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• Mingw-w64 - printf does not work

  27 décembre 2013, par Gosha U.

  First I wanted to modificate ffplay according to my requirments. Then I noticed that original ffplay from my build can't play some video files, but it didn't write any message to console. Then I noticed that ffmpeg also don't write any usage message when I run it without params. But it works. If I run it from terminal it's like running asynchronously ! The terminal just shows next row. I mean it asks for a next command. But the ffmpeg process is visible in task manager and it writes the output video file what I had requested !

  I created following souce file. I have modified the Makefile. So it have built the exe-file works just the same way. I have no idea how it can be.

  #include 
  
  #include "cmdutils.h"
  
  
  
  const char program_name[] = "hello";
  
  const int program_birth_year = 2013;
  
  
  
  void show_help_default(const char *opt, const char *arg)
  
  {
  
      printf("zxcvbnm\n");
  
  }
  
  
  
  int main(int argc, char **argv)
  
  {
  
      printf("1234567890\n");
  
      return 0;
  
  }

  And after that I created real hello world app with MinGW-w64 and qmake without eny extra libs. And its printf does not work.

  I want to prevent this behavior.

  I want to make printf working in traditional manner.

  How I build FFmpeg :

  PKG_CONFIG_PATH=/home/developer/workspace/MinGW32fs/lib/pkgconfig/ \
  
  SDL_CONFIG=/home/developer/workspace/MinGW32fs/bin/sdl-config \
  
  ./configure \
  
    --prefix=/home/developer/workspace/MinGW32fs \
  
    --extra-ldflags="-L/home/developer/workspace/MinGW32fs/lib" \
  
    --extra-cflags="-I/home/developer/workspace/MinGW32fs/include" \
  
    --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32-  \
  
    --pkg-config=pkg-config   --enable-libtheora --enable-libvorbis --enable-libvpx \
  
    --enable-outdev=sdl --enable-shared --disable-static \
  
    --disable-doc --disable-manpages --disable-podpages
  
  
  
  make

• FFMpeg metadata issue

  12 février 2015, par TameHog

  whenever I run ffmpeg -i filename it returns something like this :

   Metadata:
  
  major_brand     : mp42
  
  minor_version   : 0
  
  compatible_brands: isommp42
  
  creation_time   : 2010-07-16 18:33:45
  
  Duration: 00:00:24.00, start: 0.000000, bitrate: 2443 kb/s
  
  Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s
  
  Metadata:
  
    creation_time   : 2010-07-16 18:33:45
  
    handler_name    : Mainconcept MP4 Sound Media Handler
  
  Stream #0:1(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2311 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc
  
  Metadata:
  
    creation_time   : 2010-07-16 18:33:46
  
    handler_name    : Mainconcept MP4 Video Media Handler

  Except when I run it from java using :

  ProcessBuilder pb = new ProcessBuilder(new String[]{"ffmpeg", "-i", "filename"});
  
      pb.redirectErrorStream(true);
  
      try{
  
          Process p = pb.start();
  
  
  
          BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
  
          String bs = "";
  
          while(br.readLine() != null){
  
              bs += br.readLine();
  
              bs += "\n";
  
          }
  
          return bs;
  
      }catch(IOException e){
  
          e.printStackTrace();
  
      }

  it gives me this :

        built on Jun 17 2013 23:20:06 with gcc 4.6 (GCC)
  
    Metadata:
  
      minor_version   : 0
  
      creation_time   : 2010-07-16 18:33:45
  
      Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s
  
        creation_time   : 2010-07-16 18:33:45
  
      Stream #0:1(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR     4:3], 2311 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc
  
            creation_time   : 2010-07-16 18:33:46
  
      At least one output file must be specified

  How come when I run it from cmd I get way more data ? Can anybody tell me what I am doing wrong ?

• Extract files from mpeg video

  28 octobre 2013, par A Dark Divided Gem

  Videos created with Camtasia can be shared on the web by exporting the project for the TechSmith Smart Player. The video is exported in the "H264 - MPEG-4 AVC (part10) (avc1)" codec and the export also includes other custom XML, JavaScript and SWF files used by the TechSmith Smart Player.

  These custom files are also "burnt" into the video itself. For example the contents of the XML file can be viewed when opening the MP4 video in a text editor. This allows other services to only ask for the MP4 file when uploading Camtasia videos.

  Therefore my question is how do you extract text and binary files from a MP4 video file ? For this project I am limited to Java but I am happy to call an external executable as well.

  I tried the "-dump_attachment" option in FFmpeg but that didn't work and I am out of ideas.

  C :\Users\Desktop>ffmpeg -dump_attachment:t "" -i getting-started-project.mp4
  ffmpeg version N-57448-gc78a416 Copyright (c) 2000-2013 the FFmpeg developers
    built on Oct 26 2013 18:08:54 with gcc 4.8.2 (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-libvidstab —enable-libvo-aa
  cenc —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavp
  ack —enable-libx264 —enable-libxavs —enable-libxvid —enable-zlib
    libavutil      52. 47.101 / 52. 47.101
    libavcodec     55. 38.101 / 55. 38.101
    libavformat    55. 19.104 / 55. 19.104
    libavdevice    55.  5.100 / 55.  5.100
    libavfilter     3. 89.100 /  3. 89.100
    libswscale      2.  5.101 /  2.  5.101
    libswresample   0. 17.104 /  0. 17.104
    libpostproc    52.  3.100 / 52.  3.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'getting-started-project.mp4' :
    Metadata :
      major_brand : mp42
      minor_version : 0
      compatible_brands : isommp42
      creation_time : 2013-10-24 15:53:19
      artist :
      description :
      title : Untitled
    Duration : 00:05:41.12, start : 0.000000, bitrate : 314 kb/s
      Stream #0:0(eng) : Video : h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv), 6
  40x360 [SAR 1:1 DAR 16:9], 185 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
      Metadata :
        creation_time : 2013-10-24 15:53:19
        handler_name : Mainconcept MP4 Video Media Handler
      Stream #0:1(eng) : Audio : aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 12
  5 kb/s (default)
      Metadata :
        creation_time : 2013-10-24 15:53:19
        handler_name : Mainconcept MP4 Sound Media Handler
   At least one output file must be specified

  Update : It appears the XML is contained within a custom UUID atom and I just need a way of extracting that.

  Thanks