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  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

Sur d’autres sites (3036)

  • FFmpeg concat produces bad Video

    6 mars 2019, par Amorphis

    I have installed ffmpeg on a microsoft/dotnet:2.2-aspnetcore-runtime docker container using
    1.apt-get update
    2.apt-get install ffmpeg.

    seems to be installed fine, but when I try and use it as such
    ffmpeg -f concat -i /data/mylist.txt -c : copy /data/output.mp4

    the output is that the first video part is ok, but the second colors are all messy (hard to explain) and when I change the order of the videos in the list still the first in the list is ok and the second is messed up.

    p.s same settings on a different machine works (ffmpeg for ubuntu)

    bad

    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55ccbcce90c0] Auto-inserting h264_mp4toannexb bitstream filter
    
Input #0, concat, from '/data/mylist.txt':
    
  Duration: N/A, start: 0.000000, bitrate: 14915 kb/s
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 14915 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    
    Metadata:
    
      creation_time   : 2014-10-17T04:06:30.000000Z
    
      handler_name    : GPAC ISO Video Handler
    
Output #0, mp4, to '/data/output.mp4':
    
  Metadata:
    
    encoder         : Lavf57.56.101
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 14915 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc
    
    Metadata:
    
      creation_time   : 2014-10-17T04:06:30.000000Z
    
      handler_name    : GPAC ISO Video Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)

    good

    Input #0, concat, from '/data/mylist.txt':
    
  Duration: N/A, start: 0.000000, bitrate: 14915 kb/s
    
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 14915 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    
    Metadata:
    
      creation_time   : 2014-10-17T04:06:30.000000Z
    
      handler_name    : GPAC ISO Video Handler
    
Output #0, mp4, to '/data/outGood1.mp4':
    
  Metadata:
    
    encoder         : Lavf58.20.100
    
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 14915 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc
    
    Metadata:
    
      creation_time   : 2014-10-17T04:06:30.000000Z
    
      handler_name    : GPAC ISO Video Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)

  • 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 !!!

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