avfoundation

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Error recording to movie file with AVFoundation

This is a strange problem.I have not changed any code involving this in my project but my video recording has randomly sto开发者_StackOverflowpped working.When I try to save to a movie to a file I get[详细]

2023-04-07 19:24 分类：问答
Playing sound using AVAssetReader

I am using AVAssetReader to get the individual frames from a video file (see code below). I would like to know how I can play the audio from the video at the same time.[详细]

2023-04-07 14:39 分类：问答
AVFoundation Issue With Core Animation on Mac OS X 10.7 Lion

With Mac OS X 10.7 Apple has introduced AVFoundation and I\'m trying to generate a simple quick time movie containing an animated shape. The problem is that the core animation does not render and I en[详细]

2023-04-07 12:35 分类：问答
Face Detection on Camera video input on iPhone

I am working o开发者_高级运维n a project that needs to do face detection on a camera video input (like security camera).[详细]

2023-04-07 10:35 分类：问答
iPhone Detect Volume Keys press.

I need to detect when the user presses the hardware volume keys, (App Store safe approach) I have tried a number of things with no luck. Do you know how to implement such functionality? At present I a[详细]

2023-04-06 18:44 分类：问答
Fast switching between videos using AVFoundation

I\'m writing an application where the user can record up to 6 video clips each with a duration of 2 seconds. When the video clips are recorded the user can play with them using 6 buttons - one for eac[详细]

2023-04-04 20:00 分类：问答
can't access audio file after converting it

Ive been using the following code to convert aac / mp3 files into pcm. The code works fine. But right after the convert ion is done if I try to play that file or do anything with it using AVAudioPlaye[详细]

2023-04-04 14:32 分类：问答
AVAssetWriterInput crash

I am recording a trailing buffer of video.At 15 second intervals, I am creating a new instance of AVAssetWriter, and adding my instance of AVAssetWriterInput as an input.I am grabbing frames using AVC[详细]

2023-04-04 13:50 分类：问答
iOS5 AVFoundation image to video

I\'m trying to create a video from a single image, and save it to my photos library, I\'ve been googling around for ages - and cannot find a solution.[详细]

2023-04-04 03:20 分类：问答
Sample buffer in AVCaptureVideoDataOutput

I\'m thinking in an application that i want to take the sampleBuffer from a capture output and process it to become a stream broadcast on a web server I\'ve been doing Goggling since two months and I\[详细]

2023-04-03 16:32 分类：问答