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• ffmpeg convert any file to any file

  28 mai 2015, par Vishnu

  I Want simple command to convert any supported file to any file with little possible video compression.

  for example

  avi to mp4
  
  mp4 to 3gp
  
  .
  
  .etc..

  I tried below code

  ffmpeg -i infile.flv outfile.3gp

  It works for some but for some other like flv to 3gp conversion it throws error like below and also output file size is very large than input.

  "Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height" 

  P:s i compiled with below librareis

  ./configure --enable-version3 --enable-libopencore-amrnb --enable-libvo-aacenc --enable-libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-gpl --enable-postproc --enable-nonfree

  full response

  array(48) {
  
    [0]=>
  
    string(77) "ffmpeg version N-72286-gd9b264b Copyright (c) 2000-2015 the FFmpeg developers"
  
    [1]=>
  
    string(56) "  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)"
  
    [2]=>
  
    string(261) "  configuration: --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-gpl --enable-postproc --enable-nonfree"
  
    [3]=>
  
    string(40) "  libavutil      54. 23.101 / 54. 23.101"
  
    [4]=>
  
    string(40) "  libavcodec     56. 39.101 / 56. 39.101"
  
    [5]=>
  
    string(40) "  libavformat    56. 33.101 / 56. 33.101"
  
    [6]=>
  
    string(40) "  libavdevice    56.  4.100 / 56.  4.100"
  
    [7]=>
  
    string(40) "  libavfilter     5. 16.101 /  5. 16.101"
  
    [8]=>
  
    string(40) "  libswscale      3.  1.101 /  3.  1.101"
  
    [9]=>
  
    string(40) "  libswresample   1.  1.100 /  1.  1.100"
  
    [10]=>
  
    string(40) "  libpostproc    53.  3.100 / 53.  3.100"
  
    [11]=>
  
    string(32) "Input #0, flv, from 'video.flv':"
  
    [12]=>
  
    string(11) "  Metadata:"
  
    [13]=>
  
    string(25) "    major_brand     : M4V"
  
    [14]=>
  
    string(23) "    minor_version   : 1"
  
    [15]=>
  
    string(39) "    compatible_brands: M4V M4A mp42isom"
  
    [16]=>
  
    string(26) "    date            : 2008"
  
    [17]=>
  
    string(71) "    copyright       : © 2008 Blender Foundation | www.bigbuckbunny.org"
  
    [18]=>
  
    string(36) "    title           : Big Buck Bunny"
  
    [19]=>
  
    string(43) "    artist          : Peach Open Movie Team"
  
    [20]=>
  
    string(56) "    composer        : Sacha Goedegebure / Ton Roosendaal"
  
    [21]=>
  
    string(35) "    encoder         : Lavf55.33.100"
  
    [22]=>
  
    string(59) "  Duration: 00:09:56.58, start: 0.058000, bitrate: 663 kb/s"
  
    [23]=>
  
    string(88) "    Stream #0:0: Video: h264 (High), yuv420p, 640x360, 24.42 fps, 24 tbr, 1k tbn, 48 tbc"
  
    [24]=>
  
    string(61) "    Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s"
  
    [25]=>
  
    string(90) "[h263 @ 0x1ef5f60] The specified picture size of 640x360 is not valid for the H.263 codec."
  
    [26]=>
  
    string(77) "Valid sizes are 128x96, 176x144, 352x288, 704x576, and 1408x1152. Try H.263+."
  
    [27]=>
  
    string(33) "Output #0, 3gp, to 'outfile.3gp':"
  
    [28]=>
  
    string(11) "  Metadata:"
  
    [29]=>
  
    string(25) "    major_brand     : M4V"
  
    [30]=>
  
    string(23) "    minor_version   : 1"
  
    [31]=>
  
    string(39) "    compatible_brands: M4V M4A mp42isom"
  
    [32]=>
  
    string(26) "    date            : 2008"
  
    [33]=>
  
    string(71) "    copyright       : © 2008 Blender Foundation | www.bigbuckbunny.org"
  
    [34]=>
  
    string(36) "    title           : Big Buck Bunny"
  
    [35]=>
  
    string(43) "    artist          : Peach Open Movie Team"
  
    [36]=>
  
    string(56) "    composer        : Sacha Goedegebure / Ton Roosendaal"
  
    [37]=>
  
    string(35) "    encoder         : Lavf55.33.100"
  
    [38]=>
  
    string(60) "    Stream #0:0: Video: h263, none, q=2-31, 128 kb/s, 24 fps"
  
    [39]=>
  
    string(13) "    Metadata:"
  
    [40]=>
  
    string(42) "      encoder         : Lavc56.39.101 h263"
  
    [41]=>
  
    string(52) "    Stream #0:1: Audio: amr_nb, 0 channels, 128 kb/s"
  
    [42]=>
  
    string(13) "    Metadata:"
  
    [43]=>
  
    string(55) "      encoder         : Lavc56.39.101 libopencore_amrnb"
  
    [44]=>
  
    string(15) "Stream mapping:"
  
    [45]=>
  
    string(54) "  Stream #0:0 -> #0:0 (h264 (native) -> h263 (native))"
  
    [46]=>
  
    string(66) "  Stream #0:1 -> #0:1 (mp3 (native) -> amr_nb (libopencore_amrnb))"
  
    [47]=>
  
    string(119) "Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height"
  
  }

• Evolution #2798 : Notification mise à jour SPIP

  9 avril 2015, par b b

  Et hop, voici le patch à jour avec la proposition de Cedric.

  Reste à améliorer le lien. Je pense qu’on pourrait mettre en place sur spip.net une page dont le fonctionnement serait similaire à celle des téléchargements avec une url comme http://www.spip.net/fr_update

  Pour cela, il faut créer un article en fr (pour commencer) qui reprend les propositions de Nicolas par ici :

  http://www.spip.net/ecrire/?exec=rubrique&id_rubrique=151

  Puis modifier le squelette pour qu’il prenne en charge l’url /xx_update par ici :

  http://zone.spip.org/trac/spip-zone/browser/_galaxie_/www.spip.net/squelettes/branches/2008/urls/trad.php#L8

  Ça vous semble convenable ? gogogo ?

• Best and latest live video streaming soloution [on hold]

  3 avril 2015, par Ford

  I have read a few old posts on StackOverflow about live video streamins, but as they are from around 2008, i assume things have moved on from then... and wonder if a current thread will be useful to me and others.
  Also looking on google gives lots of stuff, but again i dont know who is best to listen to and who is trying to sell their stuff (not that i am against paying).

  Basically what are the main points i need to know in order to add/develope a feature to a website in order to offer "1 on 1" and "1 to many" MULTIPLE live streaming webcam, with voice and text chat.

  I am quiet competent with PHP, OK with basic JavaScript (of course fine with HTMLL/css), but do not know what code i would need for client side software, or if any "off the shelf" software is suitable.
  I have played with ffmpeg and noticed this offers streaming, but i dont know if it would be suitable or the best available option.?
  I have a dedicated server with virtualization so can add a dedicated box for streaming if needed/better.

  Any info that can point me off in the right direction of how to add a live streaming service to a website would be much appreciated !