iOS video capture API for both Swift and Objective-C
Some common high-level objects used with this API:
- AVCaptureDevice
- AVCaptureSession
- AVCaptureVideoPreviewLayer
related tags: avfoundation swift ios avcapturesession
Questions tagged [avcapture]
223 questions
5
votes
2 answers
AVFoundation I use setActiveVideoMinFrameDuration didn't work
I use AVCaptureVideoDataOutput in my demo ,for take photos in loop (like scanner) without sound,
so i set fps to low Level
[device setActiveVideoMinFrameDuration:CMTimeMake(1, 1)];
[device setActiveVideoMaxFrameDuration:CMTimeMake(1, 1)];
In my…
Zy Zhao
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5
votes
0 answers
Landscape mode with AVCaptureVideoPreviewLayer
I'm trying to use AVCaptureVideoPreviewLayer to get the camera to display in landscape mode, but no matter what I do, the camera always shows up on only half of the screen in landscape mode.
I have it so my app only supports Landscape Right, and…
ryanthon
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5
votes
1 answer
How do i save a video (mp4 format) using AVCaptureVideoDataOutput?
I have set up the input, and the output for the AVCapture session and also the delegate
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
is…
MaheshShanbhag
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5
votes
2 answers
Why does jpegStillImageNSDataRepresentation throw an exception when sample buffer is NOT null?
In iOS, I am using code to capture from AVCaptureStillImageOutput thus:
[_captureStillOutput captureStillImageAsynchronouslyFromConnection: _captureConnection
completionHandler:…
Tom Pace
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4
votes
1 answer
AVCapture loses ability to set focus when using ZBar SDK
This has been stumping me for days...
In my app i am using AVCapture to take a photo, then i am using the ZBar SDK to scan a bar code. The problem is once I load ZBar after taking a picture, i lose the ability to auto focus when taking another…
AlBeebe
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4
votes
2 answers
Proper way to optimize my AVCaptureSession?
I got my AVCaptureSession to work and it duplicates the Camera.app UI almost perfectly, however, after a few seconds the application will crash and I just cannot find what I'm doing wrong. I really hope someone knows how to optimize this!
I AM using…
Raphael Caixeta
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4
votes
2 answers
iOS 5 - AVCaptureDevice setting focus point and focus mode freezes the live camera picture
I'm using the following method to set point of focus since iOS 4:
- (void) focusAtPoint:(CGPoint)point
{
AVCaptureDevice *device = [[self captureInput] device];
NSError *error;
if ([device…
user1016934
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4
votes
1 answer
How to record video to screen on a landscape app?
This is doing my head in.
I am working from this sample project: https://github.com/jj0b/AROverlayExample
This works perfectly. only problem is it is a portrait app. So when I rotate the device to landscape, the video still displays as wanted,…
P i
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4
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1 answer
Appropriately Release Buffers From AVCaptureDataOutputSynchronizerDelegate Due to Out Of Buffers
I am using AVCaptureDataOutputSynchronizerDelegate to handle capturing data for video, depth and metadata
private let videoDataOutput = AVCaptureVideoDataOutput()
private let depthDataOutput = AVCaptureDepthDataOutput()
private let…
impression7vx
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4
votes
1 answer
Why does autoFocusRangeRestriction have no effect?
You can tell the iPhone camera to focus on near or far objects by doing:
try! device.lockForConfiguration()
defer { device.unlockForConfiguration() }
device.autoFocusRangeRestriction = .near
But whether I set near, far or leave it unset makes…
Kartick Vaddadi
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4
votes
1 answer
How to Use Obsoleted Syntax of Swift 3 in Swift 4
To record video, while setting video codec as below:
sessionOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecTypeJPEG]
XCode says 'AVVideoCodecTypeJPEG' has been renamed to 'AVVideoCodecType.jpeg' and 'AVVideoCodecTypeJPEG' was obsoleted in…
rick
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4
votes
2 answers
AVCaptureDevice isFlashModeSupported deprecated iOS 10
I am using AVCaptureDevice's instance method "isFlashModeSupported" as below:
NSArray *captureDeviceType = @[AVCaptureDeviceTypeBuiltInWideAngleCamera,AVCaptureDeviceTypeBuiltInMicrophone];
AVCaptureDeviceDiscoverySession *captureDevice =…
Tejas Bharambe
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4
votes
1 answer
How do I record a video on iOS without using a preset?
The simpler way to record a video on iOS is by setting a AVCaptureSession.sessionPreset.
But that doesn't work for me since I want to control parameters like binning, stabilization (cinematic, standard, or none) and ISO.
I find the format I want and…
Kartick Vaddadi
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4
votes
0 answers
how to crop a AVCaptureVideoPreviewLayer in a shape of square in Swift?
I am using AVCaptureVideoPreviewLayer to make a camera application. For some reason, I need to use just a part of the screen capturing in a square shape to show a display output. It is something similar to the early question: Cropping…
Ares Li
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AVCaptureVideoPreviewLayer and OpenCV
I have a problem in displaying result onto the preivewLayer using iOS SDK. I would need a little advice from you in understanding how to "substitute" the captured frame with the processed one.
The fact is: I have a very standard AVCapture…
Altair Jones
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