[Mlt-devel] [PATCH] Affine keyframable offset

[j-b-m <j-...@us...>]

Hello!


Attached patch adds keyframable offset to the affine transition, especially 
useful in Kdenlive for the affine filter used in keyframable rotation so that you 
can define rotation and offset easily.


regards
jb

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diff --git a/src/modules/plus/transition_affine.c 
b/src/modules/plus/transition_affine.c
index 3616e18..133fe62 100644
--- a/src/modules/plus/transition_affine.c
+++ b/src/modules/plus/transition_affine.c
@@ -347,11 +347,14 @@ static inline void get_affine( affine_t *affine, 
mlt_transition this, float posi
                float shear_x = composite_calculate_key( this, "shear_x", 
"shear_x_info", 360, position );
                float shear_y = composite_calculate_key( this, "shear_y", 
"shear_y_info", 360, position );
                float shear_z = composite_calculate_key( this, "shear_z", 
"shear_z_info", 360, position );
-
+               float o_x = composite_calculate_key( this, "ox", "ox_info", 0, 
position );
+               float o_y = composite_calculate_key( this, "oy", "oy_info", 0, 
position );
+               
                affine_rotate_x( affine->matrix, rotate_x );
                affine_rotate_y( affine->matrix, rotate_y );
                affine_rotate_z( affine->matrix, rotate_z );
                affine_shear( affine->matrix, shear_x, shear_y, shear_z );
+               affine_offset( affine->matrix, o_x, o_y );
        }
 }