The ID passed is malformed
The formatted files was malformed
The frame number is invalid
The operation would break one of the overlap conditions for the #GESTimeline. (Since: 1.18)
The operation would lead to a negative #GES_TIMELINE_ELEMENT_LAYER_PRIORITY. (Since: 1.18)
The operation would lead to a negative time. E.g. for the #GESTimelineElement:start #GESTimelineElement:duration or #GESTimelineElement:in-point. (Since: 1.18)
Some #GESTimelineElement does not have a large enough #GESTimelineElement:max-duration to cover the desired operation. (Since: 1.18)
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