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Autres articles (41)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • 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" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (6508)

  • ffmpeg output parse in batch script

    3 juillet 2016, par vlad2005

    I am totally unfamiliar with scripts in Windows, but are forced to use such a script. I would like someone to help me with the following problem. I want to process the output from ffmpeg command to save information about access an webcam to be used later.
    More precisely command is following :

    ffmpeg -stats -hide_banner -list_devices true -f dshow -i dummy

    and output is like this :

    [dshow @ 02cec400] DirectShow video devices (some may be both video and audio devices)
    
[dshow @ 02cec400]  "Microsoft LifeCam Studio"
    
[dshow @ 02cec400]     Alternative name "@device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
    
[dshow @ 02cec400] DirectShow audio devices
    
[dshow @ 02cec400]  "Desktop Microphone (3- Studio -"
    
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -"
    
[dshow @ 02cec400]  "Line In (High Definition Audio "
    
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line In (High Definition Audio "
    
[dshow @ 02cec400]  "Microphone (High Definition Aud"
    
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (High Definition Aud"

    Typically, the first two occurence for ”Alternative name” from DirectShow correspond to video and audio, so for simplicity I want these two information saved in two variables.
    In this example is :

    @device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global

    and

    @device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -

    Can someone more experienced to help me with this task ?
    Thanks in advance !

  • ffmpeg output parse in batch script

    5 juin 2022, par vlad2005

    I am totally unfamiliar with scripts in Windows, but are forced to use such a script. I would like someone to help me with the following problem. I want to process the output from ffmpeg command to save information about access an webcam to be used later.
More precisely command is following :

    



    ffmpeg -stats -hide_banner -list_devices true -f dshow -i dummy


    



    and output is like this :

    



    [dshow @ 02cec400] DirectShow video devices (some may be both video and audio devices)
[dshow @ 02cec400]  "Microsoft LifeCam Studio"
[dshow @ 02cec400]     Alternative name "@device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 02cec400] DirectShow audio devices
[dshow @ 02cec400]  "Desktop Microphone (3- Studio -"
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -"
[dshow @ 02cec400]  "Line In (High Definition Audio "
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line In (High Definition Audio "
[dshow @ 02cec400]  "Microphone (High Definition Aud"
[dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (High Definition Aud"


    



    Typically, the first two occurence for ”Alternative name” from DirectShow correspond to video and audio, so for simplicity I want these two information saved in two variables.
In this example is :

    



    @device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global


    



    and

    



    @device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -


    



    Can someone more experienced to help me with this task ?
Thanks in advance !

    


  • Convert individual pixel values from RGB to YUV420 and save the frame - C++

    24 mars 2014, par learner

    I have been working with RGB->YUV420 conversion for sometime using the FFmpeg library. Already tried the sws_scale functionality but its not working well. Now, I have decided to convert each pixel individually, using colorspace conversion formulae. So, following is the code that gets me few frames and allows me to access individual R,G,B values of each pixel :

    // Read frames and save first five frames to disk
    
    i=0;
    
    while((av_read_frame(pFormatCtx, &packet)>=0) && (i<5)) 
    
    {
    
        // Is this a packet from the video stream?
    
        if(packet.stream_index==videoStreamIdx) 
    
        {   
    
            /// Decode video frame            
    
            avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
    

    
            // Did we get a video frame?
    
            if(frameFinished) 
    
            {
    
                i++;
    
                sws_scale(img_convert_ctx, (const uint8_t * const *)pFrame->data,
    
                          pFrame->linesize, 0, pCodecCtx->height,
    
                          pFrameRGB->data, pFrameRGB->linesize);
    

    
                int x, y, R, G, B;
    
                uint8_t *p = pFrameRGB->data[0];
    
                for(y = 0; y < h; y++)
    
                {  
    
                    for(x = 0; x < w; x++) 
    
                    {
    
                        R = *p++;
    
                        G = *p++;
    
                        B = *p++;
    
                        printf(" %d-%d-%d ",R,G,B);
    
                    }
    
                }
    

    
                SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height, i);
    
            }
    
        }
    

    
        // Free the packet that was allocated by av_read_frame
    
        av_free_packet(&packet);
    
    }

    I read online that to convert RGB->YUV420 or vice-versa, one should first convert to YUV444 format. So, its like : RGB->YUV444->YUV420. How do I implement this in C++ ?

    Also, here is the SaveFrame() function used above. I guess this will also have to change a little since YUV420 stores data differently. How to take care of that ?

    void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame)
    
{
    
    FILE *pFile;
    
    char szFilename[32];
    
    int  y;
    

    
    // Open file
    
    sprintf(szFilename, "frame%d.ppm", iFrame);
    
    pFile=fopen(szFilename, "wb");
    
    if(pFile==NULL)
    
        return;
    

    
    // Write header
    
    fprintf(pFile, "P6\n%d %d\n255\n", width, height);
    

    
    // Write pixel data
    
    for(y=0; ydata[0]+y*pFrame->linesize[0], 1, width*3, pFile);
    

    
    // Close file
    
    fclose(pFile);
    
}

    Can somebody please suggest ? Many thanks !!!

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