修剪後AVAssetExportSession失敗

此方法有什麼問題。傳遞的filePath是來自tmp文件夾的電影文件的nsstring路徑，outputPath是文檔文件夾中的重命名文件路徑。 exportSession失敗，狀態碼爲4，描述爲 - 未知。我想要最後5秒的視頻。修剪後AVAssetExportSession失敗

-(BOOL)trimVideofileFile:(NSString*)filePath toFileURL:(NSString*)outputPath 
    { 

NSURL *sourceMovieURL = [NSURL fileURLWithPath:filePath]; 
AVURLAsset *sourceAsset = [AVURLAsset URLAssetWithURL:sourceMovieURL options:nil]; 
Float64 videoLength = CMTimeGetSeconds(sourceAsset.duration); 
NSLog(@"Duration of Video is %f",videoLength); 

float videoStartTime = 0.0f;//define start time of video 
float videoEndTime = 5.0f;//define end time of video 

videoEndTime = videoLength ; 
NSLog(@"Video end times - %f",videoEndTime); 

if (videoLength>5.000f) { 
    videoStartTime = videoEndTime - 5.000f; 
    NSLog(@"Video Start Time - %f",videoStartTime); 
} 


NSURL *videoFileInput = [NSURL fileURLWithPath:filePath];//<Path of orignal Video file> 
NSURL *videoFileOutPut = [NSURL fileURLWithPath:outputPath]; 


NSLog(@"Original File - %@",videoFileInput); 
NSLog(@"Output Path - %@",videoFileOutPut); 


if (!videoFileInput || !videoFileOutPut) 
{ 
    return NO; 
} 

[[NSFileManager defaultManager] removeItemAtURL:[NSURL URLWithString:filePath] error:NULL]; 
AVAsset *asset = [AVAsset assetWithURL:[NSURL URLWithString:filePath]]; 

AVAssetExportSession *exportSession = [AVAssetExportSession exportSessionWithAsset:asset 
                     presetName:AVAssetExportPresetLowQuality]; 
if (exportSession == nil) 
{ 
    return NO; 
} 
CMTime startTime = CMTimeMake((int)(floor(videoStartTime * 100)), 100); 
CMTime stopTime = CMTimeMake((int)(ceil(videoEndTime * 100)), 100); 
CMTimeRange exportTimeRange = CMTimeRangeFromTimeToTime(startTime, stopTime); 

exportSession.outputURL = videoFileOutPut; 
exportSession.timeRange = exportTimeRange; 
exportSession.outputFileType = AVFileTypeQuickTimeMovie; 


[exportSession exportAsynchronouslyWithCompletionHandler:^ 
{ 
    if (AVAssetExportSessionStatusCompleted == exportSession.status) 
    { 
     NSLog(@"Export OK"); 
    } 
    else if (AVAssetExportSessionStatusFailed == exportSession.status) 
    { 
     NSLog(@"Export failed: %@ - %ld", [[exportSession error] localizedDescription],(long)exportSession.status); 
    } 

}]; 
return YES; 

}

錯誤詳細信息： -

Export failed: Error Domain=NSURLErrorDomain Code=-1 "unknown error" UserInfo={NSErrorFailingURLStringKey=/private/var/mobile/Containers/Data/Application/489B0A94-3620-41D6-A254-454025AC32B5/tmp/movie.mov, NSErrorFailingURLKey=/private/var/mobile/Containers/Data/Application/489B0A94-3620-41D6-A254-454025AC32B5/tmp/movie.mov, NSLocalizedDescription=unknown error, NSUnderlyingError=0x15d7a990 {Error Domain=NSOSStatusErrorDomain Code=-12935 "(null)"}, NSURL=/private/var/mobile/Containers/Data/Application/489B0A94-3620-41D6-A254-454025AC32B5/tmp/movie.mov}

來源

2015-09-29 Rijiva

當你運行這段代碼時，你看過'startTime'和'stopTime'的值嗎？ – ChrisH

是的。我現在也嘗試了3種其他方式。我得到這個錯誤..請參閱編輯錯誤的詳細信息@ChrisH – Rijiva

看看這裏：http://stackoverflow.com/questions/4001755/trying-to-understand-cmtime-and-cmtimemake – ChrisH

上面的代碼是完全好。問題在於，我在讓exportSession完成作業之前重新啓動了視頻錄製。因此，正在處理exportSession的異步任務。輸入的movie.mov文件正在被相機覆蓋。因此，這個問題。不要重複！

來源

2015-09-29 15:28:38 Rijiva

修剪後AVAssetExportSession失敗

回答

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