Add the movieFragmentInterval value to the recording feature.

[shogo4405]

Description & motivation

• It possible to specify the movieFragmentInterval to recover from crashes or unintended task termination.

Type of change

• New feature (non-breaking change which adds functionality)

Screenshots:

[mkrn]

Thank you for adding this!
I'm looking at the documentation
https://developer.apple.com/documentation/avfoundation/avcapturemoviefileoutput/1387146-moviefragmentinterval
and it looks like it is 10s by default.. but the files are still sometimes unusable with crash.. was this feature disabled before?

[shogo4405]

I have never implemented this before, so it will be a new implementation.

There are APIs using iOS that include AVAssetWriter and AVCaptureMovieFileOutput. HaishinKit uses AVAssetWriter.

In the case of AVAssetWriter, the default value for this is set to invalid.
https://developer.apple.com/documentation/avfoundation/avassetwriter/1387469-moviefragmentinterval

[shogo4405]

I see, so it's unstable when it crashes. I was testing with Task Kill.
It seems like further research is needed, but for now, I believe this is the right specification and it will improve from here. I'll merge it for the time being.

[mkrn]

Thank you this worked! It could be even 10.0s by default
Thank you for pointing out that it was invalid in AVAssetWriter.