I am attempting to create multiple, serial writing sessions with AVAssetWriter. Once I've completed one successfully (after calling finishWriting) the status is set to 2 (AVAssetWriterStatusCompleted).
Trying to create another session, I call startWriting, but I get the error:
[AVAssetWriter startWriting] cannot call method when status is 2
Seems I cannot create a writing session unless I configure something. Do I have to recreate the AVAssetWriter again? I must be missing something, and the docs aren't helping.
Thanks.
After the writer has completed it is no longer usable. You must create a new one. From the docs:
You can only use a given instance of AVAssetWriter once to write to a single file. If you want to write to files multiple times, you must use a new instance of AVAssetWriter each time.
I have an app where I use two AVAssetWriters. I create two writers where only one is active at a time. When some time delta is reached I push the active writer onto a GCD queue for completion and recreation, and set the active writer pointer to the other writer.
if(time > delta)
dispatch( ^{ finish writer, create new one })
active_writer = next writer
This works well when using a capture queue. You can setup a switch to perform the operations given the state of the writer.
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