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• Use ffmpeg to extract/remix audio from/into video

  2 décembre 2023, par user37143

  Working on a Mac, I have a bunch of .mkv files that I want to extract the audio from, then use an ML model I have in order to translate them and then mix them back into the video.

  


  For the extraction phase, I am running :
ffmpeg -i {input_video}.mkv -map 0:a -c copy {output_audio}.aac
however I am getting these errors :

  


  [adts @ 0x130708b30] Only AAC streams can be muxed by the ADTS muxer
[out#0/adts @ 0x6000031943c0] Could not write header (incorrect codec parameters ?): Invalid argument
[aost#0:1/copy @ 0x13070a050] Error initializing output stream: 


  


  which I suspect are because of subtitles, seeing these warnings earlier in the output :

  


  [matroska,webm @ 0x130704260] Could not find codec parameters for stream 4 (Subtitle: (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[matroska,webm @ 0x130704260] Could not find codec parameters for stream 5 (Subtitle:  (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[matroska,webm @ 0x130704260] Could not find codec parameters for stream 6 (Attachment: none): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options


  


  The only command that has worked for me so far is
ffmpeg -i {input_video}.mkv -vn -c:a aac {output_aduio}.wav which however created a completely empty audio file.

  


  Any help would be greatly appreciated

  


• how to upload a video to google driver use paperclip or carriwave

  14 janvier 2016, par bách trần nguyên

  i want to upload video to google driver.
  code models
  video model

  class Video < ActiveRecord::Base
  
    has_attached_file :video,
  
     :storage => :google_drive,
  
     :google_drive_credentials => {:client_id => AppConfig.gg_drive.client_id,
  
                                :client_secret => AppConfig.gg_drive.client_secret,
  
                                :refresh_token => AppConfig.gg_drive.refresh_token,
  
                                :scope => AppConfig.gg_drive.scope,
  
                                :access_token => Token.cache_access_token_google_drive
  
                                },
  
    :styles => {
  
      :medium => {
  
        :geometry => "640x480",
  
        :format => 'mp4'
  
      },
  
      :thumb => { :geometry => "160x120", :format => 'jpeg', :time => 10} 
  
    },# hello 123
  
    :processors => [:transcoder],
  
    :google_drive_options => {
  
      :path => proc { |style| "#{style}_#{id}_#{image.original_filename}" },
  
      :public_folder_id => '0B0VNyOkzIwUZZFFGeVhycFk0dnc'
  
    }
  
  end

  in Gemfile

  gem 'google-api-client'
  
  gem 'paperclip'
  
  gem 'paperclip-googledrive'
  
  gem 'paperclip-av-transcoder'
  
  gem "paperclip-ffmpeg"

  in controller

  def create
  
      if params[:videos]
  
        params[:videos].each { |video| Video.create(video: video) }
  
      end
  
  end

  when i run , this display error

  [AV] Running command : if command -v avprobe 2>/dev/null ; then echo "true" ; else echo "false" ; fi
  [AV] Running command : if command -v ffmpeg 2>/dev/null ; then echo "true" ; else echo "false" ; fi
  Av::UnableToDetect in AlbumsController#create
  Unable to detect any supported library

  pls. how to fix this errors

• Trying to get property of non-object while uploading to database

  26 novembre 2017, par Programmmereg

  I have a script when user can clip video, then that video uploads to public folder, and now I want to upload all video data to database. But i get error like in title. Here’s my code :

  Controller :

  public function clip($id)
  
      {
  
          $video = Video::where('id', $id)->first();
  
  
  
          $oldId = $video->id;
  
          $originalName = $video->original_name;
  
          $newName = str_random(50) . '.' . 'mp4';
  
  
  
          FFMpeg::fromDisk('public')
  
          ->open('/uploads/videos/' .$video->file_name)
  
          ->addFilter(function ($filters) {
  
          $filters->clip(FFMpeg\Coordinate\TimeCode::fromSeconds(5), FFMpeg\Coordinate\TimeCode::fromSeconds(2));
  
          })
  
          ->export()
  
          ->toDisk('public')
  
          ->inFormat(new \FFMpeg\Format\Video\X264)
  
          ->save('/uploads/videos/' . $newName);
  
  
  
  
  
  
  
          $data = ['user_id'=>Auth::user()->id,
  
              'file_name'=>$newName,
  
              'original_name'=> $originalName,
  
              'old_id' => $oldId,
  
          ];
  
  
  
           $video = Video::edit($data);
  
      }

  Model :

  public static function edit($request)
  
      {
  
          $video = new Video;
  
          $video->user_id = $request->user_id;
  
          $video->file_name = $request->file_name;
  
          $video->original_name = $request->original_name;
  
          $video->save();
  
  
  
          $old = $file = Video::where('id', $request->old_id)->delete();
  
          //$old_file = unlink($request->file('file'));
  
  
  
          return $video;
  
      }

  What should I edit ?