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• FFMPEG on Windows faststart command line with or without a +

  24 juillet 2014, par C0nw0nk

  So on the following wiki page i see ffmpeg tells us when using faststart for HTML5 compatibility we should use a + symbol.

  https://trac.ffmpeg.org/wiki/Encode/H.264#faststartforwebvideo

  -movflags +faststart

  But looking at command line examples on here and other sites everyone puts it in their command line like this.

  ffmpeg -i C:\vidtests\Wildlife.mp4 -movflags faststart C:\vidtests\Wildlife_fs.mp4

  So my question is should it matter if the + symbol is there or not ?

• 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).

• 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