Video Capture + CameraController

[aaron acosta]

Hi, I followed Donovan's tutorial using the CameraController pathway because it already has zoom, focus, WYSIWYG..etc, I am now trying to integrate VideoCapture (I believe it's still experimental?) .I only found examples for video on "Migrating camera1 to camerax' guide, I am getting errors about OnVideoSavedCallback being unresolved and others..  I would like to know If my code is outdated? I can't get it to work. Thanks!

class MainActivity : AppCompatActivity() {
    private lateinit var viewBinding: ActivityMainBinding

    //If using CameraController
    private lateinit var cameraController: LifecycleCameraController





    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        viewBinding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(viewBinding.root)

        if(!hasPermissions(baseContext)) {
            //Request camera-related permissions
            activityResultLauncher.launch(REQUIRED_PERMISSIONS)
        }else{
            startCamera()
        }
        // Set up the listeners for take photo and video capture buttons
        viewBinding.imageCaptureButton.setOnClickListener { takePhoto()}
        viewBinding.videoCaptureButton.setOnClickListener { startStopVideo()}


    }

    private fun startCamera(){
        val previewView: PreviewView = viewBinding.viewFinder

        cameraController = LifecycleCameraController(baseContext)

        cameraController.setEnabledUseCases(VIDEO_CAPTURE)
        cameraController.bindToLifecycle(this)
        cameraController.cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA


        previewView.controller = cameraController

    }



     //Define a VideoSaveCallback class for handling success and error states.
    class VideoSaveCallback : OnVideoSavedCallback {
        override fun onVideoSaved(outputFileResults: OutputFileResults) {
            val msg = "Video capture succeeded: ${outputFileResults.savedUri}"
            Toast.makeText(baseContext, msg, Toast.LENGTH_SHORT).show()
            Log.d(TAG, msg)
        }

        override fun onError(videoCaptureError: Int, message: String,
                             cause: Throwable?) {
            Log.d(TAG, "error saving video: $message", cause)
        }
    }

    private fun startStopVideo() {
        if (cameraController.isRecording()) {
            // Stop the current recording session.
            cameraController.stopRecording()
            return
        }

        // Define the File options for saving the video.
        val name = SimpleDateFormat(FILENAME_FORMAT, Locale.US)
            .format(System.currentTimeMillis())

        val outputFileOptions = OutputFileOptions
            .Builder(File(this.filesDir, name))
            .build()

        // Call startRecording on the CameraController.
        cameraController.startRecording(
            outputFileOptions,AudioConfig.AUDIO_DISABLED,
            ContextCompat.getMainExecutor(this),
            VideoSaveCallback()
        )
    }



    private fun takePhoto(){
        // Create time stamped name and MediaStore entry.
        val name = SimpleDateFormat(FILENAME_FORMAT, Locale.US)
            .format(System.currentTimeMillis())
        val contentValues = ContentValues().apply {
            put(MediaStore.MediaColumns.DISPLAY_NAME, name)
            put(MediaStore.MediaColumns.MIME_TYPE, "image/jpeg")
            if(Build.VERSION.SDK_INT > Build.VERSION_CODES.P){
                put(MediaStore.Images.Media.RELATIVE_PATH, "Pictures/BAM2-Image")
            }
        }

        //Create output options object which contains file + metadata
        val outputOptions = ImageCapture.OutputFileOptions
            .Builder(contentResolver,
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                contentValues)
            .build()

        //Set up image capture listener, which is triggered after photo has
        //been taken

        cameraController.takePicture(
            outputOptions,
            ContextCompat.getMainExecutor(this),
            object : ImageCapture.OnImageSavedCallback{
                override fun onError(exc: ImageCaptureException) {
                    Log.e(TAG, "Photo capture failed: ${exc.message}", exc)
                }

                override fun onImageSaved(output: ImageCapture.OutputFileResults) {
                    val msg = "Photo capture succeeded: ${output.savedUri}"
                    Toast.makeText(baseContext, msg, Toast.LENGTH_SHORT).show()
                    Log.d(TAG,msg)

                }
            }
        )
    }

[Xi Zhang (张熹)]

Hi Aaron:

Which version of CameraX are you using? In the latest 1.3.0-beta01, CameraController supports video capture. You can check out CameraX test app for code sample: https://github.com/androidx/androidx/blob/c3618a178cb09b43ed803bb98f2b2e5903e86e80/camera/integration-tests/viewtestapp/src/main/java/androidx/camera/integration/view/CameraControllerFragment.java#L283

Thanks,

Xi

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[aaron acosta]

Thanks, works like a charm! 

How can we switch between aspect ratios with CameraController? 16/9 or 4/3

Thanks!

[Xi Zhang (张熹)]

For the camera controller, the result is WYSIWYG. If you set PreviewView's aspect ratio to 16/9 or 4/3, I believe the output will be adjusted accordingly. It supports arbitrary aspect ratio too. Please let me know if that's not the case.