在录制视频之前,我在调用摄像机视图时实现了叠加视图.
pickerController.cameraOverlayView =myOverlay;
视频录制并在录制视频和通过电子邮件等共享后将视频保存到相册中一切正常.
如果我将视频质量用作"高品质",那么录制的视频已变得庞大.例如,如果我以高质量录制视频30秒,录制的视频大约为30 - 40 mb.
pickerController.videoQuality = UIImagePickerControllerQualityTypeHigh;
如何在共享之前对高质量录制视频进行压缩编程,就像Apple如何使用内置录像机一样？
请指导我解决这个问题.
谢谢!
更新:
这就是我最近的尝试,但仍然没有成功:我想压缩拍摄的录制视频来到didFinishPickingMediaWithInfo并存储在相同的相册实际视频路径本身,而不是其他任何地方.我测试同一个视频被压缩到非常小的尺寸,当我从照片库中选择时,但从相机拍摄的同一视频来自didFinishPickingMediaWithInfo并未压缩,尽管我使用下面的AVAssetExportSession代码.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSString *urlPath = [videoURL path];
if ([[urlPath lastPathComponent] isEqualToString:@"capturedvideo.MOV"])
{
if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum (urlPath))
{
[self copyTempVideoToMediaLibrary :urlPath];
}
else
{
NSLog(@"Video Capture Error: Captured video cannot be saved...didFinishPickingMediaWithInfo()");
}
}
else
{
NSLog(@"Processing soon to saved photos album...else loop of lastPathComponent..didFinishPickingMediaWithInfo()");
}
}
[self …我正在创建一个应用程序,我需要录制视频并将其上传到服务器.现在我的项目也有一个Android版本.为了支持Android版本,我必须以mp4格式录制视频.我按照本教程将UIImagePicker媒体类型设置为电影格式imagePicker.mediaTypes = [kUTTypeMovie as String]
这UIImagePickerController对我的要求是完美的,我唯一需要改变的是它的mp4保存格式.我试着kUTTypeMPEG4在mediaTypes,但它在运行时没有错误描述抛出错误.
这是我的视频拍摄功能
func startCameraFromViewController() {
if UIImagePickerController.isSourceTypeAvailable(.Camera) == false {
return
}
viewBlack.hidden = false
presentViewController(cameraController, animated: false, completion: nil)
cameraController.sourceType = .Camera
cameraController.mediaTypes = [kUTTypeMovie as String]
//cameraController.mediaTypes = [kUTTypeMPEG4 as String]
cameraController.cameraCaptureMode = .Video
cameraController.videoQuality = .TypeMedium
if(getPurchaseId() as! Int == 0)
{
if(txtBenchMark.text?.isEmpty == false)
{
cameraController.videoMaximumDuration = NSTimeInterval(300.0)
}else{
cameraController.videoMaximumDuration = NSTimeInterval(60.0)
}
}else{
cameraController.videoMaximumDuration = NSTimeInterval(600.0)
}
cameraController.allowsEditing = false
} …我UIImagePickerController用来从库中捕获和选择视频文件.我必须限制用户只捕获大小小于或等于的视频5MB.那有什么解决方案吗？
是否可以保存视频并将其添加到自定义 ALAsset，以 mp4 格式从 UIImagePicker 捕获？或者我必须将它保存在 .mov 中并通过 AVAssetExportSession 进行压缩？
我是新手,并尝试创建一个记录视频或从库中选择视频的应用程序,而不是我将该视频上传到网络.但是这个文件不能在某些Android设备上播放.所以我想将其转换为mp4格式.
因此,我要问如何转换保存mov到mp4的objective-C？
仅供参考我已经研究了很多,但没有找到任何有用的信息.
这是我的代码:
- (void)openCamera {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
picker.showsCameraControls = YES;
picker.allowsEditing = YES;
picker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
[self presentViewController:picker animated:YES completion:nil];
}
- (void) imagePickerController: (UIImagePickerController *) picker didFinishPickingMediaWithInfo: (NSDictionary *) info {
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
if (CFStringCompare ((__bridge_retained CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo)
{
NSString *moviePath = [[info objectForKey:UIImagePickerControllerMediaURL] path]; …