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• Video processing with ffmpeg on Windows Azure

  29 août 2014, par alekz

  I am working on the project that needs to process videos that are already stored at the AzureBlob storage.

  The processing itself lookes following

  1. Grab frame with ffMpegFrameGrabber
  2. Draw some elements on top of the frame
  3. save it with the ffMpegFrameRecorder

  basicaly I have working version of this algorithm in Java (using java wrapper over native ffmpeg)

  Now I need to implement that processing with Azure Cloud Services.

  My question is
  What is a good ffmpeg wrapper for .net (console interface is not enough for my scenario) ?
  How to use it in Azure Cloud Service (sorry for noob question, but I am new to Azure) ?

• How to convert .mov files to .mp4 (H264) using ffmpeg using windows .bat file ?

  13 juillet 2013, par kheya

  I have a number of different video files (mov, avi, flv, mp4, 3gp, wmv) in a folder.

  I need to use a batch file that will convert all mov, avi, wmv, 3gp files in the folder
  Also I need to skip any flv, mp4 files

  I have this command, but it gives error and generates 0 size files :

  for %%F in (*.mov) do ffmpeg.exe -i "%%~fF" -vcodec copy -acodec copy "%%~dpF\%%~nF.mp4"

  The above line just tries to process mov files. I get same result for avi files.

  I want to keep the file name same. I get the file names correctly but it gives error :

      ffmpeg version N-54691-g7f4a1fd Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jul 12 2013 16:31:48 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
  
  amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
  
  enable-libxvid --enable-zlib
  
    libavutil      52. 39.100 / 52. 39.100
  
    libavcodec     55. 18.102 / 55. 18.102
  
    libavformat    55. 12.102 / 55. 12.102
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 80.101 /  3. 80.101
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Input #0, avi, from 'C:\musa\Challenge\FFMPEG\Test\file5.AVI':
  
    Metadata:
  
      encoder         : OPTURA20
  
    Duration: 00:00:10.01, start: 0.000000, bitrate: 1518 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p, 320x240, 14.99 fps,
  
   14.99 tbr, 14.99 tbn, 14.99 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16,
  
  256 kb/s
  
  [mp4 @ 00000000024bc980] Tag [1][0][0][0]/0x00000001 incompatible with output co
  
  dec id '65536' ([0][0][0][0])
  
  Output #0, mp4, to 'C:\musa\Challenge\FFMPEG\Test\\file5.mp4':
  
    Metadata:
  
      encoder         : OPTURA20
  
      Stream #0:0: Video: mjpeg (l[0][0][0] / 0x006C), yuvj422p, 320x240, q=2-31,
  
  14.99 fps, 90k tbn, 14.99 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, 256 k
  
  b/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invali
  
  d data found when processing input

• FFMPEG giving error on compiling on Windows

  1er août 2014, par user2384410

  Hi I am trying to build FFMPEG following :http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/
  I have set up all the things including changes in configure file and preparing build_android.sh but when I am trying to compile this using cygwin on my Windows machine,I get following error :-

  d :/android-ndk/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld.exe : error : libavutil/libavutil.so:1:1 : syntax error, unexpected ’ !’, expecting $end

  I am using NDK-r10 and Windows-7(64-bit).