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  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

Sur d’autres sites (4596)

  • ffmpeg doesn't recognize Quicktime DV codec

    8 août 2017, par 3pointedit

    I have had success with excellent advice, on a Mac OSX10.5, converting a modified MXF media structure to h264 while retaining multitrack audio. But I cannot get ffmpeg to work in Windows environment.

    See this page.

    Here’s the result of latest failure-

    Microsoft Windows [Version 6.1.7601]
    
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
    

    
F:\>h:
    

    
H:\>cd conversion folder
    

    

    
H:\Conversion folder>ffmpeg ffmpeg -report -enable_drefs 1 -use_absolute_path 1
    
-i fdb9_AerialsEagleFarm_0610.mov -map 0:v -map 0:a -write_tmcd 1 fd9_AerialsEag
    
leFarm_A0609.mp4
    
ffmpeg started on 2017-08-08 at 15:01:24
    
Report written to "ffmpeg-20170808-150124.log"
    
ffmpeg version N-86950-g1bef008 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 7.1.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
    
nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
    
enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
    
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
    
bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
    
-enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
    
e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
    
bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
    
e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
    
 --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
    
-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
  libavutil      55. 70.100 / 55. 70.100
    
  libavcodec     57.102.100 / 57.102.100
    
  libavformat    57. 76.100 / 57. 76.100
    
  libavdevice    57.  7.100 / 57.  7.100
    
  libavfilter     6. 98.100 /  6. 98.100
    
  libswscale      4.  7.102 /  4.  7.102
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] Opening 'video.vid' for reading
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] stream 0, error opening alias: path
    
='/VibrintAVFiles/Xchange In/fdb9_AerialsEagleFarm_0610.vmf/video.vid', dir='fdb
    
9_AerialsEagleFarm_0610.vmf', filename='video.vid', volume='default', nlvl_from=
    
1, nlvl_to=1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] Opening 'audio_0.pcm' for reading
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] stream 1, error opening alias: path
    
='/VibrintAVFiles/Xchange In/fdb9_AerialsEagleFarm_0610.vmf/audio_0.pcm', dir='f
    
db9_AerialsEagleFarm_0610.vmf', filename='audio_0.pcm', volume='default', nlvl_f
    
rom=1, nlvl_to=1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] Opening 'audio_1.pcm' for reading
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] stream 2, error opening alias: path
    
='/VibrintAVFiles/Xchange In/fdb9_AerialsEagleFarm_0610.vmf/audio_1.pcm', dir='f
    
db9_AerialsEagleFarm_0610.vmf', filename='audio_1.pcm', volume='default', nlvl_f
    
rom=1, nlvl_to=1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] Opening 'audio_2.pcm' for reading
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] stream 3, error opening alias: path
    
='/VibrintAVFiles/Xchange In/fdb9_AerialsEagleFarm_0610.vmf/audio_2.pcm', dir='f
    
db9_AerialsEagleFarm_0610.vmf', filename='audio_2.pcm', volume='default', nlvl_f
    
rom=1, nlvl_to=1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] Opening 'audio_3.pcm' for reading
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] stream 4, error opening alias: path
    
='/VibrintAVFiles/Xchange In/fdb9_AerialsEagleFarm_0610.vmf/audio_3.pcm', dir='f
    
db9_AerialsEagleFarm_0610.vmf', filename='audio_3.pcm', volume='default', nlvl_f
    
rom=1, nlvl_to=1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000005c99a0] Could not find codec parameters for
    
 stream 0 (Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 kb/s): unspe
    
cified pixel format
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Guessed Channel Layout for Input Stream #0.1 : mono
    
Guessed Channel Layout for Input Stream #0.2 : mono
    
Guessed Channel Layout for Input Stream #0.3 : mono
    
Guessed Channel Layout for Input Stream #0.4 : mono
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'fdb9_AerialsEagleFarm_0610.mov':
    
  Metadata:
    
    creation_time   : 2016-10-06T07:01:58.000000Z
    
  Duration: 00:12:43.90, start: 0.000000, bitrate: 1 kb/s
    
    Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), none, 720x576, 28800 k
    
b/s, SAR 118:81 DAR 295:162, 25 fps, 25 tbr, 2500 tbn, 2500 tbc (default)
    
    Metadata:
    
      creation_time   : 2016-10-06T07:01:58.000000Z
    
      handler_name    : Apple Alias Data Handler
    
      timecode        : 01:17:27:12
    
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16,
    
 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-06T07:01:58.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16,
    
 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-06T07:01:58.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16,
    
 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-06T07:01:58.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16,
    
 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-06T07:01:58.000000Z
    
      handler_name    : Apple Alias Data Handler
    
    Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2016-10-06T07:01:58.000000Z
    
      handler_name    : Apple Handle Data Handler
    
      timecode        : 01:17:27:12
    
[NULL @ 00000000005cad20] Unable to find a suitable output format for 'ffmpeg'
    
ffmpeg: Invalid argument

    And a screen grab of file structure (although I’m using an alias for target)

    alt mxf media

  • 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 !!!

  • 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 !

    


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