Instructs the receiver to invoke a client-supplied block whenever a new pass has begun.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
The queue on which the block should be invoked.
The block the receiver should invoke whenever a new pass has begun.
A typical block passed to this method will perform the following steps:
Query the value of the receiver's
currentproperty and reconfigure the source of media data, for example, the AVAssetReader instance, accordingly.
requestto begin appending data for the current pass.
Media Data When Ready On Queue: using Block:
When all media data has been appended for the current request, invoke
mark to begin the process of determining whether an additional pass is warranted. If an additional pass is warranted, the block passed to this method will be invoked to begin the next pass. If no additional passes are needed, the block passed to this method will be invoked one final time so the client can invoke
mark in response to the value of