无法使用AVAssetExportSession修剪视频 [英] Unable to trim a video using AVAssetExportSession
本文介绍了无法使用AVAssetExportSession修剪视频的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想裁剪视频:
-(void)trimVideo:(NSURL*)outputURL
{
//[[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:outputURL options:nil];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetLowQuality];
NSString * outputFilePath = NSHomeDirectory();
outputFilePath = [outputFilePath stringByAppendingPathComponent:@"Library"];
outputFilePath = [outputFilePath stringByAppendingPathComponent:@"temp.mov"];
NSURL * outputFileUrl = [NSURL fileURLWithPath:outputFilePath];
exportSession.outputURL = outputFileUrl;
exportSession.shouldOptimizeForNetworkUse = YES;
exportSession.outputFileType = AVFileTypeMPEG4;
CMTime start = CMTimeMakeWithSeconds(1.0, 600);
CMTime duration = CMTimeMakeWithSeconds(3.0, 600);
CMTimeRange range = CMTimeRangeMake(start, duration);
exportSession.timeRange = range;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void)
{
NSLog(@"Export Complete %d %@", exportSession.status, exportSession.error);
//[exportSession release];
}];
}
但我收到错误:
Export Complete 4 Error Domain=AVFoundationErrorDomain Code=-11823 "Cannot Save" UserInfo=0x2008f420 {NSLocalizedRecoverySuggestion=Try saving again., NSLocalizedDescription=Cannot Save}
不确定如何解决。
推荐答案
这就是诀窍:
-(void)trimVideo:(NSURL*)videoToTrimURL
{
//[[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:videoToTrimURL options:nil];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetHighestQuality];
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];
exportSession.outputURL = [NSURL fileURLWithPath:outputURL];
exportSession.shouldOptimizeForNetworkUse = YES;
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTime start = CMTimeMakeWithSeconds(1.0, 600);
CMTime duration = CMTimeMakeWithSeconds(3.0, 600);
CMTimeRange range = CMTimeRangeMake(start, duration);
exportSession.timeRange = range;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void)
{
switch (exportSession.status) {
case AVAssetExportSessionStatusCompleted:
[self writeVideoToPhotoLibrary:[NSURL fileURLWithPath:outputURL]];
NSLog(@"Export Complete %d %@", exportSession.status, exportSession.error);
break;
case AVAssetExportSessionStatusFailed:
NSLog(@"Failed:%@",exportSession.error);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Canceled:%@",exportSession.error);
break;
default:
break;
}
//[exportSession release];
}];
}
这篇关于无法使用AVAssetExportSession修剪视频的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文