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• How to get estimate time in FFmpeg using php ?

  4 février 2019, par Pooja Jadav

  I’m using FFmpeg for in my project to overlay a video using php.

  I have been included a queue for command execute. So, sometimes many requests in queue, and take a long time to execute.

  That’s why, I have to show the progress bar for user identifies, how many time will take for creates it video. For this scenario, I have to take estimate time.

  Maybe it’s possible to calculate it by other params that are shown in the output such as fps, bitrate or speed.

  Any ideas ?

   //DownloadJob.php;
  
  
  
   public function __construct($video,$transparent_img,$output_file)
  
    {
  
      $this->video=$video;
  
      $this->transparent_img = $transparent_img;
  
      $this->output_file = $output_file;
  
      $create_at = date('Y-m-d H:i:s');
  
      $this->status =0;
  
      $this->download_id = base64_encode($video);
  
  
  
      DB::beginTransaction();
  
      DB::insert('INSERT INTO jobs_download(download_id,image,video,status,output_video,create_time)
  
                  VALUES(?,?,?,?,?,?)',[$this->download_id,$this->video,$this->transparent_img,$this->status,$this->output_file,$create_at]);
  
      DB::commit();
  
  }
  
  
  
  public function handle()
  
  {
  
      $video=$this->video;
  
      $transparent_img=$this->transparent_img;
  
      $output_file=$this->output_file;
  
      $ready=1;
  
      $failed=2;
  
  
  
      $input_video = $video;
  
      $transparent_img = $transparent_img;
  
  
  
      try{
  
          $ffmpeg = "C:\\ffmpeg\\bin\\ffmpeg";
  
          $cmd = $ffmpeg . " -i " . $input_video . " -i " . $transparent_img . " -filter_complex 'overlay' " . $output_file;
  
          //Log::info($cmd);
  
          exec($cmd, $output);
  
  
  
          if(file_exists($output_file)){
  
  
  
              DB::beginTransaction();
  
              DB::update('UPDATE jobs_download SET status=? WHERE download_id =?',[$ready,$this->download_id]);
  
              $this->status = 1;
  
              DB::commit();
  
  
  
              if(file_exists($input_video)){
  
                  unlink($input_video);
  
              }
  
  
  
              if(file_exists($transparent_img)){
  
                  unlink($transparent_img);
  
              }
  
  
  
          }else{
  
              Log::error('DownloadJob.php failed()',['download_id'=>$this->download_id]);
  
              DB::beginTransaction();
  
              DB::update('UPDATE jobs_download SET status=? WHERE download_id =? ',[$failed,$this->download_id]);
  
              $this->status = 3;
  
              DB::commit();
  
          }
  
      }catch (\Exception $e){
  
          Log::error('DownloadJob.php failed()',['download_id'=>$this->download_id]);
  
          DB::beginTransaction();
  
          DB::update('UPDATE jobs_download SET status=? WHERE download_id =? ',[$failed,$this->download_id]);
  
          $this->status = 3;
  
          DB::commit();
  
      }
  
  }
  
  
  
  public function failed()
  
  {
  
      $failed = 2;
  
      Log::error('DownloadJob.php failed()',['download_id'=>$this->download_id]);
  
      DB::beginTransaction();
  
      DB::update('UPDATE jobs_download SET status=? WHERE download_id =? ',[$failed,$this->download_id]);
  
      $this->status = 3;
  
      DB::commit();
  
  }
  
  
  
  public function getResponse()
  
  {
  
      return ['download_id' => $this->download_id,'eta_time_sec' => $eta_time_sec];
  
  }

  //FFmpegController.php

  public function generateVideo(Request $request_body)
  
  {
  
          //Overlay file
  
          $transparent_img=Input::file('transparent_img');
  
          //Main file
  
          $video=Input::file('video');
  
          $output_file = $video_name;
  
          //Send in queue for ffmpeg overlay
  
          $job = new DownloadJob($video_name,$image,$output_file);
  
          $data = $this->dispatch($job);
  
  
  
          $dl_url = $job->getResponse();//Get response download_id and estimate time in second
  
         print_r($dl_url);

  }

  Output

  I want to this answer in my output result.

     [
  
      'download_id':'NWM1ODAwNDU3NzkxOV92aWRlb19maWxlXzE1NDkyNzExMDkubXA0',
  
      'eta_time_sec':5
  
     ]

  How can I get estimation time in seconds from fps, bitrate or speed but I have no clue..

• ffmpeg cut a video starting at n frames before a specific time ?

  1er septembre 2018, par hl037_

  I would like to cut a video (with ffmpeg) starting at n frames before a specific time, say 100 frames exactly before 00:08:05.042, is it possible ?

  (even if I don’t need it, is there a possibility to also specify a frame offset for the end ?)

• ffmpeg concat takes too much time

  7 juillet 2021, par DavidB

  Trying to concatenate large mp4 files. Before 48000 if it takes about 500ms to be done, then after 48000 time increases dramatically to 10000ms. What I am missing ?

  


  ffmpeg -f concat -safe 0 -i cn.txt -c copy concated.mp4

$cn_txt = 
"ffconcat version 1.0
file t.mp4
outpoint 48000
file ad.mp4";
  // outputs in 500ms

$cn_txt = 
"ffconcat version 1.0
file t.mp4
outpoint 49000
file ad.mp4";
  // outputs in 10000ms