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• how to use x264 dll in another project

  5 août 2014, par Hadi Rasekh

  enter code here I want to use x264 in my project. There is some line in the code said :

  /* Application developers planning to link against a shared library version of
* libx264 from a Microsoft Visual Studio or similar development environment
* will need to define X264_API_IMPORTS before including this header.
* This clause does not apply to MinGW, similar development environments, or non
* Windows platforms. */

  But I don’t get this line :
  define X264_API_IMPORTS before including this header

  We can create x264 dll by its configuration and make

      ./configure --enable-shared
  
      make

  but I can not use the dll in my Qt Project.

  I can make my own dll (in another code) and use it in the project.
  But when I start to use x264 dll in my project I get the following error :

      C:\DataHiding\SourceCode2\GUI\DataHiding\mainwindow.cpp:10: error:
  
      'pulldown_frame_duration' was not declared in this scope
  
      qDebug() << pulldown_frame_duration[1];
  
               ^

• how to use x264 dll in another project

  5 août 2014, par Hadi Rasekh

  enter code here I want to use x264 in my project. There is some line in the code said :

  /* Application developers planning to link against a shared library version of
* libx264 from a Microsoft Visual Studio or similar development environment
* will need to define X264_API_IMPORTS before including this header.
* This clause does not apply to MinGW, similar development environments, or non
* Windows platforms. */

  But I don’t get this line :
  define X264_API_IMPORTS before including this header

  We can create x264 dll by its configuration and make

      ./configure --enable-shared
  
      make

  but I can not use the dll in my Qt Project.

  I can make my own dll (in another code) and use it in the project.
  But when I start to use x264 dll in my project I get the following error :

      C:\DataHiding\SourceCode2\GUI\DataHiding\mainwindow.cpp:10: error:
  
      'pulldown_frame_duration' was not declared in this scope
  
      qDebug() << pulldown_frame_duration[1];
  
               ^

• ffprobe failing on certain videos

  19 mars 2020, par griswoldbar

  I work on a platform that uses ffprobe as part of a video transcoding pipeline. One of our users is trying and failing to upload video clips extracted from a CCTV system, and it seems the failure is occurring when we parse the clips with ffprobe.

  When I run ffprobe from the command line, I get this :

  $ ffprobe file.avi
  
  ffprobe version 4.2.2 Copyright (c) 2007-2019 the FFmpeg developers
  
    built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  [avi @ 0x7fc22280b800] Invalid sample_size -1 at stream 1 setting it to 0
  
  [avi @ 0x7fc22280b800] Invalid sample_size -1 at stream 2 setting it to 0
  
  [avi @ 0x7fc22280b800] wav header size < 14 is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
  
  [avi @ 0x7fc22280b800] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
  
  file.avi: Invalid data found when processing input

  I am however able to parse it with mediainfo, which outputs this :

  $ mediainfo file.avi
  
  General
  
  Complete name                            : file.avi
  
  Format                                   : AVI
  
  Format/Info                              : Audio Video Interleave
  
  File size                                : 11.3 MiB
  
  Duration                                 : 5 min 0 s
  
  Overall bit rate                         : 316 kb/s
  
  
  
  Video
  
  ID                                       : 0
  
  Format                                   : MPEG-4 Visual
  
  Codec ID                                 : MP43
  
  Codec ID/Info                            : Microsoft MPEG-4 v3 (pre-standard)
  
  Codec ID/Hint                            : Microsoft
  
  Duration                                 : 5 min 0 s
  
  Source duration                          : 5 min 0 s
  
  Bit rate                                 : 308 kb/s
  
  Width                                    : 640 pixels
  
  Height                                   : 480 pixels
  
  Display aspect ratio                     : 4:3
  
  Frame rate                               : 16.000 FPS
  
  Compression mode                         : Lossy
  
  Bits/(Pixel*Frame)                       : 0.063
  
  Stream size                              : 11.0 MiB (97%)

  I’m guessing/hoping that there’s a way to make this work by passing appropriate flags to ffprobe - can anyone point me in the right direction ?