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Force aspect ratio from XML manifest - XML manifest that defines all media asset files and comes with the media asset contains different setting than the aspect ratio extracted from the video track metadata, the XML setting is preferred.

Reference frames - Set set reference frames to consider for motion compensation.


  • fast - a good balance between speed and quality (default). 
  • slow - a much slower but more accurate B-frame decision mode that correctly detects fades and generally gives considerably better quality.