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• Conversion for WebM file format using FFMPEG

  23 mars 2012, par user974435

  I am using followng command to convert video to webm format

  ffmpeg -i video/ds2.mp4 -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b:a 345k -s 640x360 video/ds2.webm

  I am receiving following errors :

  1) incompatible sample format 's16' for codec 'libvorbis'

  2) strptime() unavailable on this system, cannot convert the data string

  Do you any idea why I cannot convert, tested conversion to FLV and it's working very well

  Console output

  C:\inetpub\wwwroot>ffmpeg -i video/testavi.avi video/ds2.webm
  
  ffmpeg version N-35709-g7d531e8, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Dec 12 2011 13:56:52 with gcc 4.6.2
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
  
  ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
  
  able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
  
  -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
  
  c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
  
  libxvid --enable-zlib
  
    libavutil    51. 32. 0 / 51. 32. 0
  
    libavcodec   53. 43. 0 / 53. 43. 0
  
    libavformat  53. 24. 0 / 53. 24. 0
  
    libavdevice  53.  4. 0 / 53.  4. 0
  
    libavfilter   2. 53. 0 /  2. 53. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  Input #0, avi, from 'video/testavi.avi':
  
    Metadata:
  
      encoder         : Lavf51.12.1
  
    Duration: 00:00:13.03, start: 0.000000, bitrate: 36427 kb/s
  
      Stream #0:0: Video: msmpeg4 (MP43 / 0x3334504D), yuv420p, 1920x1080, 30 tbr,
  
   30 tbn, 30 tbc
  
      Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16, 192 kb
  
  /s
  
  File 'video/ds2.webm' already exists. Overwrite ? [y/N] y
  
  w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
  
  [libvpx @ 0000000001CA9BB0] v0.9.7-p1
  
  Output #0, webm, to 'video/ds2.webm':
  
    Metadata:
  
      encoder         : Lavf53.24.0
  
      Stream #0:0: Video: vp8, yuv420p, 1920x1080, q=-1--1, 200 kb/s, 1k tbn, 30 t
  
  bc
  
      Stream #0:1: Audio: vorbis, 44100 Hz, stereo, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (msmpeg4 -> libvpx)
  
    Stream #0:1 -> #0:1 (mp3 -> libvorbis)
  
  Press [q] to stop, [?] for help

  ---

  Problem signature:
  
    Problem Event Name:   APPCRASH
  
    Application Name: ffmpeg.exe
  
    Application Version:  0.0.0.0
  
    Application Timestamp:    4ee64f02
  
    Fault Module Name:    ffmpeg.exe
  
    Fault Module Version: 0.0.0.0
  
    Fault Module Timestamp:   4ee64f02
  
    Exception Code:   c0000005
  
    Exception Offset: 000000000091e090
  
    OS Version:   6.1.7601.2.1.0.272.7
  
    Locale ID:    1033
  
    Additional Information 1: ab8f
  
    Additional Information 2: ab8f35a907f8f11a8d2e787a8e40efbd
  
    Additional Information 3: f4d5
  
    Additional Information 4: f4d524f8bf76a4b71cc6a7afa6412ca9
  
  
  
  Read our privacy statement online:
  
    http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
  
  
  
  If the online privacy statement is not available, please read our privacy statement offline:
  
    C:\Windows\system32\en-US\erofflps.txt

  And Console Uncut Output

  C:\inetpub\wwwroot>ffmpeg.exe -i "video/testavi.avi" -acodec libvorbis -b:a 96k
  
  -ac 2 -vcodec libvpx -b:v 400k -f webm -s 384x216 "video/testavi.webm"
  
  ffmpeg version N-35709-g7d531e8, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Dec 12 2011 13:56:52 with gcc 4.6.2
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
  
  ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
  
  able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
  
  -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
  
  c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
  
  libxvid --enable-zlib
  
    libavutil    51. 32. 0 / 51. 32. 0
  
    libavcodec   53. 43. 0 / 53. 43. 0
  
    libavformat  53. 24. 0 / 53. 24. 0
  
    libavdevice  53.  4. 0 / 53.  4. 0
  
    libavfilter   2. 53. 0 /  2. 53. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  Input #0, avi, from 'video/testavi.avi':
  
    Metadata:
  
      encoder         : Lavf51.12.1
  
    Duration: 00:00:13.03, start: 0.000000, bitrate: 36427 kb/s
  
      Stream #0:0: Video: msmpeg4 (MP43 / 0x3334504D), yuv420p, 1920x1080, 30 tbr,
  
   30 tbn, 30 tbc
  
      Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16, 192 kb
  
  /s
  
  [buffer @ 0000000001D7FF60] w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:0/1 sw
  
  s_param:
  
  [scale @ 0000000001D7E9E0] w:1920 h:1080 fmt:yuv420p -> w:384 h:216 fmt:yuv420p
  
  flags:0x4
  
  [libvpx @ 0000000001BF7C10] v0.9.7-p1
  
  Output #0, webm, to 'video/testavi.webm':
  
    Metadata:
  
      encoder         : Lavf53.24.0
  
      Stream #0:0: Video: vp8, yuv420p, 384x216, q=-1--1, 400 kb/s, 1k tbn, 30 tbc
  
  
  
      Stream #0:1: Audio: vorbis, 44100 Hz, 2 channels, s16, 96 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (msmpeg4 -> libvpx)
  
    Stream #0:1 -> #0:1 (mp3 -> libvorbis)
  
  Press [q] to stop, [?] for help

• AForge.Video.FFMPEG used in C#

  17 janvier 2017, par cuong nguyen

  I use Visual C# 2008 and want to write AVI file from bmp sequences.

  I found AForge.Video.VWF but it’s just for "vmw3" or "DIB " codecs and I want to use AForge.Video.FFMPEG but it got error.

  For example I just code :

  using System;
  
  using System.Collections.Generic;
  
  
  
  using System.Linq;
  
  using System.Text;
  
  using AForge.Video.FFMPEG;
  
  
  
  namespace ConsoleApplication4
  
  {
  
      class Program
  
      {
  
          static void Main(string[] args)
  
          {
  
              VideoFileWriter vfw = new VideoFileWriter();
  
          }
  
      }
  
  }

  But I got this filenotfoundexception

  {"The specified module could not be found. (Exception from HRESULT: 0x8007007E)":null}

• FFMPEG - Converting any kind of file to Mp4 compatible with IOS and Flash

  5 février 2013, par arashaga

  I am struggling with FFmpeg whithing Drupal Video Module to produce files to MP4 that is compatible with IOS and Flash Player10 and up.
  I have used the following commands so far, please note that the variables starting with " !" are placeholders and will be replaces with the proper items :

  FFmpeg -strict experimental -y -i !videofile -pass 1 -s !widthx!height -b:v 500k -threads 0 -vcodec libx264 -vf "pad=!paddingwidth:!paddingheight:!paddingleft:!paddingtop:000000" -preset slow -an !convertfile
  
  
  
  FFmpeg -strict experimental -y -i !videofile -pass 2 -s !widthx!height -b:v 500k -threads 0 -vcodec libx264 -vf "pad=!paddingwidth:!paddingheight:!paddingleft:!paddingtop:000000" -preset slow -acodec aac -ab 128k !convertfile

  The above command produce an error as :

  error executing command for rendering preset HTML5 MP4, command #1 :

  nice -n 19 /usr/bin/ffmpeg/ffmpeg -y -i '80137db8c3_1334836277_int_tr_19.mp4' -s 176x100 -b:v 500k -threads 0 -vcodec libx264 -preset slow -acodec aac -ab 128k '/converted/80137db8c3_1334836277_int_tr_19.mp4' 2>&1
  
  
  
  Output:
  
  
  
  ffmpeg version git-2013-02-01-5a67e30 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Feb  1 2013 14:23:14 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
  
    libavutil      52. 17.100 / 52. 17.100
  
    libavcodec     54. 91.100 / 54. 91.100
  
    libavformat    54. 61.104 / 54. 61.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 35.100 /  3. 35.100
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '80137db8c3_1334836277_int_tr_19.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2011-03-28 00:12:26
  
    Duration: 00:02:01.14, start: 0.000000, bitrate: 703 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 601 kb/s, 29.96 fps, 29.92 tbr, 1k tbn, 59.83 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 96 kb/s
  
      Metadata:
  
        creation_time   : 2011-03-28 00:12:27
  
        handler_name    : (C) 2007 Google Inc. v08.13.2007.
  
  [libx264 @ 0x34ec060] using SAR=100/99
  
  [libx264 @ 0x34ec060] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x34ec060] profile High, level 2.0
  
  [libx264 @ 0x34ec060] 264 - core 129 r2245 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=abr mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.
  
  Alternatively use the non experimental encoder 'libfaac'.

  Another command that I used is :

  FFmpeg -i !videofile -an -pass 1 -vcodec libx264 -preset slow -b 500k -threads auto !convertfile
  
  
  
  FFMpeg -y -i !videofile -acodec libfaac -ab 128k -pass 2 -vcodec libx264 -preset slow -b 500k -threads auto !convertfile

  Output for the first pass :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'comiccon.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      creation_time   : 2012-08-15 17:12:37
  
    Duration: 01:17:15.93, start: 0.000000, bitrate: 706 kb/s
  
      Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 636 kb/s, 30 fps, 30 tbr, 90k tbn, 60 tbc
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 63 kb/s
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : SoundHandler
  
  Please use -b:a or -b:v, -b is ambiguous
  
  
  
  using SAR=1/1
  
  [libx264 @ 0x1c39be0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x1c39be0] profile Main, level 3.0
  
  [libx264 @ 0x1c39be0] 264 - core 129 r2245 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x1:0 me=dia subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 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=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=abr mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'comiccon.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      encoder         : Lavf54.61.104
  
      Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, pass 1, 500 kb/s, 15360 tbn, 30 tbc
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : VideoHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=139078 fps=279 q=32766.0 Lsize=  286145kB time=01:17:15.86 bitrate= 505.6kbits/s    
  
  video:284758kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.487000%
  
  [libx264 @ 0x1c39be0] frame I:656   Avg QP:19.51  size: 21457
  
  [libx264 @ 0x1c39be0] frame P:76006 Avg QP:22.19  size:  3141
  
  [libx264 @ 0x1c39be0] frame B:62416 Avg QP:26.38  size:   621
  
  [libx264 @ 0x1c39be0] consecutive B-frames: 32.3% 17.5% 18.6% 31.6%
  
  [libx264 @ 0x1c39be0] mb I  I16..4: 24.5%  0.0% 75.5%
  
  [libx264 @ 0x1c39be0] mb P  I16..4:  7.5%  0.0%  0.0%  P16..4: 40.5%  0.0%  0.0%  0.0%  0.0%    skip:52.1%
  
  [libx264 @ 0x1c39be0] mb B  I16..4:  1.4%  0.0%  0.0%  B16..8: 12.0%  0.0%  0.0%  direct: 2.9%  skip:83.7%  L0:41.1% L1:41.6% BI:17.3%
  
  [libx264 @ 0x1c39be0] final ratefactor: 23.45
  
  [libx264 @ 0x1c39be0] direct mvs  spatial:95.3% temporal:4.7%
  
  [libx264 @ 0x1c39be0] coded y,uvDC,uvAC intra: 37.6% 42.8% 11.8% inter: 8.9% 8.2% 0.5%
  
  [libx264 @ 0x1c39be0] i16 v,h,dc,p: 43% 28% 19% 10%
  
  [libx264 @ 0x1c39be0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 21% 11%  6%  4%  5%  4%  6%  6%
  
  [libx264 @ 0x1c39be0] i8c dc,h,v,p: 57% 19% 20%  4%
  
  [libx264 @ 0x1c39be0] Weighted P-Frames: Y:1.4% UV:0.5%
  
  [libx264 @ 0x1c39be0] kb/s:503.18

  output for the second pass :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'comiccon.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      creation_time   : 2012-08-15 17:12:37
  
    Duration: 01:17:15.93, start: 0.000000, bitrate: 706 kb/s
  
      Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 636 kb/s, 30 fps, 30 tbr, 90k tbn, 60 tbc
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 63 kb/s
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : SoundHandler
  
  Please use -b:a or -b:v, -b is ambiguous
  
  [libx264 @ 0x3247f80] using SAR=1/1
  
  [libx264 @ 0x3247f80] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x3247f80] profile High, level 3.0
  
  [libx264 @ 0x3247f80] 264 - core 129 r2245 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=2pass mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 cplxblur=20.0 qblur=0.5 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'comiccon.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: mp41
  
      encoder         : Lavf54.61.104
  
      Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, pass 2, 500 kb/s, 15360 tbn, 30 tbc
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s
  
      Metadata:
  
        creation_time   : 2012-08-15 17:12:37
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (aac -> libfaac)
  
  Press [q] to stop, [?] for help
  
  frame=139078 fps=206 q=32766.0 Lsize=  357252kB time=01:17:15.93 bitrate= 631.3kbits/s    
  
  video:282992kB audio:69592kB subtitle:0 global headers:0kB muxing overhead 1.324238%
  
  [libx264 @ 0x3247f80] frame I:656   Avg QP:19.61  size: 20433
  
  [libx264 @ 0x3247f80] frame P:76006 Avg QP:23.07  size:  2996
  
  [libx264 @ 0x3247f80] frame B:62416 Avg QP:26.23  size:   780
  
  [libx264 @ 0x3247f80] consecutive B-frames: 32.3% 17.5% 18.6% 31.6%
  
  [libx264 @ 0x3247f80] mb I  I16..4: 17.2% 37.8% 44.9%
  
  [libx264 @ 0x3247f80] mb P  I16..4:  2.9%  3.7%  1.2%  P16..4: 30.3%  6.1%  3.4%  0.0%  0.0%    skip:52.5%
  
  [libx264 @ 0x3247f80] mb B  I16..4:  0.5%  0.6%  0.3%  B16..8: 25.9%  2.2%  0.5%  direct: 0.9%  skip:69.3%  L0:51.4% L1:43.0% BI: 5.7%
  
  [libx264 @ 0x3247f80] 8x8 transform intra:45.9% inter:51.5%
  
  [libx264 @ 0x3247f80] direct mvs  spatial:85.5% temporal:14.5%
  
  [libx264 @ 0x3247f80] coded y,uvDC,uvAC intra: 47.3% 49.2% 13.5% inter: 9.0% 9.4% 0.5%
  
  [libx264 @ 0x3247f80] i16 v,h,dc,p: 38% 27% 13% 22%
  
  [libx264 @ 0x3247f80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 16% 14%  5%  5%  7%  7%  8%  9%
  
  [libx264 @ 0x3247f80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 15%  9%  6%  7%  8%  7%  8%  8%
  
  [libx264 @ 0x3247f80] i8c dc,h,v,p: 49% 22% 20%  8%
  
  [libx264 @ 0x3247f80] Weighted P-Frames: Y:1.4% UV:0.5%
  
  [libx264 @ 0x3247f80] ref P L0: 79.3% 10.4%  6.8%  1.6%  1.2%  0.7%  0.0%
  
  [libx264 @ 0x3247f80] ref B L0: 93.6%  4.8%  1.2%  0.3%
  
  [libx264 @ 0x3247f80] ref B L1: 96.6%  3.4%
  
  [libx264 @ 0x3247f80] kb/s:500.06

  The above command produces the file correctly however it cannot be played in flash player. One thing that I noticed is this may happen if the input file is mp4 as well. This command is executed for users uploading files, so the input file could be any format.

  Below is the information about my FFmpeg version :

  ffmpeg version git-2013-02-01-5a67e30 Copyright (c) 2000-2013 the
  FFmpeg developers built on Feb 1 2013 14:23:14 with gcc 4.6
  (Ubuntu/Linaro 4.6.3-1ubuntu5) configuration : —enable-gpl
  —enable-libass —enable-libfaac —enable-libfdk-aac —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-librtmp —enable-libtheora —enable-libvorbis —enable-libvpx —enable-libx264 —enable-nonfree —enable-version3 libavutil 52. 17.100 / 52. 17.100
  libavcodec 54. 91.100 / 54. 91.100
  libavformat 54. 61.104 / 54. 61.104
  libavdevice 54. 3.103 / 54. 3.103
  libavfilter 3. 35.100 / 3. 35.100
  libswscale 2. 2.100 / 2. 2.100
  libswresample 0. 17.102 / 0. 17.102
  libpostproc 52. 2.100 / 52. 2.1

  Thanks,