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• Problem with ffmpeg function avformat_seek_file()

  14 mars 2020, par Kael

  I am trying to seek the given frame in the video using ffmpeg library. I knew that there is av_seek_frame() function but it was recommended to use avformat_seek_file()instead. Something similar mentioned here.

  I know that avformat_seek_file() can’t always take you to exact frame you want, but this is ok for me. I just want to jump to the nearest keyframe. So i open the video, find videostream and calling it like this :

  avformat_seek_file( formatContext, streamId, 0, frameNumber, frameNumber, AVSEEK_FLAG_FRAME )

  It always returns 0, so i understand it as correct finish. However, it doesn’t work as it should to. I check byte position like here before and after calling avformat_seek_file(). Actually it changes, but it changes always in the same way whenever i’m trying to put different target frame numbers ! I mean that byteposition after this call is always same even with different frameNumber values. Obviously, i’m doing something wrong but i don’t know what exactly. I don’t know if it does matter but i’m using .h264 files for that. I tried different flags, different files, using timestamps instead of frames, flushing buffers before and after and so on but it doesn’t work for me. I will be very grateful if someone could show me what is wrong with it.

• Cannot find the class in php oop [duplicate]

  30 décembre 2018, par mr stark

  This question already has an answer here :

  • PHP class not found when using namespace
    
    2 answers
    

  I’m trying to make a class for video streaming with FFMpeg Php package.

  I’m getting this error on browser :

  Fatal error : Uncaught Error : Class ’Classes\Video’ not found in C :\xampp\htdocs\php\index.php:5 Stack trace : #0 main thrown in C :\xampp\htdocs\php\index.php on line 5

  this is my index.php :

    use Classes\Video;
  
  
  
    $video = new Video();
  
  
  
    $video->videoStreaming("video.mp4",320,240,"myVideo","WMV");

  and Video in Classes directory :

      namespace Classes;
  
      use FFMpeg\Coordinate\Dimension;
  
      use FFMpeg\FFMpeg;
  
      use FFMpeg\Format\Video\WMV;
  
      require "../vendor/autoload.php";
  
  
  
      class Video
  
      {
  
          private $ffmpeg;
  
          private $video;
  
  
  
  public function __construct()
  
  {
  
      $this->ffmpeg = FFMpeg::create([
  
          'ffmpeg.binaries' => 'C:\ffmpeg\ffmpeg.exe',
  
          'ffprobe.binaries' => 'C:\ffmpeg\ffprobe.exe',
  
          'timeout' => 3600,
  
          'ffmpeg.threads' => 12,
  
      ]);
  
  }
  
  
  
  public function videoStreaming($videoPath,$width,$height,$newName,$newExtension)
  
  {
  
      $this->video = $this->ffmpeg->open($videoPath);
  
      if ($width && $height) {
  
          $this->video->filters()->resize(new Dimension($width,$height))->synchronize();
  
      }
  
      $this->video->save(new WMV(), $newName . $newExtension);
  
  }
  
  
  
      }

• FFMPEG is not working in AWS lambda function

  13 novembre 2022, par Arun

  I am trying to convert a video file into an audio file using AWS lambda function whenever a file is uploaded into an S3 bucket. So I am using FFMPEG for converting a video file into audio. But I keep getting this error while converting a video file. I have seen similar questions but none of the solutions is not working for me. So If anyone knows please share your solutions.

  



  Error message

  



      TypeError: Cannot create property 'stack' on string 
'Could not find ffmpeg executable, tried "/var/task/node_modules/@ffmpeg-installer/linux-x64/ffmpeg" and "/var/task/node_modules/@ffmpeg-installer/ffmpeg/node_modules/@ffmpeg-installer/linux-x64/ffmpeg"'


  



  Code

  



      const
    ffmpegPath = require("@ffmpeg-installer/ffmpeg").path,
    ffmpeg = require("fluent-ffmpeg");

    // set ffmpeg package path
    ffmpeg.setFfmpegPath(ffmpegPath);
    function convert(input, output, callback) {
        ffmpeg(input)
            .output(output)
            .on('end', function() {                    
                console.log('conversion ended');
                callback(null);
            }).on('error', function(err){
                console.log('error: ', err.code, err.msg);
                callback(err);
            }).run();
    }

    exports.handler = function (event, context, callback) {
        const key = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, ' '));
        console.log("key ", key);
        console.log("event ", event.Records[0].s3);
        convert(key, `/tmp/${key}.mp3`, function(err){
            if(!err) {
                console.log('conversion complete');
            } else {
                console.log('Error');
            }
        });
    }


    const
        ffmpegPath = require("@ffmpeg-installer/ffmpeg").path,
        ffmpeg = require("fluent-ffmpeg");

    // set ffmpeg package path
    ffmpeg.setFfmpegPath(ffmpegPath);
    function convert(input, output, callback) {
        ffmpeg(input)
            .output(output)
            .on('end', function() {                    
                console.log('conversion ended');
                callback(null);
            }).on('error', function(err){
                console.log('error: ', err.code, err.msg);
                callback(err);
            }).run();
    }

    exports.handler = function (event, context, callback) {
        const key = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, ' '));
        console.log("key ", key);
        console.log("event ", event.Records[0].s3);
        convert(key, `/tmp/${key}.mp3`, function(err){
            if(!err) {
                console.log('conversion complete');
            } else {
                console.log('Error');
            }
        });
    }


  



  package.json

  



      "dependencies": {
    "@ffmpeg-installer/ffmpeg": "^1.0.17",
    "fluent-ffmpeg": "^2.1.2",
    "fs": "0.0.1-security"
  }