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    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
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    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Ecrire une actualité

    21 juin 2013, par

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Sur d’autres sites (8265)

  • ffmpeg + glfwGetTime()

    3 septembre 2013, par Javier Ramírez

    I try to control the playback speed of my video using ffmpeg + opengl. But I have problems.

    My video is encoded at 25 fps and plays very fast. I added this in my code.

    tiempo = glfwGetTime();
    
duracion = 1.0/25.0; // 1 second / 25 fps
    

    
while(1){
    

    
...        
    

    
  if(glfwGetTime() > tiempo + duracion){
    
    if(av_read_frame(pFormatCtx,&packet) >= 0){
    
      if(packet.stream_index == 0){
    
        avcodec_decode_video2(pCodecCtx,pFrame,&frameFin,&packet);
    
        if(frameFin)sws_scale(img_convert_ctx,pFrame->data,pFrame->linesize,0,pCodecCtx->height,pFrameRGB->data,pFrameRGB->linesize);
    
      }
    
      av_free_packet(&packet);
    
    }
    
    tiempo = glfwGetTime();
    
  }
    

    
...
    

    
}

    The problem is that now the video plays slower than it should. What is the problem ?

  • switch between video streaming

    23 juin 2017, par user1225084

    I am struggling with switching between multiple live streams. For example, I have five live streaming servers streaming(HTTP or RTSP) and I want to put some broker between those (five) streaming sources and destination so that output to the destination would be one video streaming (later I may change the streaming source again using switch). Broker plays role of switcher, My question is, is there such open source "switcher" ? Or how this technology works ?

    here is link to similar question but I want some open source or some brief guidance about how it could be implemented : http://forums.creativecow.net/thread/117/858680

    Thank You in advance

  • Adding some kind of subtitle to an mp4 with ffmpeg

    23 juin 2017, par Steven Van Ingelgem

    I have a subtitle (it certainly looks like it), but I don’t know how to add it into an MP4 I’m creating.
    First a hexdump of the subtitle :

    00000000  00 00 00 18 66 74 79 70  69 73 6f 36 00 00 00 00  |....ftypiso6....|
    
00000010  69 73 6f 36 64 61 73 68  00 00 00 28 66 72 65 65  |iso6dash...(free|
    
00000020  55 53 50 20 62 79 20 43  6f 64 65 53 68 6f 70 11  |USP by CodeShop.|
    
00000030  11 11 11 11 11 11 11 11  11 11 11 11 11 11 11 11  |................|
    
00000040  00 00 02 1d 6d 6f 6f 76  00 00 00 6c 6d 76 68 64  |....moov...lmvhd|
    
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 01  |................|
    
00000060  00 00 00 00 00 01 00 00  01 00 00 00 00 00 00 00  |................|
    
00000070  00 00 00 00 00 01 00 00  00 00 00 00 00 00 00 00  |................|
    
*
    
00000090  00 00 00 00 40 00 00 00  00 00 00 00 00 00 00 00  |....@...........|
    
000000a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    
000000b0  00 00 00 02 00 00 01 81  74 72 61 6b 00 00 00 5c  |........trak...\|
    
000000c0  74 6b 68 64 00 00 00 07  00 00 00 00 00 00 00 00  |tkhd............|
    
000000d0  00 00 00 01 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    
000000e0  00 00 00 00 00 00 00 00  00 00 00 00 00 01 00 00  |................|
    
*
    
00000100  00 00 00 00 00 00 00 00  00 00 00 00 40 00 00 00  |............@...|
    
00000110  00 00 00 00 00 00 00 00  00 00 01 1d 6d 64 69 61  |............mdia|
    
00000120  00 00 00 20 6d 64 68 64  00 00 00 00 00 00 00 00  |... mdhd........|
    
00000130  00 00 00 00 00 00 03 e8  00 00 00 00 39 84 00 00  |............9...|
    
00000140  00 00 00 35 68 64 6c 72  00 00 00 00 00 00 00 00  |...5hdlr........|
    
00000150  73 75 62 74 00 00 00 00  00 00 00 00 00 00 00 00  |subt............|
    
00000160  55 53 50 20 53 75 62 74  69 74 6c 65 20 48 61 6e  |USP Subtitle Han|
    
00000170  64 6c 65 72 00 00 00 00  c0 6d 69 6e 66 00 00 00  |dler.....minf...|
    
00000180  0c 73 74 68 64 00 00 00  00 00 00 00 24 64 69 6e  |.sthd.......$din|
    
00000190  66 00 00 00 1c 64 72 65  66 00 00 00 00 00 00 00  |f....dref.......|
    
000001a0  01 00 00 00 0c 75 72 6c  20 00 00 00 01 00 00 00  |.....url .......|
    
000001b0  88 73 74 62 6c 00 00 00  3c 73 74 73 64 00 00 00  |.stbl.../www.|
    
000001e0  77 33 2e 6f 72 67 2f 6e  73 2f 74 74 6d 6c 00 00  |w3.org/ns/ttml..|
    
000001f0  00 00 00 00 10 73 74 74  73 00 00 00 00 00 00 00  |.....stts.......|
    
00000200  00 00 00 00 10 73 74 73  63 00 00 00 00 00 00 00  |.....stsc.......|
    
00000210  00 00 00 00 14 73 74 73  7a 00 00 00 00 00 00 00  |.....stsz.......|
    
00000220  00 00 00 00 00 00 00 00  10 73 74 63 6f 00 00 00  |.........stco...|
    
00000230  00 00 00 00 00 00 00 00  28 6d 76 65 78 00 00 00  |........(mvex...|
    
00000240  20 74 72 65 78 00 00 00  00 00 00 00 01 00 00 00  | trex...........|
    
00000250  01 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    
00000260  18 73 74 79 70 69 73 6f  36 00 00 00 00 69 73 6f  |.stypiso6....iso|
    
00000270  36 6d 73 64 68 00 00 00  28 66 72 65 65 55 53 50  |6msdh...(freeUSP|
    
00000280  20 62 79 20 43 6f 64 65  53 68 6f 70 11 11 11 11  | by CodeShop....|
    
00000290  11 11 11 11 11 11 11 11  11 11 11 11 11 00 00 00  |................|
    
000002a0  2c 73 69 64 78 00 00 00  00 00 00 00 01 00 00 03  |,sidx...........|
    
000002b0  e8 00 00 00 00 00 00 00  00 00 00 00 01 00 00 0f  |................|
    
000002c0  09 00 00 ea 60 90 00 00  00 00 00 00 68 6d 6f 6f  |....`.......hmoo|
    
000002d0  66 00 00 00 10 6d 66 68  64 00 00 00 00 00 00 00  |f....mfhd.......|
    
000002e0  01 00 00 00 50 74 72 61  66 00 00 00 14 74 66 68  |....Ptraf....tfh|
    
000002f0  64 00 02 00 02 00 00 00  01 00 00 00 01 00 00 00  |d...............|
    
00000300  14 74 66 64 74 01 00 00  00 00 00 00 00 00 00 00  |.tfdt...........|
    
00000310  00 00 00 00 20 74 72 75  6e 00 00 07 01 00 00 00  |.... trun.......|
    
00000320  01 00 00 00 70 00 00 ea  60 00 00 0e 99 02 80 00  |....p...`.......|
    
00000330  40 00 00 0e a1 6d 64 61  74 3c 3f 78 6d 6c 20 76  |@....mdat<?xml v|
    
00000340  65 72 73 69 6f 6e 3d 22  31 2e 30 22 20 65 6e 63  |ersion="1.0" enc|
    
00000350  6f 64 69 6e 67 3d 22 75  74 66 2d 38 22 3f 3e 3c  |oding="utf-8"?><|
    
00000360  74 74 20 78 6d 6c 6e 73  3d 22 68 74 74 70 3a 2f  |tt xmlns="http:/|
    
00000370  2f 77 77 77 2e 77 33 2e  6f 72 67 2f 6e 73 2f 74  |/www.w3.org/ns/t|
    
00000380  74 6d 6c 22 20 78 6d 6c  6e 73 3a 73 6d 70 74 65  |tml" xmlns:smpte|
    
00000390  3d 22 68 74 74 70 3a 2f  2f 77 77 77 2e 73 6d 70  |="http://www.smp|
    
000003a0  74 65 2d 72 61 2e 6f 72  67 2f 73 63 68 65 6d 61  |te-ra.org/schema|
    
000003b0  73 2f 32 30 35 32 2d 31  2f 32 30 31 30 2f 73 6d  |s/2052-1/2010/sm|

    I honestly have never seen anything like this before...

    So the command I’m running now is this :

    ffmpeg -y -i ’audionld#24000.mp4’ -i ’audionld#48000.mp4’ -i
    ’textnld.mp4’ -i ’video.mp4’ -map 0:a -map 1:a -map 2:d -map 3:v
    -metadata:s:a:0 language=nld -metadata:s:a:1 language=nld -acodec copy -bsf:a aac_adtstoasc -vcodec copy -c:d copy -movflags faststart "test.mp4" 2>&1

    Which results in this output :

    ffmpeg version 3.2.5-1~bpo8+1 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 4.9.2 (Debian 4.9.2-10)
    
  configuration: --prefix=/usr --extra-version='1~bpo8+1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --disable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'audionld#24000.mp4':
    
  Metadata:
    
    major_brand     : iso6
    
    minor_version   : 0
    
    compatible_brands: iso6dash
    
  Duration: 00:03:06.07, start: 0.000000, bitrate: 64 kb/s
    
    Stream #0:0(nld): Audio: aac (HE-AAC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 62 kb/s (default)
    
    Metadata:
    
      handler_name    : USP Sound Handler
    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'audionld#48000.mp4':
    
  Metadata:
    
    major_brand     : iso6
    
    minor_version   : 0
    
    compatible_brands: iso6dash
    
  Duration: 00:03:06.07, start: 0.000000, bitrate: 95 kb/s
    
    Stream #1:0(nld): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
    
    Metadata:
    
      handler_name    : USP Sound Handler
    
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'textnld.mp4':
    
  Metadata:
    
    major_brand     : iso6
    
    minor_version   : 0
    
    compatible_brands: iso6dash
    
  Duration: 00:03:05.76, bitrate: 0 kb/s
    
    Stream #2:0(nld): Data: none (stpp / 0x70707473), 0 kb/s (default)
    
    Metadata:
    
      handler_name    : USP Subtitle Handler
    
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
    
  Metadata:
    
    major_brand     : iso6
    
    minor_version   : 0
    
    compatible_brands: iso6dash
    
  Duration: 00:03:06.08, start: 0.000000, bitrate: 152 kb/s
    
    Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 416x234 [SAR 1:1 DAR 16:9], 144 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : USP Video Handler
    
      encoder         : Elemental H.264
    
[mp4 @ 0x7f15299c4520] Could not find tag for codec none in stream #2, codec not currently supported in container
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argumentStream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #1:0 -> #0:1 (copy)
    
  Stream #2:0 -> #0:2 (copy)
    
  Stream #3:0 -> #0:3 (copy)
    
    Last message repeated 1 times

    This gives the error :
    Could not find tag for codec none in stream #2, codec not currently supported in container
    Could not write header for output file #0 (incorrect codec parameters ?) : Invalid argument

    So I tried playing with the map like this :

    -map 2:s
    ==> Gives me :
    Stream map ’2:s’ matches no streams.
    To ignore this, add a trailing ’ ?’ to the map.

    -map 2:s ?
    ==> Gives me no error, but the subtitle stream isn’t added into the final file.

    Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #1:0 -> #0:1 (copy)
    
  Stream #3:0 -> #0:2 (copy)

    Maybe I first have to convert the subtitle into srt or such, but for that I don’t find on google what type of file this is.

    Any help would be greatly appreciated !

    Thanks

    ---EDIT---

    Hereby the code that I am using to convert this in PHP :

      private function convert_TTML_subtitle_file($orig) {
    
    if ( $orig == '' || !file_exists($orig) ) {
    
      return false;
    
    }
    

    
    $f = file_get_contents($orig);
    
    $pos = stripos($f, '<tt xmlns="http://www.w3.org/ns/ttml" if="if" false="false" return="return" while="while">body->div->p as $p ) {
    
          $txt .= "{$counter}\r\n";
    
          $counter++;
    
          $txt .= $p['begin'] . ' --> ' . $p['end'] . "\r\n";
    
          $txt .= $p->span . "\r\n\r\n";
    
        }
    
      }
    
      $cur += $curSize;
    
    }
    

    
    $fname = tempnam(getcwd(), 'sub');
    
    file_put_contents($fname, $txt);
    
    return $fname;
    
  }
    
</tt>

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