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Mot : - Tags -/spip

Autres articles (26)

  • Contribute to translation

    13 avril 2011

    You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
    To do this, we use the translation interface of SPIP where the all the language modules of MediaSPIP are available. Just subscribe to the mailing list and request further informantion on translation.
    MediaSPIP is currently available in French and English (...)

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
    Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
    La documentation de l’utilisation du script d’installation (...)

  • 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 (3626)

  • What is the most performant way to render unmanaged video frames in WPF ?

    27 mai 2017, par superware

    I’m using FFmpeg library to receive and decode H.264/MPEG-TS over UDP with minimal latency (something MediaElement can’t handle).

    On a dedicated FFmpeg thread, I’m pulling PixelFormats.Bgr32 video frames for display. I’ve already tried InteropBitmap :

    _section = CreateFileMapping(INVALID_HANDLE_VALUE, IntPtr.Zero, PAGE_READWRITE, 0, size, null);
    
_buffer = MapViewOfFile(_section, FILE_MAP_ALL_ACCESS, 0, 0, size);
    
Dispatcher.Invoke((Action)delegate()
    
{
    
    _interopBitmap = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(_section, width, height, PixelFormats.Bgr32, (int)size / height, 0);
    
    this.Source = _interopBitmap;
    
});

    And then per frame update :

    Dispatcher.Invoke((Action)delegate()
    
{
    
    _interopBitmap.Invalidate();
    
});

    But performance is quite bad (skipping frames, high CPU usage etc).

    I’ve also tried WriteableBitmap : FFmpeg is placing frames in _writeableBitmap.BackBuffer and per frame update :

    Dispatcher.Invoke((Action)delegate()
    
{
    
    _writeableBitmap.Lock();
    
});
    
try
    
{
    
    ret = FFmpegInvoke.sws_scale(...);
    
}
    
finally
    
{
    
    Dispatcher.Invoke((Action)delegate()
    
    {
    
        _writeableBitmap.AddDirtyRect(_rect);
    
        _writeableBitmap.Unlock();
    
    });
    
}

    Experiencing almost the same performance issues (tested with various DispatcherPriority).

    Any help will be greatly appreciated.

  • What is the most performant way to render unmanaged video frames in WPF ?

    18 avril 2017, par superware

    I’m using FFmpeg library to receive and decode H.264/MPEG-TS over UDP with minimal latency (something MediaElement can’t handle).

    On a dedicated FFmpeg thread, I’m pulling PixelFormats.Bgr32 video frames for display. I’ve already tried InteropBitmap :

    _section = CreateFileMapping(INVALID_HANDLE_VALUE, IntPtr.Zero, PAGE_READWRITE, 0, size, null);
    
_buffer = MapViewOfFile(_section, FILE_MAP_ALL_ACCESS, 0, 0, size);
    
Dispatcher.Invoke((Action)delegate()
    
{
    
    _interopBitmap = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(_section, width, height, PixelFormats.Bgr32, (int)size / height, 0);
    
    this.Source = _interopBitmap;
    
});

    And then per frame update :

    Dispatcher.Invoke((Action)delegate()
    
{
    
    _interopBitmap.Invalidate();
    
});

    But performance is quite bad (skipping frames, high CPU usage etc).

    I’ve also tried WriteableBitmap : FFmpeg is placing frames in _writeableBitmap.BackBuffer and per frame update :

    Dispatcher.Invoke((Action)delegate()
    
{
    
    _writeableBitmap.Lock();
    
});
    
try
    
{
    
    ret = FFmpegInvoke.sws_scale(...);
    
}
    
finally
    
{
    
    Dispatcher.Invoke((Action)delegate()
    
    {
    
        _writeableBitmap.AddDirtyRect(_rect);
    
        _writeableBitmap.Unlock();
    
    });
    
}

    Experiencing almost the same performance issues (tested with various DispatcherPriority).

    Any help will be greatly appreciated.

  • How to open MIL avi video fiile

    12 février 2017, par ahme0307

    I have some (AVI) videos with MIL(Matrox Imaging Library) codec. I have tried multiple codecs but i am not able to open.
    I have tried VLC, K-lite codecs,ffmpeg, here is the log file from k-Lite

    >##LAV Splitter Source (internal)::Video
    
>
    
>Media Type 0:
    
>--------------------------
    
>Video: MIL  256x256 5fps 489kbps
    
>AM_MEDIA_TYPE: 
    
>majortype: MEDIATYPE_Video {73646976-0000-0010-8000-00AA00389B71}
    
>subtype: Unknown GUID Name {204C494D-0000-0010-8000-00AA00389B71}
    
>formattype: FORMAT_VideoInfo {05589F80-C356-11CE-BF01-00AA0055595A}
    
>bFixedSizeSamples: 0
    
>bTemporalCompression: 1
    
>lSampleSize: 1
    
>cbFormat: 128
    
>
    
>VIDEOINFOHEADER:
    
>rcSource: (0,0)-(256,256)
    
>rcTarget: (0,0)-(256,256)
    
>dwBitRate: 489508
    
>dwBitErrorRate: 0
    
>AvgTimePerFrame: 2000000
    
>
    
>BITMAPINFOHEADER:
    
>biSize: 80
    
>biWidth: 256
    
>biHeight: 256
    
>biPlanes: 1
    
>biBitCount: 24
    
>biCompression: MIL 
    
>biSizeImage: 196608
    
>biXPelsPerMeter: 0
    
>biYPelsPerMeter: 0
    
>biClrUsed: 0
    
>biClrImportant: 0
    
>
    
>pbFormat:
    
>
    
>

    I also tried ffplay and here is the output
    enter image description here

    The only software i came across that can open this video is from Matrox and it doesn’t allow exporting to other formats
    enter image description here
    I appreciate if some one can direct me to codecs that can handle this videos. I would like convert to other video formats for further processing.

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