Recherche avancée

Sur d’autres sites (9959)

• How to link FFmpeg libraries with CMake in windows

  4 juillet 2021, par ldall03

  I'm new to CMake and not very familiar with how linking/compiling works. I am on windows 10 using MinGW in CLion. As the title says I want to use FFmpeg libraries in my c++ code. I downloaded the source code from : https://ffmpeg.org/download.html (Download Source Code button). I unzipped it and put the libavcodec library in my project. Here is my project structure :

  


  project
   \-- cmake-build-debug
   \-- src
      \-- vendor
         \-- libavcodec
   \-- main.cpp
   \--CMakeLists.txt


  


  Here is my main.cpp file :

  


  extern "C" {&#xA;#include "libavcodec/avcodec.h"&#xA;}&#xA;&#xA;#include <iostream>&#xA;&#xA;int main(int argc, char *argv[]) {&#xA;    std::cout &lt;&lt; "Hello World\n";&#xA;    return 0;&#xA;}&#xA;&#xA;</iostream>

  


  And my CMakeLists.txt file :

  


  cmake_minimum_required(VERSION 3.19)
project(VidShare)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_PREFIX_PATH  "C:/Qt/6.1.1/mingw81_64/lib/cmake")

find_package(Qt6Widgets REQUIRED)

set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)

add_executable(VidShare main.cpp)
include_directories(src src/vendor)
target_link_libraries(VidShare Qt6::Widgets Qt6::Core Qt6::Gui)


  


  Ignore the Qt stuff it works fine.

  


  And well when I build I get this error message :

  


  fatal error: libavutil/avconfig.h: No such file or directory
 #include "libavutil/avconfig.h"


  


  I've seen that I had to run a configure script in the FFmpeg main file but I'm on windows so I can't really do that. I don't know if I have to use other kinds of libraries or if I downloaded the wrong thing... I am really at lost here. There is probably a better or more convenient way of doing what I want but I could not find many resources on it... Help would be appreciated :)

  


• How to use pathinfo in php ?

  10 juin 2019, par flash

  I am working on a php code as shown below on which Line#A prints the following array (shown below php code). My code doesn’t seems to go inside switch statement. I am not sure why.

  I added print_r($parts) at Line A in order to print the value of $parts.

  php code :

  <?php
  
      if (!empty($_POST['id']))
  
      {
  
      for($i=0; $i / Line A
  
      switch ($parts['extension'])
  
      {
  
      echo "Hello World";                 // Line B
  
      case 'mp4' :
  
      $filePath = $src_dir . DS . $f;
  
      system('ffmpeg -i ' . $filePath . ' -map 0:2 -ac 1 ' . $destination_dir . DS . $parts['filename'] . '.mp3', $result);
  
      }
  
      }
  
      }
  
      }
  
  ?>

  Output (Line#A) :

  Array 
  
  (
  
      [dirname]  => .
  
      [basename] => hello.mp4
  
      [extension] => mp4
  
      [filename] => hello
  
  )

  I have used echo "Hello World" at Line B but for some reasons, its not getting printed and throwing 500 internal server error on console.

  Problem Statement :

  I am wondering what changes I should make in the php code so that it goes inside switch statement.

• FFMPEG - How to get a blur effect, without altering the color white ?

  17 août 2016, par Hugo

  I need a picture, with blur effect background. I found the code works, but, the white color of the photos is lost ( only happens with white color)...

  Step1 : ffmpeg -i eyes.jpg -s 640x360 -qscale 1 bg.jpg
  Step2 : ffmpeg -i bg.jpg -filter_complex "[0:v]crop=640:360:0:0,boxblur=20[fg] ;[0:v][fg]overlay=0:0[v]" -map "[v]" -qscale 1 bg.jpg -y
  Step3 : ffmpeg -i bg.jpg -i eyes.jpg -filter_complex "overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/2" -qscale 1 result.jpg
  

  Original photo :
  see original photo

  Result (white color is lost)
  see result photo

  Please I need help (The white color should remain).

  Thank you very much,
  Greetings,
  Hugo