Recherche avancée

Sur d’autres sites (15740)

• Running FFMPEGJS in a React Project

  23 mars 2020, par beek

  I’m trying to get https://github.com/ffmpegjs/ffmpeg.js/ running in a Create React App build project.

  import {createWorker} from '@ffmpeg/ffmpeg';

  When I import the library the build fails with

  ./node_modules/@ffmpeg/ffmpeg/src/createWorker.js
  
  Module parse failed: Unexpected token (21:4)
  
  You may need an appropriate loader to handle this file type.
  
  |     logger,
  
  |     progress,
  
  |     ...options
  
  |   } = resolvePaths({
  
  |     ...defaultOptions,

  I’m not sure how to handle this, or where the problem might be. Is this a Webpack issue ?

• Can't compile dll from C++ project - Visual Studio

  11 octobre 2017, par FlowRyan

  I’m trying to play a RTSP stream in Unity 5.

  For that I found a RTSP-plugin for Unity on Github that I want to try, but unfortunatelly it comes with no Readme or installation guide whatsoever.

  So far I found out that I’m dealing with a C++ Visual Studio project that needs to be compiled into a DLL in order to add it to Unity. But when I try to build the project I get the following Error for the header file "ffmpegenv.h" :

  Error C1083 Cannot open include file : ’libavutil\opt.h’ : No such file or directory - (Screenshot)

  Here’s the code from the header file

  #pragma once
  
  
  
  //=============================
  
  // Includes
  
  //-----------------------------
  
  // FFMPEG is writen in C so we need to use extern "C"
  
  //-----------------------------
  
  extern "C" {
  
      //#define INT64_C(x) (x ## LL)
  
      //#define UINT64_C(x) (x ## ULL)
  
  
  
  #include 
  
  #include <libavutil></libavutil>mathematics.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  #include <libswresample></libswresample>swresample.h>
  
  #include <libavutil></libavutil>imgutils.h>
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  
  
  }

  I’m aware that the header includes source code from the FFmpeg libraries which doesn’t come with the plugin I’m trying to compile. So I downloaded the FFmpeg source code from their GitHub page and copied all the code files (with its original folder structure) inside the plugin’s project folder.

  However when I then try to compile the plugin, it still doesn’t find the #includes an shows the same error as mentioned above.

  How I can I get the plugin to compile ? What am I missing ?

  Thanks in advance

  P.S. : I’m using Visual Studio Community 2017 with C++ support and Win 10 SDK as well as Win 8.1 SDK.

• Emscripten : Linking library to project

  13 avril 2021, par locust

  I'm trying to build a small project that uses ffmpeg library to WebAssembly, with use of Emscripten. Before that, I tried it out by transpiling some simple program from C into Wasm and it worked fine, but that time I was not using any additional libraries.

  


  For C++ I'm working with Visual Studio and FFmpeg I linked in project's "Properties" as follows :

  


  


  1. all .h header files I placed in "include" catalog and I added it as "Additional Include Directories" in "C/C++" section

     


  


  2. all .lib and .dll.a (for example avcodec.lib or libavcodec.dll.a) files I placed in "lib" and added as "Additional Library Directories" in "Linker" section

     


  


  


  All includes and the program itself works fine, so now I was trying to prepare a Wasm module with Emscripten with the same same command that I used earlier, but already knowing that is not going to work :

  


  em++ cut_video.cpp -Os -g1 -L lib -I include -s WASM=1 -s FORCE_FILESYSTEM=1 -s ALLOW_MEMORY_GROWTH=1 -s EXPORT_ES6=1 -s MODULARIZE=1 -s "EXPORT_NAME='Editor'" -s "ENVIRONMENT='web'" -s EXPORTED_FUNCTIONS="['_doubler', '_cut_video', '_cut_video1']" -s ERROR_ON_UNDEFINED_SYMBOLS=0  -s ASSERTIONS=1 --bind -o cutter.js


  


  I added the "-I include" parameter which is suppose to be pointing to the same header files, that I mentioned above, and it seems to be fine for Emscripten, because the initial error was solved by it.
Emscripten already found out the problem with functions from ffmpeg library, so I added "ERROR_ON_UNDEFINED_SYMBOLS=0" just to see what will happen when I will add this module to front-end app. Obviously it end up with error "missing function : av_register_all", which is first ffmpeg function within my code.

  


  All explanations that can be helpful I found really unclear for me, because generally I'm not working with C++ or Linux environment, so I'm not fimilliar with Makefile or so.

  


  Is there a way, basing on what I described and how my project was prepared with Visual Studio, to tell the Emscripten to use those pre-build .dll.a or .lib files of FFmpeg for my app ? Or how should I modify my project to make it acceptable for Emscripten ?

  


  Edit : Since cut_video.cpp file is quite big, maybe it's a better idea to just paste here a link to this file on github instead of the big block of code.