Create a new duration changed message. This message is posted by elements
that know the duration of a stream when the duration changes. This message
is received by bins and is used to calculate the total duration of a
pipeline. Elements may post a duration message with a duration of
GST_CLOCK_TIME_NONE to indicate that the duration has changed and the
cached duration should be discarded. The new duration can then be
retrieved via a query.
Create a new duration changed message. This message is posted by elements that know the duration of a stream when the duration changes. This message is received by bins and is used to calculate the total duration of a pipeline. Elements may post a duration message with a duration of GST_CLOCK_TIME_NONE to indicate that the duration has changed and the cached duration should be discarded. The new duration can then be retrieved via a query.