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• Mozilla Firefox 36 has problems playing my h264 MP4 files

  11 juin 2015, par Wolfgang Pürstner

  I try to convert videos with ffmpeg to mp4 format (h264) Profile : High Level : 3.1 (1280x720 with 30fps), Bitrate 1500k

  The video plays very well in every browser except in Firefox.

  http://5.79.72.89/trailer/trailer.mp4

  At first it needs longer to load and when I seek inside the video most times the video don’t stop to load and never plays again.
  I can see a lot of partial downloads in the developer console. A lot of them are for the initial play and the rest of the requests are during the video load when I seek to a later position.

  

  When I play other h264 Videos (MP4 with similar settings) they play without problems on this server.
  And when I put my video on another webserver (apache) there are the same problems with Firefox.

  For this reason I believe it has to do something with me my conversion.

  My settings :
  Debian 7 (wheezy)
  Webserver : nginx (with 260k bandwidth limit)

  I started converting videos with avconv and switched to ffmpeg because of this problems. But there was no success.
  Meanwhile I tried all options for encoding but there are always the same problems with Firefox. Other videos play well but not mines and I don’t know why.

  Command :

  ffmpeg -i input.mp4 -tune zerolatency -x264opts bitrate=1500:vbv-maxrate=1500:vbv-bufsize=3000:nal-hrd=vbr -codec:v libx264 -profile:v high -level 3.1 -movflags +faststart -pix_fmt yuv420p  -s 1280x720 -r 30 -ac 2 -ar 48000 -codec:a aac -ab 64k -strict experimental -y trailer.mp4
  

  ffmpeg 1.0.10
  libavutil      51. 73.101 / 51. 73.101
  libavcodec     54. 59.100 / 54. 59.100
  libavformat    54. 29.104 / 54. 29.104
  libavdevice    54.  2.101 / 54.  2.101
  libavfilter     3. 17.100 /  3. 17.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
  

  Mediainfo of the file : trailer.mp4

  General
  Complete name : trailer.mp4
  Format : MPEG-4
  Format profile : Base Media
  Codec ID : isom
  File size : 115 MiB
  Duration : 10mn 34s
  Overall bit rate : 1 516 Kbps
  Movie name : Big Buck Bunny, Sunflower version
  Performer : Blender Foundation 2008, Janus Bager Kristensen 2013
  Composer : Sacha Goedegebure
  Genre : Animation
  Writing application : Lavf54.29.104
  Comment : Creative Commons Attribution 3.0 - http://bbb3d.renderfarming.net
  Video
  
  ID : 1
  
  Format : AVC
  
  Format/Info : Advanced Video Codec
  
  Format profile : High@L3.1
  
  Format settings, CABAC : Yes
  
  Format settings, ReFrames : 4 frames
  
  Codec ID : avc1
  
  Codec ID/Info : Advanced Video Coding
  
  Duration : 10mn 34s
  
  Bit rate : 1 500 Kbps
  
  Width : 1 920 pixels
  
  Height : 1 080 pixels
  
  Display aspect ratio : 16:9
  
  Frame rate mode : Constant
  
  Frame rate : 30.000 fps
  
  Color space : YUV
  
  Chroma subsampling : 4:2:0
  
  Bit depth : 8 bits
  
  Scan type : Progressive
  
  Bits/(Pixel*Frame) : 0.024
  
  Stream size : 109 MiB (95%)
  
  Writing library : x264 core 132
  
  Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=50 / keyint_min=5 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=cbr / mbtree=1 / bitrate=1500 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=1500 / vbv_bufsize=3000 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
  Audio
  
  ID : 2
  
  Format : AAC
  
  Format/Info : Advanced Audio Codec
  
  Format profile : LC
  
  Codec ID : 40
  
  Duration : 10mn 34s
  
  Duration_LastFrame : -11ms
  
  Bit rate mode : Constant
  
  Bit rate : 64.2 Kbps
  
  Channel(s) : 2 channels
  
  Channel positions : Front : L R
  
  Sampling rate : 48.0 KHz
  
  Compression mode : Lossy
  
  Delay relative to video : -2ms
  
  Stream size : 4.85 MiB (4%)
  

  I don’t know what is wrong with my files.

  Update 2015-03-12 :

  If I convert the video without audio stream there is no problem with firefox anymore.

  I updated ffmpeg to 2.6. I used libfaac, aac and libfdk_aac for audio encoding with cbr and vbr but without success.

• 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 ?

• 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"
  
  }