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• How do I convert videos to mp4 for use on Android ? [on hold]

  11 avril 2014, par user3525211

  I am trying to use ffmpeg to convert videos (flv,mov,etc) to mp4 for use on android mobile phones. The conversion seemingly works fine. I can see the mp4s on my iphone. But when I test it out on android phones it does not work. I have been googling this problem for two weeks now and I have tried probably 50 different variations of ffmpeg command lines, but without success. I tried upgrading to the latest ffmpeg on my linux server, but I am not linux savvy and am not sure that it did what it was supposed to. I am at my wits end. Am I going about this wrong ? Is ffmpeg the right tool ? Any ideas ?

  Here is the command line I have used to successfully convert to mp4s that work on iphone :
  ffmpeg -y -i input.mov -s 480x270 -r 30000/1001 -b 128k -vcodec libx264 -vpre slow -vpre ipod320 -acodec libfaac -ac 2 -ar 44100 -ab 128k output.mp4

• FFMpeg video recorder - Android

  30 avril 2014, par Ganesh

  I’ve used ffmpeg video recorder for android.

  it has used videocodec as MPEG4.

  private int videoCodec = avcodec.AV_CODEC_ID_MPEG4;

  video is showing android and iphone device. but video not playing on browser only audio playing on browser.

  I’ve checked HTML5 video requires MP4 videos with H264 video codec and AAC audio codec

  Chrome doesn’t display html5 video but plays audio

  I’ve changed videocodec as below

  private int videoCodec = avcodec.AV_CODEC_ID_H264;

  My question is,

  when i use Mpeg4, video croping time is less.
  But when i use H264 , video croping time takes more.

  How to reduce the video croping time when use H264 or anyother videocode support to browser and minimum processing time for video croping.?

• Ffmpeg - Remove rotate metadata

  16 mai 2014, par Ron I

  When I extract the images from a video, the resulting images are getting rotated. The orientation of the video is correct, and the images are upside down. The metadata for the original video is 180, and also for the output file, so it looks like it is copying that data and additionally rotating 180 degrees. However, since the original video is already rotated, it is flipping the video upside down.

  I would like to remove the metadata for the output file containing the ’rotate’ command. I tried adding -vf rotate=0, but it didn’t work.

  Here is the command I am running :

  ffmpeg -i left.MOV -r 1 -f image2 left-03%d.png

  I assume this is what is throwing it off (it looks like it is copying the rotate metadata from the input file and applying it to the output file) :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'left.MOV':
  
  rotate          : 180
  
  
  
  Output #0, image2, to 'left-03%d.png':
  
  
  
  Metadata:
  
        rotate          : 180

  Here’s the full output :

      ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Apr 11 2014 22:50:35 with Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  
    libavutil      52. 66.100 / 52. 66.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  2.100 /  4.  2.100
  
    libavresample   1.  2.  0 /  1.  2.  0
  
    libswscale      2.  5.102 /  2.  5.102
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'left.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2014-05-14 16:24:27
  
      make            : Apple
  
      make-eng        : Apple
  
      encoder         : 7.1.1
  
      encoder-eng     : 7.1.1
  
      date            : 2014-05-14T09:23:48-0700
  
      date-eng        : 2014-05-14T09:23:48-0700
  
      model           : iPhone 5
  
      model-eng       : iPhone 5
  
    Duration: 00:00:10.98, start: 0.000000, bitrate: 795 kb/s
  
      Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 62 kb/s (default)
  
      Metadata:
  
        creation_time   : 2014-05-14 16:24:27
  
        handler_name    : Core Media Data Handler
  
      Stream #0:1(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 568x320, 728 kb/s, 29.97 fps, 29.97 tbr, 600 tbn, 1200 tbc (default)
  
      Metadata:
  
        rotate          : 180
  
        creation_time   : 2014-05-14 16:24:27
  
        handler_name    : Core Media Data Handler
  
  Output #0, image2, to 'left-03%d.png':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      model-eng       : iPhone 5
  
      make            : Apple
  
      make-eng        : Apple
  
      model           : iPhone 5
  
      encoder-eng     : 7.1.1
  
      date            : 2014-05-14T09:23:48-0700
  
      date-eng        : 2014-05-14T09:23:48-0700
  
      encoder         : Lavf55.33.100
  
      Stream #0:0(und): Video: png, rgb24, 568x320, q=2-31, 200 kb/s, 90k tbn, 1 tbc (default)
  
      Metadata:
  
        rotate          : 180
  
        creation_time   : 2014-05-14 16:24:27
  
        handler_name    : Core Media Data Handler
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (h264 -> png)
  
  Press [q] to stop, [?] for help
  
  frame=   14 fps=0.0 q=0.0 Lsize=N/A time=00:00:14.00 bitrate=N/A dup=0 drop=315    
  
  video:1521kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -100.001411%