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• How to create watermark underlined text using ffmpeg

  31 décembre 2019, par Apoorv Srivastava

  I am trying to create a watermark with underlined text, but I am not able to find drawtext filter for underlined text.

  Here is my command :

  ffmpeg -i ./public/uploads/videos/1577703125107.mp4 -vf "[in]drawtext=fontfile= ./public/fonts/Arial/arial.ttf: text=my watermark text: fontcolor=#000000: fontsize=20: x=23:y=68 [out]" ./public/uploads/videos/1577703128790.mp4

  How can I underline text ?

• Add more parameters to function with declared parameter

  27 novembre 2017, par Programmmereg

  I want to add two variable in addFilter() function. But the problem is that this method allows only one parameter to get. How to extend it ?

  FMpeg::fromDisk('public')
  
          ->open('/uploads/videos/' .$video->file_name)
  
          ->addFilter(function($filters) {
  
              $filters->clip(FFMpeg\Coordinate\TimeCode::fromSeconds($start), FFMpeg\Coordinate\TimeCode::fromSeconds($duration));
  
          })
  
          ->export()
  
          ->toDisk('public')

  definition of code : I can’t change this

  public function addFilter(FilterInterface $filter)
  
      {
  
          $this->filters->add($filter);
  
  
  
          return $this;
  
      }

• extracting single frame from MediaElemet or FFmpegInterop

  13 janvier 2016, par Jakub Wisniewski

  I am writing app (Windows Phone 8.1 Store App) that allows user to connect to IP Camera. I am using FFmpeg Interop library for ffmpeg which allows me to play eg. rtsp streams in media element. I need now a way to somehow extract a single frame from stream or from media element.

  I have tested other application wchih allows connecting to IP cameras - IP Centcom, and they have working snapshots only for mjpeg streams as far as I now (they were not working for rtsp). Becouse of that I belive that it is impossible or at very least very hard to export frame from media element.

  I have different question - if anyone has ever used FFmpeg Interop and would like to help/explain me how could I modify/extend FFmpegInteropMSS to add method called ’GetThumbnailForStream’ that would work similary to ’GetMediaStreamSource’ but would return single frame (bitmap or jpg) instead of MediaStreamSource ?

  Every help would be appreciated

  EDIT :

  I have found something ;

  in MediaSampleProvider in method WriteAVPacketToStream (line 123) there is line

  auto aBuffer = ref new Platform::Array(avPacket->data, avPacket->size);

  and I belive that this is the place that stores single frame data that is needed to convert into bitmap - now since I do not know c++ too much I have a question : how can I convert it into a form that I could return via public method ?

  When returning :

  Platform::Array^

  I get

  ’FFmpegInterop::MediaSampleProvider’ : a non-value type cannot have any public data members

  EDIT2 :

  Ok I am doing approprate projection to byte according to this microsoft information, now I need to check if this is correct data.