7.0.0-beta.12

Breaking Changes:

• The display_aspect_ratio and sample_aspect_ratio methods have been renamed to
  raw_display_aspect_ratio and raw_sample_aspect_ratio respectively on both
  the Media and Stream classes.
• The calculated_aspect_ratio and calculated_pixel_aspect_ratio methods have been
  renamed to display_aspect_ratio and sample_aspect_ratio respectively on both
  the Media and Stream classes.
• Rolled back zlib scale changes (they caused more errors than what they resolved).

Improvements:

• Added more getters for color information to the Media class.
• Added more options to the scale filter.
• Greatly simplified the MPEG-DASH H.264 preset.
• Added support for stream specifiers in many RawCommandArgs methods.