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  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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 (...)

Sur d’autres sites (7246)

  • Image sequence to video stream ?

    22 août 2015, par Hauns TM

    Like many people already seem to have (there are several threads on this subject here) I am looking for ways to create video from a sequence of images.

    I want to implement my functionality in C# !

    Here is what I wan’t to do :

    /*Pseudo code*/
    
void CreateVideo(List<image> imageSequence, long durationOfEachImageMs, string outputVideoFileName, string outputFormat)
    
{
    
    // Info: imageSequence.Count will be > 30 000 images
    
    // Info: durationOfEachImageMs will be &lt; 300 ms
    

    
    if (outputFormat = "mpeg")
    
    {
    
    }
    
    else if (outputFormat = "avi")
    
    {      
    
    }
    
    else
    
    {
    
    }
    

    
    //Save video file do disk
    
}
    
</image>

    I know there’s a project called Splicer (http://splicer.codeplex.com/) but I can’t find suitable documentation or clear examples that I can follow (these are the examples that I found).

    The closest I want to do, which I find here on CodePlex is this :
    How can I create a video from a directory of images in C# ?

    I have also read a few threads about ffmpeg (for example this : C# and FFmpeg preferably without shell commands ? and this : convert image sequence using ffmpeg) but I find no one to help me with my problem and I don’t think ffmpeg-command-line-style is the best solution for me (because of the amount of images).

    I believe that I can use the Splicer-project in some way (?).

    In my case, it is about about > 30 000 images where each image should be displayed for about 200 ms (in the videostream that I want to create).

    (What the video is about ? Plants growing ...)

    Can anyone help me complete my function ?

  • How to write RTP/H264 stream as a file

    2 octobre 2012, par Jun

    I couldn't find a solution for my previous question so I decided to try it step by step.

    The thing that I wanna do now is to store the RTP/H264 stream as a file.

    What I found so far is the below :

    (firstly my RTP/H264 is FU-A which is the form of)

    | RTP HEADER 12bytes long | FU INDICATOR 1byte | FU HEADER 1byte | FU payload |

    As I understood RFC 6184 document, I'm starting a NAL with a packet which has '1' at the first bit of FU Header and appending following packets that set '0' at the first bit until the last packet which has '1' at the second bit of FU Header.

    I think that's how to get a complete NAL before the FU-A packetization and also what I found is I need to put the 'starting bits' (0x00000001) at the front of each complete NAL.

    But no luck so far. The below is part of log

     ========= the new NAL is as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]7C/1111100 [5]85/10000101 [6]B8/10111000 [7]40/1000000 ...
    
 ========= adding the next NAL as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]7C/1111100 [5]85/10000101 [6]B8/10111000 [7]40/1000000 ...
    
 ========= adding the next NAL as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]7C/1111100 [5]85/10000101 [6]B8/10111000 [7]40/1000000 ...
    
 ========= adding the next NAL as 716
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]7C/1111100 [5]85/10000101 [6]B8/10111000 [7]40/1000000 ...
    
 ========= a NAL is summed up as 4866
    
 ========= the new NAL is as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E2/11100010 [7]20/100000 ...
    
 ========= adding the next NAL as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E2/11100010 [7]20/100000 ...
    
 ========= adding the next NAL as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E2/11100010 [7]20/100000 ...
    
 ========= adding the next NAL as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E2/11100010 [7]20/100000 ...
    
 ========= adding the next NAL as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E2/11100010 [7]20/100000 ...
    
 ========= adding the next NAL as 139
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E2/11100010 [7]20/100000 ...
    
 ========= a NAL is summed up as 7061
    
 ========= the new NAL is as 1377
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]41/1000001 [5]E4/11100100 [6]40/1000000 [7]1A/11010 ...
    
 ========= a NAL is summed up as 1369
    
 ========= the new NAL is as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E6/11100110 [7]60/1100000 ...
    
 ========= adding the next NAL as 94
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]E6/11100110 [7]60/1100000 ...
    
 ========= a NAL is summed up as 1472
    
 ========= the new NAL is as 447
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]41/1000001 [5]E8/11101000 [6]80/10000000 [7]16/10110 ...
    
 ========= a NAL is summed up as 439
    
 ========= the new NAL is as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]EA/11101010 [7]A0/10100000  ...
    
 ========= adding the next NAL as 1174
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]EA/11101010 [7]A0/10100000 ...
    
 ========= a NAL is summed up as 2552
    
 ========= the new NAL is as 1400
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]EC/11101100 [7]C0/11000000 ...
    
 ========= adding the next NAL as 1364
    
 [0]0/0 [1]0/0 [2]0/0 [3]1/1 [4]5C/1011100 [5]81/10000001 [6]EC/11101100 [7]C0/11000000 ...
    
 ========= a NAL is summed up as 2742
    
 ========= the new NAL is as 1400
    
 ...

    my question is,

    1. if I can get the complete NALs from the fragmented packets by FU-A, how can I make it as a file which is able to run by VLC or other player ?

    2. I'm still confused if I have to keep the FU indicator and FU header or not. Somebody said I need to take them only for the very first packet (starting with '1' at the FU header)

    Any advice will be really appreciated.

    Thanks.

  • Android : How to change audio tempo and pitch individuality using ffmpeg ?

    16 juillet 2012, par Vipul Purohit

    I have managed to play audio files using ffmpeg and AudioTrack class in my android project. I can change the speed of audio using AudioTrack class setRate method. But it also change the pitch of audio, I want to change only Tempo of audio but I found no solution on net.

    anyone can please help me on this as there is no support for this.

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