Google Flix Engine Linux Reference Manual - Manual (Page 95)

5.22 Brightness/Contrast/Hue/Saturation 89
5.22.3.10 on2sc editor_options_SetContrast (FLIX2HANDLE flix, const double contrast)
Set the contrast adjustment factor.
Determines the level by which to adjust the contrast. Contrast is adjusted on a scale of -255 to 255, with 0
indicating no change. To increase the relative contrast of the video, use a positive number. To decrease the
relative contrast of the video, use a negative number.
Parameters:
← flix Handle to the Flix Engine returned from Flix2_Create() or Flix2_CreateEx()
← contrast Contrast Factor (-255 to 255)
Return values:
ON2_OK The contrast value was successfully set in the engine.
ON2_INVALID_PARAMS The value is out of range.
ON2_NET_ERROR The underlying communication layer failed.
Note:
This call will have no effect on the encoded video unless the contrast filter is enabled with editor_-
options_SetUseContrast() . The default value is 1.
Deprecated
Use the Filter Interface along with FE2_FILTER_BCHS and the FE2_BCHS_CONTRAST parameter.
This function will be removed in a future release.
5.22.3.11 on2sc editor_options_SetHue (FLIX2HANDLE flix, const int32_t hue)
Set the hue adjustment factor.
Determines the level by which to adjust the hue. Hue is adjusted on a scale of -180 to 180, with 0 indicating
no change. To adjust the hue of the video towards red, use a negative number. To adjust the hue of the
video towards green, use a positive number.
Parameters:
← flix Handle to the Flix Engine returned from Flix2_Create() or Flix2_CreateEx()
← hue Hue Factor (-180 to 180)
Return values:
ON2_OK The hue value was successfully set in the engine.
ON2_INVALID_PARAMS The value is out of range.
ON2_NET_ERROR The underlying communication layer failed.
Note:
This call will have no effect on the encoded video unless the hue filter is enabled with editor_options_-
SetUseHue() . The default value is 0.
Deprecated
Use the Filter Interface along with FE2_FILTER_BCHS and the FE2_BCHS_HUE parameter. This
function will be removed in a future release.
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