Sur d’autres sites (3795)

• Running ffmpeg with arguments that exceed to command prompt character limit ? [duplicate]

  4 décembre 2019, par Kaxemer

  This question already has an answer here :

  • FFMPEG getting error - The filename or extension is too long
    
    1 answer
    

  I have a code where I need to stack some videos on top of each other. I create a string with some arguments and then C# executes ffmpeg with those arguments. An example would be like this

  -i "file1.webm" -i "file2.webm" (bunch of files) -i "fileN.webm" -filter_complex "[0:v]scale=1920x1080,setdar=dar=4/3[v0];[1:v]scale=1920x1080,setdar=dar=4/3[v1];(bunch of filters)[N:v]scale=1920x1080,setdar=dar=4/3[vN];[v0][v1](bunch of Vx)[vN]vstack=inputs=N[output]" -map [output] output.webm

  where N is the number of files.

  So I have a loop that automatically creates a string with these arguments. I have C# execute the process in windows and when I have a high N value, ffmpeg exits with exit code 1. I can’t execute the command with the arguments in command prompt because the commands exceed the character limit of a single command in command prompt. I hypothesize that this might be why it fails with high N. Is there a way to work around this (maybe reading the input arguments from a text file) ?

• Running an FFprobe process in Xcode to return file duration data

  24 octobre 2019, par NCrusher

  Using this example, I was able to create a process to run ffmpeg from the main resource bundle of a MacOS app. The fact that I was able to get it to work, however, was really dumb luck.

  But now I need to be able to do something similar with ffprobe, along the lines of what is discussed in this post, to get the duration of an audio file in order to trim a set number of seconds off the end of it, using these arguments :

  ffprobe -v 0 -show_entries format=duration -of compact=p=0:nk=1 input.m4b

  But I don’t know how to implement it. This is basically what I want to accomplish :

      func insertTrimArguments() {
  
          conversionSelection()
  
          if trimStartEndClipsCheckbox.state == .on {
  
              ffmpegArguments.insert(contentsOf: ["-ss", "00:00:02.000", /*"-t", "duration minus 4.2secs"]*/, at: 3)
  
          }
  
          else {
  
          }
  
      }

  I haven’t been coding in Swift long and processes are entirely new for me and not something that was ever covered in any of the "fundamentals" tutorials I studied before I began my project. Taking the monkey-see/monkey-do approach from the first example I linked, I can sort of make a start imitating it for my ffprobe function, but I have no idea if I’m doing it right or where to go with it from here.

  This is all I have so far.

      // get file duration and subtract 4.2 seconds if "trim audible clips is enabled, then insert additional arguments into conversionSelection arrays
  
      func getFileDuration() {
  
          guard let ffprobePath = Bundle.main.path(forResource: "ffprobe", ofType: "") else { return }
  
          do {
  
              let ffprobeTask: Process = Process()
  
              ffprobeTask.launchPath = ffprobePath
  
              ffprobeTask.arguments = [
  
                  "-v", "error",
  
                  "-show_entries",
  
                  "format=duration", "-of",
  
                  "compact=p=0:nk=1",
  
                  "\(inputFilePath)"]
  
              ffprobeTask.standardInput = FileHandle.nullDevice
  
              ffprobeTask.launch()
  
              ffprobeTask.waitUntilExit()
  
          }
  
      }

  How do I adapt this process so that instead of converting and outputing a new file, it returning the duration of the input file so that I can do the necessary math and include it in my arguments ?

• Laravel FFmpeg error ffprobe running command -show_streams -print_format json is not running How i can resolve it ?

  12 octobre 2019, par Shahzad Waris

  I’m using laravel FFmpeg Package v4 to change the Dimension of the video.
  This is my queue log.

  [2019-10-12 15:14:17] local.INFO : ffprobe running command
  "C :/FFmpeg/bin/ffprobe.exe"
  C :\wamp64\www\creamer\creamer\storage\app\public\videos1570870350.mp4
  -show_streams -print_format json [2019-10-12 15:14:17] local.ERROR : ffprobe failed to execute command "C :/FFmpeg/bin/ffprobe.exe"
  C :\wamp64\www\creamer\creamer\storage\app\public\videos1570870350.mp4
  -show_streams -print_format json [2019-10-12 15:14:17] local.ERROR : Unable to probe
  C :\wamp64\www\creamer\creamer\storage\app\public\videos1570870350.mp4
  "exception" :"[object] (FFMpeg\Exception\RuntimeException(code : 0) :
  Unable to probe
  C :\wamp64\www\creamer\creamer\storage\app\public\videos1570870350.mp4
  at
  C :\wamp64\www\creamer\creamer\vendor\php-ffmpeg\php-ffmpeg\src\FFMpeg\FFProbe.php:263,
  Alchemy\BinaryDriver\Exception\ExecutionFailureException(code : 0) :
  ffprobe failed to execute command \"C :/FFmpeg/bin/ffprobe.exe\"
  C :\wamp64\www\creamer\creamer\storage\app\public\videos1570870350.mp4
  -show_streams -print_format json at C :\wamp64\www\creamer\creamer\vendor\alchemy\binary-driver\src\Alchemy\BinaryDriver\ProcessRunner.php:100)
  [stacktrace]

  0 C :\wamp64\www\creamer\creamer\vendor\php-ffmpeg\php-ffmpeg\src\FFMpeg\FFProbe.php(206) :

  FFMpeg\FFProbe->probe(’C :\wamp64\www\c...’, ’-show_streams’,
  ’streams’)

  1 C :\wamp64\www\creamer\creamer\vendor\php-ffmpeg\php-ffmpeg\src\FFMpeg\FFMpeg.php(92) :

  FFMpeg\FFProbe->streams(’C :\wamp64\www\c...’) [internal
  function] : Illuminate\Queue\Console\WorkCommand->handle() 1 :
  https://github.com/pascalbaljetmedia/laravel-ffmpeg?ref=madewithlaravel.com

  This is Queue code :

  namespace App\Jobs;
  
  
  
  use App\Video;
  
  use FFMpeg;
  
  use FFMpeg\Coordinate\Dimension;
  
  use FFMpeg\Format\Video\X264;
  
  use Illuminate\Bus\Queueable;
  
  use Illuminate\Contracts\Queue\ShouldQueue;
  
  use Illuminate\Foundation\Bus\Dispatchable;
  
  use Illuminate\Queue\InteractsWithQueue;
  
  use Illuminate\Queue\SerializesModels;
  
  
  
  class ConvertVideoForDownloading implements ShouldQueue
  
  {
  
      use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
  
      public $video;
  
      /**
  
       * Create a new job instance.
  
       *
  
       * @return void
  
       */
  
      public function __construct(Video $v)
  
      {
  
          $this->video = $v;
  
      }
  
  
  
      /**
  
       * Execute the job.
  
       *
  
       * @return void
  
       */
  
      public function handle()
  
      {
  
          // create a video format...
  
          $lowBitrateFormat = (new X264)->setKiloBitrate(500);
  
  
  
          // open the uploaded video from the right disk...
  
          FFMpeg::fromDisk('local')
  
              ->open('public\videos' . $this->video->videoLink)
  
  
  
          // add the 'resize' filter...
  
              ->addFilter(function ($filters) {
  
                  $filters->resize(new Dimension(960, 540));
  
              })
  
  
  
          // call the 'export' method...
  
              ->export()
  
  
  
          // tell the MediaExporter to which disk and in which format we want to export...
  
              ->toDisk('local')
  
              ->inFormat($lowBitrateFormat)
  
  
  
          // call the 'save' method with a filename...
  
              ->save($this->video->id . '.mp4');
  
  
  
          // update the database so we know the convertion is done!
  
          // $this->video->update([
  
          //     'converted_for_downloading_at' => Carbon::now(),
  
          // ]);
  
  
  
      }
  
  }