BaseTransform.reconfigure

Negotiates src pad caps with downstream elements if the source pad is marked as needing reconfiguring. Unmarks GST_PAD_FLAG_NEED_RECONFIGURE in any case. But marks it again if negotiation fails.

Do not call this in the #GstBaseTransformClass::transform or #GstBaseTransformClass::transform_ip vmethod. Call this in #GstBaseTransformClass::submit_input_buffer, #GstBaseTransformClass::prepare_output_buffer or in #GstBaseTransformClass::generate_output _before_ any output buffer is allocated.

It will be default be called when handling an ALLOCATION query or at the very beginning of the default #GstBaseTransformClass::submit_input_buffer implementation.