AVSimpleEditor/AVSEExportCommand.m
/* |
File: AVSEExportCommand.m |
Abstract: A subclass of AVSECommand which handles AVAssetExportSession. It exports AVMutableComposition along with AVMutableVideoComposition and AVMutableAudioMix to a Quicktime movie. |
Version: 1.1 |
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*/ |
#import "AVSEExportCommand.h" |
@interface AVSEExportCommand (Internal) |
- (void)writeVideoToPhotoLibrary:(NSURL *)url; |
@end |
@implementation AVSEExportCommand |
- (void)performWithAsset:(AVAsset *)asset |
{ |
// Step 1 |
// Create an outputURL to which the exported movie will be saved |
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); |
NSString *outputURL = paths[0]; |
NSFileManager *manager = [NSFileManager defaultManager]; |
[manager createDirectoryAtPath:outputURL withIntermediateDirectories:YES attributes:nil error:nil]; |
outputURL = [outputURL stringByAppendingPathComponent:@"output.mp4"]; |
// Remove Existing File |
[manager removeItemAtPath:outputURL error:nil]; |
// Step 2 |
// Create an export session with the composition and write the exported movie to the photo library |
self.exportSession = [[AVAssetExportSession alloc] initWithAsset:[self.mutableComposition copy] presetName:AVAssetExportPreset1280x720]; |
self.exportSession.videoComposition = self.mutableVideoComposition; |
self.exportSession.audioMix = self.mutableAudioMix; |
self.exportSession.outputURL = [NSURL fileURLWithPath:outputURL]; |
self.exportSession.outputFileType=AVFileTypeQuickTimeMovie; |
[self.exportSession exportAsynchronouslyWithCompletionHandler:^(void){ |
switch (self.exportSession.status) { |
case AVAssetExportSessionStatusCompleted: |
[self writeVideoToPhotoLibrary:[NSURL fileURLWithPath:outputURL]]; |
// Step 3 |
// Notify AVSEViewController about export completion |
[[NSNotificationCenter defaultCenter] |
postNotificationName:AVSEExportCommandCompletionNotification |
object:self]; |
break; |
case AVAssetExportSessionStatusFailed: |
NSLog(@"Failed:%@",self.exportSession.error); |
break; |
case AVAssetExportSessionStatusCancelled: |
NSLog(@"Canceled:%@",self.exportSession.error); |
break; |
default: |
break; |
} |
}]; |
} |
- (void)writeVideoToPhotoLibrary:(NSURL *)url |
{ |
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; |
[library writeVideoAtPathToSavedPhotosAlbum:url completionBlock:^(NSURL *assetURL, NSError *error){ |
if (error) { |
NSLog(@"Video could not be saved"); |
} |
}]; |
} |
@end |
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