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• Flutter error in Ffmpeg, "Unhandled Exception: ProcessException: No such file or directory" in macOS desktop version

  19 April 2024, by pratik vekariya

  I'm trying video trim video using ffmpeg, for macOS desktop application.

  


  I have downloaded ffmpeg from here for macOS.

  


  Here is my code

  


      String mainPath = &#x27;Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug/&#x27;;&#xA;        mainPath = mainPath.substring(0, mainPath.lastIndexOf("/"));&#xA;    &#xA;                  Directory directoryExe3 = Directory("$mainPath");&#xA;                  var dbPath = path.join(directoryExe3.path,&#xA;                      "App.framework/Resources/flutter_assets/assets/ffmpeg/ffmpegmacos");&#xA;//here in "Products/Debug/" folder desktop app will generate&#xA;&#xA;//directoryExe3 path will be, Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug&#xA;&#xA;//and dbPath will be, Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug/App.framework/Resources/flutter_assets/assets/ffmpeg/ffmpegmacos&#xA;&#xA;//so when app will run it can access it from this path&#xA;&#xA;//executable code, command for ffmpeg&#xA;&#xA;String transpose_str &#x2B;= "crop=" &#x2B;&#xA;              out_w.toInt().toString() &#x2B;&#xA;              ":" &#x2B;&#xA;              out_h.toInt().toString() &#x2B;&#xA;              ":" &#x2B;&#xA;              x!.toInt().toString() &#x2B;&#xA;              ":" &#x2B;&#xA;              y!.toInt().toString() &#x2B;&#xA;              ",";&#xA;          transpose_str &#x2B;= "scale=960:192";&#xA;&#xA;Future<processresult> result_ = Process.run(dbPath, [&#xA;                "-ss",&#xA;                timestamp,&#xA;                "-i",&#xA;                inputFilePath,&#xA;                "-t",&#xA;                endTime,&#xA;                "-vf",&#xA;                transpose_str,&#xA;                "-an",&#xA;                "./temp.mp4",&#xA;              ]); &#xA;</processresult>

  


  Now when I run this in macOS desktop verison, it gives me error at Process.run that in dbPath, Unhandled Exception: ProcessException: No such file or directory.

  


  Any help would be appreciate!

  


  when i run this as desktop version it should get file from assets.

  


• create thumbnails on laravel with ffmpeg

  30 October 2016, by rafitio

  i want to create a thumbnails on video that uploaded, i’ve been using mmpeg, i’ve been try this code but it not working yet

  this is my code on controller

  use ffmpeg\FFMPEG;
  
  
  
      public function store(Request $request)
  
  {
  
  
  
      $news = new News;
  
  
  
      $filename = $request->file('attachment')->getClientOriginalName();
  
      $request->file('attachment')->storeAs('attachment', $filename);
  
  
  
      $thumbnails = new FFMPEG;
  
      $thumbnails->getThumbnails($filename, 'thumbnails', 5);
  
  }   

  i’ve been also setting on config/app.php like this

  LinkThrow\Ffmpeg\Provider\FfmpegServiceProvider::class, //providers

  'FFMPEG' => LinkThrow\Ffmpeg\Facade\FfmpegFacade::class, //aliases

  the error is

  Class ’ffmpeg\FFMPEG’ not found

  is there need to setting up on config/ffmpeg.php too ?

• The Fastest Way To Learn Assembly Language

  4 September 2011, by Multimedia Mike — Programming

  I saw an old StackOverflow thread linked from Hacker News asking how to whether it’s worthwhile to learn assembly language and how to go about doing so. I’d like to take a stab at the last question.

  The fastest way to learn an assembly language is to reverse engineer something. Seriously, start with something that you know (like a C program that you wrote yourself) and take it apart. The good news is that assembly language is very simple and you will get a lot of practice in a short amount of time with RE.

  So here’s how you do it:

  • Take a simple program in C and build it with your tool chain, whether GNU gcc on Linux, Xcode on Mac, or MSVC on Windows. Also, make sure to turn on debugging symbols during compilation (this will help annotate the disassembly).
  • On Linux, use objdump: objdump -d program_binary
  • On Mac, use otool: otool -tV program_binary
  • On Windows: I admit, I’m a bit fuzzy on this one– I’m quite certain there’s a standard MSVC tool that prints the assembly listing.

  Anyway, look at the disassembled code and find the main() function. Work from there. Whatever the first instruction is, look it up on Google. You’ll likely find various CPU manuals that will explain the simple operation of the instruction. Look up the next unfamiliar instruction, then the next. Trust me, you’ll become an ASM expert in no time.

  Good luck!