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• Using FFMPEG to reliably convert videos to mp4 for iphone/ipod and flash players

  23 avril 2016, par Jake Stevenson

  I need to convert videos for use in both a flash player and the iphone/ipod touch. I’m using the following batch script with ffmpeg :

  @echo off
  
  ffmpeg.exe -i %1 -s qvga -acodec libfaac -ar 22050 -ab 128k -vcodec libx264 -threads 0 -f ipod %2

  This always outputs an mp4 file, and I can always play it on my PC. The videos also seem to play fine on my iphone 3GS. But with some input files it won’t work for older iphone versions (3G and iPod touch).

  Here’s the ffmpeg output from one such file :

  D:\ffmpeg>encode.bat d:\temp\recording.flv d:\temp\out.m4v
  
  FFmpeg version SVN-r18709, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  
    configuration: --enable-memalign-hack --prefix=/mingw --cross-prefix=i686-ming
  
  w32- --cc=ccache-i686-mingw32-gcc --target-os=mingw32 --arch=i686 --cpu=i686 --e
  
  nable-avisynth --enable-gpl --enable-zlib --enable-bzlib --enable-libgsm --enabl
  
  e-libfaac --enable-libfaad --enable-pthreads --enable-libvorbis --enable-libtheo
  
  ra --enable-libspeex --enable-libmp3lame --enable-libopenjpeg --enable-libxvid -
  
  -enable-libschroedinger --enable-libx264
  
    libavutil     50. 3. 0 / 50. 3. 0
  
    libavcodec    52.27. 0 / 52.27. 0
  
    libavformat   52.32. 0 / 52.32. 0
  
    libavdevice   52. 2. 0 / 52. 2. 0
  
    libswscale     0. 7. 1 /  0. 7. 1
  
    built on Apr 28 2009 04:04:42, gcc: 4.2.4
  
  [flv @ 0x187d650]skipping flv packet: type 18, size 164, flags 0
  
  Input #0, flv, from 'd:\temp\recording.flv':
  
    Duration: 00:00:07.17, start: 0.001000, bitrate: N/A
  
      Stream #0.0: Video: flv, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
  
      Stream #0.1: Audio: nellymoser, 44100 Hz, mono, s16
  
  [libx264 @ 0x13518b0]using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE
  
  4.2
  
  [libx264 @ 0x13518b0]profile Baseline, level 4.2
  
  Output #0, ipod, to 'd:\temp\out.m4v':
  
      Stream #0.0: Video: libx264, yuv420p, 320x240, q=2-31, 200 kb/s, 1k tbn, 1k
  
  tbc
  
      Stream #0.1: Audio: libfaac, 22050 Hz, mono, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Press [q] to stop encoding
  
  frame=   90 fps=  0 q=-1.0 Lsize=     128kB time=6.87 bitrate= 152.4kbits/s
  
  video:92kB audio:32kB global headers:1kB muxing overhead 2.620892%
  
  [libx264 @ 0x13518b0]slice I:8     Avg QP:29.62  size:  7047
  
  [libx264 @ 0x13518b0]slice P:82    Avg QP:30.83  size:   467
  
  [libx264 @ 0x13518b0]mb I  I16..4: 17.9%  0.0% 82.1%
  
  [libx264 @ 0x13518b0]mb P  I16..4:  0.6%  0.0%  0.0%  P16..4: 23.1%  0.0%  0.0%
  
   0.0%  0.0%    skip:76.3%
  
  [libx264 @ 0x13518b0]final ratefactor: 57.50
  
  [libx264 @ 0x13518b0]SSIM Mean Y:0.9544735
  
  [libx264 @ 0x13518b0]kb/s:8412.6

  My suspicion is that it has something to do with the audio encoding. If so, does anyone know how to force it to reencode the audio to the proper format ?

  Any other ideas ?

• How to convert .flv file to .3gp using ffmpeg ? [migrated]

  19 octobre 2011, par Chetana

  I have converted any video format to 3gp file format using ffmpeg on one server.
  But on another server it not works.

  Following is my script :

  exec("ffmpeg -i test.flv -sameq -acodec libmp3lame -ar 22050 -ab 96000
  
      -deinterlace -nr 500 -s 320x240 -aspect 4:3 -r 20 -g 500 -me_range 20
  
      -b 270k -deinterlace -f flv -y test.3gp ");

  Can anyone tell me what is wrong in script ?

  Following is my ffmpeg setting :

  root@ninja [ ]# ffmpeg -formats
  ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard
  configuration : —enable-mp3lame —enable-libogg —enable-gpl —disable-mmx
  —enable-shared
  built on Jun 17 2009 10:51:43, gcc : 4.1.2 20080704 (Red Hat 4.1.2-44)

• FFMPEG - Not finding codec parameters

  26 février 2016, par Tanner Smith

  I’m trying to convert a sequence of images into a mpeg movie via FFMPEG, although I keep getting an error saying that it could not find the code parameters (Video : mjpeg). A Google search did not bring much up that was useful.

  ffmpeg -f image2 -i /tmp/img%03d.jpg video.mpgFFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
    configuration : —extra-version=4:0.5.1-1ubuntu1 —prefix=/usr —enable-avfilter —enable-avfilter-lavf —enable-vdpau —enable-bzlib —enable-libgsm —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-libvorbis —enable-pthreads —enable-zlib —disable-stripping —disable-vhook —enable-runtime-cpudetect —enable-gpl —enable-postproc —enable-swscale —enable-x11grab —enable-libdc1394 —enable-shared —disable-static
    libavutil     49.15. 0 / 49.15. 0
    libavcodec    52.20. 1 / 52.20. 1
    libavformat   52.31. 0 / 52.31. 0
    libavdevice   52. 1. 0 / 52. 1. 0
    libavfilter    0. 4. 0 /  0. 4. 0
    libswscale     0. 7. 1 /  0. 7. 1
    libpostproc   51. 2. 0 / 51. 2. 0
    built on Mar  4 2010 12:35:30, gcc : 4.4.3
  [mjpeg @ 0x9069870]dqt : 16bit precision
  [mjpeg @ 0x9069870]mjpeg : unsupported coding type (c9)
  [mjpeg @ 0x9069870]mjpeg : unsupported coding type (cf)
  [mjpeg @ 0x9069870]only 8 bits/component accepted
  [mjpeg @ 0x9069870]dqt : 16bit precision
  [mjpeg @ 0x9069870]huffman table decode error
  [mjpeg @ 0x9069870]mjpeg : unsupported coding type (ca)
  [mjpeg @ 0x9069870]mjpeg : unsupported coding type (ce)
  [mjpeg @ 0x9069870]mjpeg : unsupported coding type (cb)
  [mjpeg @ 0x9069870]decode_sos : invalid len (60581)
  [mjpeg @ 0x9069870]only 8 bits/component accepted
  [mjpeg @ 0x9069870]decode_sos : invalid len (56833)
  [mjpeg @ 0x9069870]invalid id 207
  [mjpeg @ 0x9069870]mjpeg : unsupported coding type (cd)
  [mjpeg @ 0x9069870]huffman table decode error
  [image2 @ 0x90682c0]Could not find codec parameters (Video : mjpeg)
  /tmp/img%03d.jpg : could not find codec parameters
  

  The images reside in the /tmp directory with names such as img001.jpg and img002.jpg.

  Any ideas ?

  Thanks
   Tanner