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• Qt C++ ffmpeg cannot find library

  7 juin 2013, par Carnifrex

  I use Qt 5.0.2 with Mingw 4.7 on windows.

  I'm working on a c++ program and i'm trying to get the duration of video files. I found ffmpeg. Now i tried to compile a simple program but I think it fails with the libraries. I've tried to include both the shared and dev but they both will fail. ( Zeranoe FFmpeg builds)

  This is my pro file :

  TEMPLATE = app
  
  CONFIG += console
  
  CONFIG -= app_bundle
  
  CONFIG -= qt
  
  
  
  SOURCES += main.cpp
  
  
  
  INCLUDEPATH += C:\programming\ffmpeg-20130606-git--win32-shared\bin
  
  
  
  LIBS += -LC:\programming\ffmpeg-20130606-git--win32-shared\bin -lavcodec-55.dll -     lavformat-55.dll -lavutil-52.dll

  i get errors like :

  " :-1 : error : cannot find -lavcodec-55.dll"

  " :-1 : error : cannot find -lavformat-55.dll"

  I've also tried :

  INCLUDEPATH += C:\programming\ffmpeg-20130606-git--win32-dev\include
  
  INCLUDEPATH += C:\programming\ffmpeg-20130606-git--win32-dev\lib
  
  
  
  LIBS += -LC:\programming\ffmpeg-20130606-git--win32-dev\lib -lavcodec -lavformat -lavutil
  
  
  
  LIBS += -LC:\programming\ffmpeg-20130606-git--win32-dev\lib -llibavcodec.dll.a -llibavformat.dll.a -llibavutil.dll.a

  Here it gives a error "During startup program exited with code 0x0000135'

  I even tried to include each library individually. But no results..

  This is my main file :

  #include <iostream>
  
  using namespace std;
  
  extern "C" {
  
    #include <libavcodec></libavcodec>avcodec.h>    // required headers
  
    #include <libavformat></libavformat>avformat.h>
  
  }
  
  int main(int argc, char**argv) {
  
     av_register_all();             // offending library call
  
     return 0;
  
  }
  
  </iostream>

  A program simple as this will have 2 outcomes :

  1. the program runs but crashes if i call 'av_register_all()'
  2. It just tells me he cannot find the libraries.

  Can someone tell me what it is i'm doing wrong ? Or even give me a hint ? I can't really find a lot of good documentation on this one.

  Thanks in advance !

• FFMpeg Can't find libvorbis under Windows

  27 février 2014, par Water Lin

  I try to use FFMpeg to generate MKV video format. By default, FFMpeg will using h264 & libvorbis. But when I using the doc/examples/muxing.c under ffmpeg source file folder, there is always an error :

  [libvorbis @ 002e52a0] Specified sample format s16 is invalid or not supported
  
  Could not open audio codec: Error number -22 occurred

  I used Zeranoe FFmpeg and showed this error. I also tried to compile the ffmpeg from source under MinGW, and I also enable the libvorbis by following comfiguration :

  $ ./configure --prefix=/mingw --enable-libvpx --enable-libvorbis --enable-shared --enable-static

  Before I make, I also install libvorbis, libogg, yasm etc. But the error is still there.

  If I use the ffmpeg.exe to convert video to webm format, it works. The command is like following :

  ffmpeg -i test.h264 -vcodec libvpx -acodec libvorbis output.webm

  The generated output.webm can be played by Firefox or something else. So I think the compiled ffmpeg library is OK. But why I can't generate webm file in muxing.c code ?

• Révision 22208 : report de r22201 / Fixe #3418 : complément à r22119 ajouter une seconde à la duré...

  9 juin 2015, par b b