track-element: clamp interpolated keyframe values.

diff --git a/ges/ges-track-element.c b/ges/ges-track-element.c
index ee3ba4c..2f923a6 100644 (file)
--- a/ges/ges-track-element.c
+++ b/ges/ges-track-element.c
@@ -302,6 +302,8 @@ interpolate_values_for_position (GstTimedValue * first_value,
         first_value->value - ((float) (first_value->timestamp -
             position) / (float) interval) * diff;
 
+  value_at_pos = CLAMP (value_at_pos, 0.0, 1.0);
+
   return value_at_pos;
 }