Saving filtered movie GPUImage 2 - swift

Question

I'm having trouble saving the filtered video to disk with GPUImage 2. I've added a filter successfully and now i need to save that video to disk, which is where i'm running into issues. There is more answers regarding this subject with GPUImage 1 but i'm not able to get them to work with GPUImage 2
The filtering:
let bundleURL = Bundle.main.resourceURL!
let movieURL = URL(string: "test.mov", relativeTo: bundleURL)
do {
movie = try MovieInput(url: movieURL!, playAtActualSpeed: true)
filter = HueAdjustment()
filter.hue = hue
movie --> filter --> renderView
movie.runBenchmark = true
movie.start()
} catch {
print("Couldn't process movie error: \(error)")
}
Trying to save it based on the sampleLiveRecording which doesn't seem to suit a filtered movie.
{
do {
let documentsDir = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
let fileURL = URL(string: "testRender.mov", relativeTo: documentsDir)!
do {
try FileManager.default.removeItem(at: fileURL)
} catch {}
movieOutput = try MovieOutput(URL: fileURL, size: Size(width: 448, height: 426), liveVideo: false)
filter --> movieOutput!
movieOutput!.startRecording()
} catch {
fatalError("Couldn't Initialize Movie: \(error)")
}
}
Update: I didn't find an answer but I reverted to using GPUImage 1.

Answer 1

In my practice i've used this class for output video to file.
private class FileOutput {
enum State: Int {
case created
case recording
case finishing
}
var state: State = .created
let writingQueue = DispatchQueue(label: "FileOutputQueue", attributes: [])
var fileURI: URL
var duration: Double {
return fileOutput.recordDuration
}
var didFinishWriting: ( () -> () )? = nil
fileprivate let fileOutput: MovieOutput
init( camera: Camera, fileURI: URL ) throws {
do {
self.fileURI = fileURI
fileOutput = try MovieOutput(URL: fileURI,
size: Size(width: 1080, height: 1920),
liveVideo: true)
let movieOutputFilter = BasicOperation()
movieOutputFilter.overriddenOutputRotation = .rotate180
camera --> movieOutputFilter --> fileOutput
} catch {
throw NSError(domain: "com.test.camera", code: 1200000, userInfo: nil)
}
}
func start() {
if state == .created {
state = .recording
let _ = writingQueue.sync {
self.fileOutput.startRecording()
}
}
}
func finish() {
if state == .recording {
state = .finishing
let _ = writingQueue.sync {
self.fileOutput.finishRecording {
[weak self] in
self?.didFinishWriting?()
self?.didFinishWriting = nil
}
}
}
}
deinit {
didFinishWriting = nil
print("FileOutput deinited")
}
}