使用UIImagePickerController 进行录制
#import "ViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>
#import <QuartzCore/QuartzCore.h>
@interface ViewController ()
<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
- (IBAction)videoRecod:(id)sender;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)videoRecod:(id)sender {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.delegate = self;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.mediaTypes = [[NSArray alloc]
initWithObjects:(NSString *)kUTTypeMovie, nil];
//录制质量设定
imagePickerController.videoQuality = UIImagePickerControllerQualityTypeHigh;
//只允许最多录制30秒时间
imagePickerController.videoMaximumDuration = 30.0f;
[self presentViewController:imagePickerController animated:YES completion:nil];
} else {
NSLog(@"摄像头不可用。");
}
}
- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker {
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void) imagePickerController: (UIImagePickerController *) picker
didFinishPickingMediaWithInfo: (NSDictionary *) info {
NSURL *url = [info objectForKey:UIImagePickerControllerMediaURL];
NSString *tempFilePath = [url path];
if ( UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(tempFilePath) ) {
//video:didFinishSavingWithError:contextInfo: 必须保存成这类回调
UISaveVideoAtPathToSavedPhotosAlbum( tempFilePath,
self,
@selector(video:didFinishSavingWithError:contextInfo:),
(__bridge void *)(tempFilePath));
}
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(NSString *)contextInfo {
NSString *title; NSString *message;
if (!error) {
title = @"视频保存";
message = @"视频已经保存到设备的相机胶卷中";
} else {
title = @"视频失败";
message = [error description];
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title
message:message
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
- (void)navigationController:(UINavigationController *)navigationController
willShowViewController:(UIViewController *)viewController
animated:(BOOL)animated
{
NSLog(@"选择器将要显示。");
}
- (void)navigationController:(UINavigationController *)navigationController
didShowViewController:(UIViewController *)viewController
animated:(BOOL)animated
{
NSLog(@"选择器显示结束。");
}
AVCaptureSession,捕获会话,是为了实现从摄像头和麦克风捕获数据,需要使用AVCaptureSession对象协调输入输出数据
AVCaptureDevice,捕获设备,代表输入一个设备,例如摄像头和麦克风
AVCaptureDeviceInput,捕获会话的一个输入数据源
AVCaptureOutput,捕获会话的一个输出目标,例如输出的视频文件和静态图片
AVCaptureMovieFileOutput,是AVCaptureOutput的子类,通过它可以将捕获的数据输出到QuickTime视频文件中(MOV)
AVCaptureVideoPreviewLayer,是CALayer子类,可以使用它来显示录制的视频
AVCaptureConnection,捕获连接,在一个捕获会话中输入和输出之间的连接
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <AssetsLibrary/AssetsLibrary.h>
@interface ViewController ()
<AVCaptureFileOutputRecordingDelegate>
{
BOOL isRecording;
}
@property (weak, nonatomic) IBOutlet UILabel *label;
@property (weak, nonatomic) IBOutlet UIButton *button;
@property (strong, nonatomic) AVCaptureSession *session;
@property (strong, nonatomic) AVCaptureMovieFileOutput *output;
- (IBAction)recordPressed:(id)sender;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.session = [[AVCaptureSession alloc] init];
self.session.sessionPreset = AVCaptureSessionPresetMedium;
AVCaptureDevice *cameraDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *camera = [AVCaptureDeviceInput deviceInputWithDevice:cameraDevice error:&error];
AVCaptureDevice *micDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
AVCaptureDeviceInput *mic = [AVCaptureDeviceInput deviceInputWithDevice:micDevice error:&error];
if (error || !camera || !mic) {
NSLog(@"Input Error");
} else {
//加入捕获音频视频
[self.session addInput:camera];
[self.session addInput:mic];
}
self.output = [[AVCaptureMovieFileOutput alloc] init];
if ([self.session canAddOutput:self.output]) {
[self.session addOutput:self.output];//输出
}
AVCaptureVideoPreviewLayer *previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:self.session];
previewLayer.frame = CGRectMake(0,0, self.view.frame.size.width, self.view.frame.size.height);
[self.view.layer insertSublayer:previewLayer atIndex:0];
[self.session startRunning];
isRecording = NO;
self.label.text = @"";
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if (![self.session isRunning])
{
[self.session startRunning];
}
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
if ([self.session isRunning])
{
[self.session stopRunning];
}
}
- (IBAction)recordPressed:(id)sender {
if (!isRecording)
{
[self.button setTitle:@"停止" forState:UIControlStateNormal];
self.label.text = @"录制中...";
isRecording = YES;
NSURL *fileURL = [self fileURL];
[self.output startRecordingToOutputFileURL:fileURL recordingDelegate:self];
}
else
{
[self.button setTitle:@"录制" forState:UIControlStateNormal];
self.label.text = @"停止";
[self.output stopRecording];
isRecording = NO;
}
}
- (NSURL *) fileURL
{
NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"movie.mov"];
NSURL *outputURL = [[NSURL alloc] initFileURLWithPath:outputPath];
NSFileManager *manager = [[NSFileManager alloc] init];
if ([manager fileExistsAtPath:outputPath])
{
[manager removeItemAtPath:outputPath error:nil];
}
return outputURL;
}
#pragma mark-- AVCaptureFileOutputRecordingDelegate委托协议实现方法
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput
didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
fromConnections:(NSArray *)connections error:(NSError *)error
{
if (error == nil) {
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:outputFileURL
completionBlock:^(NSURL *assetURL, NSError *error)
{
if (error)
{
NSLog(@"写入错误。") ;
}
}];
}
}
使用UIVideoEditorController
#import "ViewController.h"
@interface ViewController ()
<UIVideoEditorControllerDelegate,UINavigationControllerDelegate>
- (IBAction)editButtonPress:(id)sender;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)editButtonPress:(id)sender {
NSBundle *bundle = [NSBundle mainBundle];
NSString *moviePath = [bundle pathForResource:@"YY"
ofType:@"mp4"];
//判断设备是否支持编辑视频
if ([UIVideoEditorController canEditVideoAtPath:moviePath]){
UIVideoEditorController *videoEditor =
[[UIVideoEditorController alloc] init];
videoEditor.delegate = self;
videoEditor.videoPath = moviePath;
[self presentViewController:videoEditor animated:YES completion:NULL];
} else {
NSLog(@"不能编辑这个视频");
}
}
- (void)videoEditorController:(UIVideoEditorController *)editor
didSaveEditedVideoToPath:(NSString *)editedVideoPath{
[editor dismissViewControllerAnimated:YES completion:NULL];
if ( UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(editedVideoPath) ) {
UISaveVideoAtPathToSavedPhotosAlbum(editedVideoPath, self,
@selector(video:didFinishSavingWithError:contextInfo:),
(__bridge void *)(editedVideoPath));
}
}
- (void)videoEditorController:(UIVideoEditorController *)editor
didFailWithError:(NSError *)error{
NSLog(@"编辑视频出错");
NSLog(@"Video editor error occurred = %@", error);
[editor dismissViewControllerAnimated:YES completion:NULL];
}
- (void)videoEditorControllerDidCancel:(UIVideoEditorController *)editor{
NSLog(@"视频编辑取消");
[editor dismissViewControllerAnimated:YES completion:NULL];
}
- (void)video:(NSString *)videoPath
didFinishSavingWithError:(NSError *)error
contextInfo:(NSString *)contextInfo {
NSString *title; NSString *message;
if (!error) {
title = @"视频保存";
message = @"视频已经保存到设备的相机胶卷中";
} else {
title = @"视频失败";
message = [error description];
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title
message:message
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
原书:http://item.jd.com/11522516.html
<图形图像,动画,多媒体> 读书笔记 --- 录制与编辑视频
原文地址：http://blog.csdn.net/ioswyl88219/article/details/40052467
