preferredMediaChunkDuration
The maximum duration to use for each chunk of sample data written to the file for file types that support media chunk duration.
Declaration
var preferredMediaChunkDuration: CMTime { get set }Discussion
The total duration of the samples in a chunk can be no greater than the preferred chunk duration, or the duration of a single sample if the single sample’s duration is greater than the preferred chunk duration. The default media chunk duration is 1.0 second. Setting a negative or non-numeric value for the chunk duration will cause an error.