying the content of the extradata field and setting all other values that differ from the default ones in the decoder : -1 is returned
    • Using the same context (i.e. passing along the pointer) results in a crash

    I also tried to set CODEC_FLAG2_CHUNKS. avcodec_decode_video2() then always returns packet.size - 3 (??) and frameFinished is never set to 1.

    In my opinion I have a general problem here that will arise whenever settings from the original CodecContext are needed to decode the AVPackets. I'd be grateful for any hints on how to solve that problem !

    EDIT : Sometimes writing down your problem helps solving it... Using a copy of the context struct (avcodec_copy_context) and opening the codec only after receiving the copy results in decoded frames. Does anyone know if that is safe or the best way to do it ?

  • FFMpeg create a video from a large number of images

    15 décembre 2016, par Herman Yanush

    So I have a directory, where script ran by cron puts photos from my webcam. And I want to make a sort of timelapse. So i want to join this images to a video, one image = new frame (no delay).

    So i have a jpg images filenamed

    YYYY-MM-DD_HH_MM-webcamshot.jpg

    And i want to join them into a mp4 video.

    I found out that i can do it with FFMpeg for ex. with this command

    ffmpeg -pattern_type glob -i '*.jpg' -c:v libx264 output.mp4 (from here)

    FFMpeg output log

    But unfortunately this only joins the first 600 (or a bit more) of 2.5K images in the directory.

    So i want to know :

    1. Can FFMpeg join more images (maybe unlimited amount) ?

    2. Is it problem of using -pattern type glob instead of wildcard ?

    3. If it can’t, how to split images into directories and make videos from these directories and then join or rename images to format like img01729.jog so wildcard img%04.jpg can be used ?

    FFMpeg on Linux Mint (ubuntu 16.04).

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