
Uncommenting Track elements related to BlockAdditional and adding the new AlphaMode element as specified in the matroska spec here: http://matroska.org/technical/specs/index.html#AlphaMode Change-Id: I87895931e8885e4832efa74776ab1bea91a634e2
Uncommenting Track elements related to BlockAdditional and adding the new AlphaMode element as specified in the matroska spec here: http://matroska.org/technical/specs/index.html#AlphaMode Change-Id: I87895931e8885e4832efa74776ab1bea91a634e2