21 January 2015

Field Name	Description	Allowed Values	Default Values
audio_sync	It adjusts the audio stream to match the timestamps, in # of samples per second. 1 is special value that means automatic.	positive integer or auto if you want us to handle audio synchronization issues	None

Field Name	Description	Allowed Values	Default Values
slices	Number of slices, used in parallelized encoding.	Positive integer	None

Field Name	Description	Allowed Values	Default Values
gravity	Sets the current gravity suggestion for various other options	northwest, north, northeast, west, center, east, southwest, south, southeast	None
shave	Shave pixels from the image edges	WxH	None
unsharp_radius	The radius of the Gaussian	In pixels, not counting the center pixel, should be larger than unsharp_sigma. Use a radius of 0 to have the method select a suitable radius.	None
unsharp_sigma	The standard deviation of the Gaussian	In pixels	1.0
unsharp_gain	The fraction of the difference between the original and the blur image that is added back into the original	Float	1.0
unsharp_threshold	The threshold, as a fraction of QuantumRange, needed to apply the difference amount	Float	0.05