* (no speed factor applied, only available when \em _need_previous_next is set on the producer)
* \properties \em next \em frame a reference to the unfiltered following frame
* (no speed factor applied, only available when \em _need_previous_next is set on the producer)
+ * \properties \em colorspace the standard for luma coefficients
+ * \properties \em force_full_luma luma range handling, set to -1 for pass-through, 1 for full range, 0 for scaling
*/
struct mlt_frame_s