我是新手,试图创建一个应用程序,记录视频或从库中选择视频,比我上传视频到网络。但这个文件没有在一些 android 设备播放。所以我想将其转换为mp4格式。
因此，我想问一下如何将保存的mov转换为mp4在objective-C？
仅供参考，我已经研究了很多，但没有发现任何有用的信息。
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];
videoURL = info[UIImagePickerControllerMediaURL];
if (UIVideoAtPathIsCompatibleWithSavedPhotosAl(moviePath))
{
UISaveVideoAtPathToSavedPhotosAl(moviePath, self, nil, nil);
}
}
[self dismissViewControllerAnimated:YES completion:nil];
}
5
您可以签出my so post。它可能会对您有所帮助
你在做正确的事情..现在你需要将这个 mov 文件转换为 mp4 如下。
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
if (CFStringCompare ((__bridge_retained CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo)
{
if (UIVideoAtPathIsCompatibleWithSavedPhotosAl(moviePath))
{
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *moviePath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
NSString *videoPath1 =[NSString stringWithFormat:@"%@/xyz.mov",docDir];
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSData *videoData = [NSData dataWithContentsOfURL:videoURL];
[videoData writeToFile:videoPath1 atomically:NO];
// UISaveVideoAtPathToSavedPhotosAl(moviePath, self, nil, nil);
}
}
URLAsset *avAsset = [URLAsset URLAssetWithURL:[NSURL fileURLWithPath:videoPath1] options:nil];
NSArray *compatiblePresets = [AssetExportSession exportPresetsCompatibleWithAsset:avAsset];
if ([compatiblePresets containsObject:AssetExportPresetLowQuality])
{
AssetExportSession *exportSession = [[AssetExportSession alloc]initWithAsset:avAsset presetName:AssetExportPresetPthrough];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
videoPath = [NSString stringWithFormat:@"%@/xyz.mp4", [paths objectAtIndex:0]];
exportSession.outputURL = [NSURL fileURLWithPath:videoPath];
NSLog(@"videopath of your mp4 file = %@",videoPath); // PATH OF YOUR .mp4 FILE
exportSession.outputFileType = FileTypeMPEG4;
// CMTime start = CMTimeMakeWithSeconds(1.0, 600);
// CMTime duration = CMTimeMakeWithSeconds(3.0, 600);
// CMTimeRange range = CMTimeRangeMake(start, duration);
// exportSession.timeRange = range;
// UNCOMMENT ABOVE LINES FOR CROP VIDEO
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status]) {
case AssetExportSessionStatusFailed:
NSLog(@"Export failed: %@", [[exportSession error] localizedDescription]);
break;
case AssetExportSessionStatusCancelled:
NSLog(@"Export canceled");
break;
default:
break;
}
UISaveVideoAtPathToSavedPhotosAl(videoPath, self, nil, nil);
[exportSession release];
}];
}
[self dismissViewControllerAnimated:YES completion:nil];
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