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  • Encoding a readable movie by QuickTime using FFMPEG

    29 juillet 2018, par itamarb

    I’m trying to encode an image sequence using the following command :

    ffmpeg.exe -i %d.png -f mp4 -vcodec h264 test.mp4

    However, QuickTime failed to open this file or sometimes play a black movie, while this movie plays great in VLC player. Any suggestions how to make it play well in QuickTime ?

    Here is the output :

    ffmpeg.exe -i %d.png -f mp4 -vcodec libx264 13.mp4
    
ffmpeg version N-49044-g89afa63 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Jan 19 2013 20:36:06 with gcc 4.7.2 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libg
    
sm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --e
    
nable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --e
    
nable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --en
    
able-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable
    
-libxavs --enable-libxvid --enable-zlib --enable-filter=frei0r
    
  libavutil      52. 15.100 / 52. 15.100
    
  libavcodec     54. 89.100 / 54. 89.100
    
  libavformat    54. 61.101 / 54. 61.101
    
  libavdevice    54.  3.102 / 54.  3.102
    
  libavfilter     3. 32.101 /  3. 32.101
    
  libswscale      2.  2.100 /  2.  2.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  2.100 / 52.  2.100
    
[image2 @ 0221b940] max_analyze_duration 5000000 reached at 5000000 microseconds
    

    
Input #0, image2, from '%d.png':
    
  Duration: 00:01:19.36, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: png, rgb24, 639x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
    
[libx264 @ 0221edc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE
    
4.2 AVX
    
[libx264 @ 0221edc0] profile High 4:4:4 Predictive, level 3.0, 4:4:4 8-bit
    
[libx264 @ 0221edc0] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Cop
    
yleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
    
lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
    
e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
    
ma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 in
    
terlaced=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=250 keyint_min=25 scenecu
    
t=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0
    
 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to '13.mp4':
    
  Metadata:
    
    encoder         : Lavf54.61.101
    
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 639x480, q=-1--1
    
, 12800 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png -> libx264)
    
Press [q] to stop, [?] for help
    
frame=   76 fps=0.0 q=28.0 size=       3kB time=00:00:00.96 bitrate=  22.3kbits/
    
frame=  156 fps=155 q=28.0 size=       7kB time=00:00:04.16 bitrate=  14.7kbits/
    
frame=  219 fps=145 q=28.0 size=      12kB time=00:00:06.68 bitrate=  14.1kbits/
    
frame=  283 fps=141 q=28.0 size=      16kB time=00:00:09.24 bitrate=  14.2kbits/
    
frame=  352 fps=140 q=28.0 size=      25kB time=00:00:12.00 bitrate=  17.4kbits/

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

    14 février 2021, par jax

    I am struggling with FFmpeg within 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

    


  • 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,

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