Undocumented in source.
Extra delay added to base_time to compensate for computing delays when setting elements to PLAYING.
The fixed clock of the pipeline, used when GST_PIPELINE_FLAG_FIXED_CLOCK is set.
The stream time of the pipeline. A better name for this property would be the running_time, the total time spent in the PLAYING state without being flushed. (deprecated, use the start_time on GstElement).