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Autres articles (83)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • 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" (...)

Sur d’autres sites (14120)

  • FFMPEG script to merge multiple videos and a background image

    3 février 2021, par BitBit

    I have 30 clips which are different in aspect ratio(like some videos are 10801920(they are vertical) and some are 1280720(horizontal aspect ratio videos). I want to merge all of them but also have a static background image that is of 1920x1080 aspect ratio. The video would be such that all the clips are concatenated but they have a background image(just like those tiktok compilation videos on youtube). Can someone please help me with this program ?

    


  • FFMPEG DASH Exemple

    23 janvier 2021, par Diogo Crava

    Would anyone be able to provide me an example of an FFMPEG command converting a simple .mp4 file into DASH format but with segmentation for each resolution (480, 720 and 1080). I found some examples but none of them had segmentation.

    


    Can you also indicate to me which field allows me to do that ?

    


    I would also appreciate it if you gave me an FFMPEG tutorial besides the documentation alone.

    


  • FFMpeg RGB32 to NV12 using SWScale

    28 avril 2016, par KevinA

    I’m trying to convert RGB32 frames to NV12 Frames to feed into an encoder.

    m_iWidthIn = 1920;
    
m_iHeightIn = 1080;
    
m_iWidthOut = (((iWidthIn  + 31) >> 5) << 5) //32bit align
    
m_heightOut = (((iHeightIn + 31) >> 5) << 5) //32bit align
    
m_outputPixelFormat = AV_PIX_FMT_NV12;
    

    
// allocate and fill buffers
    

    
m_sws = ::sws_getContext(m_iWidthIn, m_iHeightIn, AV_PIX_FMT_RGB32, m_iWidthOut, m_iHeightOut, m_outputPixelFormat, SWS_FAST_BILINEAR, nullptr, nullptr, nullptr);
    
AVFrame* frameOut = av_frame_alloc();
    
frameOut->height = m_iHeightOut;
    
frameOut->width = m_iWidthOut;
    
frameOut->format = m_outputPixelFormat;
    
av_frame_get_buffer(frameOut, 32);
    
int linesize[1] = { m_iWidthIn * 4 };
    
uint8_t * data[1] = { m_inputBuffer  };
    
if (m_bFlip)
    
{
    
    data[0] += linesize[0] * (m_iHeightIn - 1);
    
    linesize[0] = -linesize[0];
    
}
    
::sws_scale(m_sws, data, linesize, 0, m_iHeightIn, frameOut->data, frameOut->linesize);
    
::av_image_copy_to_buffer(pOutputBuffer, lDataLen, frameOut->data, frameOut->linesize, m_outputPixelFormat, m_iWidthOut, m_iHeightOut, 32);

    If I make m_outputPixelFormat AV_PIX_FMT_RGB32 and use a DMO colorspace converter, the video comes out correctly. However if I change it to NV12, I end up with a slanted video with missing data at the bottom.
    I know this is caused by me copying the data incorrectly out of the buffer, but I’m unsure what I’m doing incorrectly.

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