AVAssetExportSessionStatusFailed：ビデオは、私は、ビデオのスローモーション効果に取り組んでいますし、すべてがiOSの11の下に正常に動作している-16364

Question

エラーで失敗しましたエクスポートするが、私はiOSの11で次のエラーを取得しています：私が試してみました

Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-16364), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x608000456620 {Error Domain=NSOSStatusErrorDomain Code=-16364 "(null)"}} 

この問題に関しては知っていますが、これに対する正確な解決策は見つかりませんでした。

以下

参照のための私のコード場合：

- (void)applySlowMoOnAsset:(NSURL *)assetURL { 
    AVAsset *videoAsset = [[AVURLAsset alloc] initWithURL:assetURL options:nil]; 

    AVMutableComposition *mixComposition = [AVMutableComposition composition]; 
    AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo 
                        preferredTrackID:kCMPersistentTrackID_Invalid]; 

    AVMutableCompositionTrack *compositionAudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; 

    AVAssetTrack *videoAssetTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0]; 

    NSError *videoInsertError = nil; 

    BOOL videoInsertResult = [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration) 
                  ofTrack: videoAssetTrack 
                  atTime:kCMTimeZero 
                   error:&videoInsertError]; 

    if (!videoInsertResult || nil != videoInsertError) { 
     NSLog(@"VideoInsertError %@",videoInsertError); 
     return; 
    } 

    if ([[videoAsset tracksWithMediaType:AVMediaTypeAudio] count] > 0) { 
     AVAssetTrack *audioTrack = [[videoAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0]; 

     if (audioTrack != nil) { 

      NSError *error; 
      BOOL audioInsertResult = [compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, [videoAsset duration]) ofTrack:audioTrack atTime:kCMTimeZero error:&error]; 

      NSLog(@"audioInsertResult %d with error description %@", audioInsertResult, [error description]); 
     } 
    } 

    compositionVideoTrack.preferredTransform = videoAssetTrack.preferredTransform; 

    double videoScaleFactor = 4.0; 

    CMTime videoDuration = videoAsset.duration; 

    NSLog(@"slo-Mo begin time %f slo-Mo endTime %f Actual Video duration %f", CMTimeGetSeconds(self.sloMoStartHead), CMTimeGetSeconds(self.sloMoEndHead), CMTimeGetSeconds(videoDuration)); 

    CMTime scaledDuration = CMTimeSubtract(self.sloMoEndHead, self.sloMoStartHead); 

    CMTime normalDuration = CMTimeSubtract(videoDuration, scaledDuration); 

    NSLog(@"Slow-Mo duration %f Normal Video Duration %f scaled slo-mo duration %f ", CMTimeGetSeconds(scaledDuration), CMTimeGetSeconds(CMTimeMake(normalDuration.value, normalDuration.timescale)), CMTimeGetSeconds(CMTimeMake(scaledDuration.value * videoScaleFactor, scaledDuration.timescale))); 

    CMTime newTime = CMTimeAdd(CMTimeMake(self.sloMoStartHead.value, self.sloMoStartHead.timescale), CMTimeMake(scaledDuration.value * videoScaleFactor, scaledDuration.timescale)); 

    CMTime exportedTime = CMTimeAdd(newTime, CMTimeMake(normalDuration.value, normalDuration.timescale)); 

    NSLog(@"FinalTime for slowMo video %f", CMTimeGetSeconds(exportedTime)); 

    [compositionVideoTrack scaleTimeRange:CMTimeRangeMake(self.sloMoStartHead, self.sloMoEndHead) toDuration:newTime]; 

    [compositionAudioTrack scaleTimeRange:CMTimeRangeMake(self.sloMoStartHead, self.sloMoEndHead) toDuration:newTime]; 

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentDirectory = paths[0]; 
    NSFileManager *manager = [NSFileManager defaultManager]; 
    [manager createDirectoryAtPath:documentDirectory withIntermediateDirectories:YES attributes:nil error:nil]; 
    NSString *outputStr = [documentDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4",@"exportedVideo"]]; 
    // Remove Existing File 
    [manager removeItemAtPath:outputStr error:nil]; 

    NSLog(@"outputStr = %@",outputStr); 

    AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetMediumQuality]; 

    exportSession.outputURL = [NSURL fileURLWithPath:outputStr]; // output path; 

    exportSession.outputFileType = AVFileTypeMPEG4; 

    [AVAssetExportSession determineCompatibilityOfExportPreset:AVAssetExportPresetMediumQuality 
                withAsset:mixComposition 
               outputFileType:AVFileTypeMPEG4 
              completionHandler:^(BOOL compatible) { 

               DLog(@"compatible = %d",compatible); 

               if (compatible) { 

                [exportSession determineCompatibleFileTypesWithCompletionHandler:^(NSArray<AVFileType> * _Nonnull compatibleFileTypes) { 

                 DLog(@"compatibleFileTypes = %@",compatibleFileTypes); 

                 [exportSession exportAsynchronouslyWithCompletionHandler:^(void) { 

                  switch (exportSession.status) { 
                   case AVAssetExportSessionStatusCompleted: 

                    NSLog(@"AVAssetExportSessionStatusCompleted"); 
                    NSLog(@"slow-mo video saved with path url %@", exportSession.outputURL); 
                    break; 

                    case AVAssetExportSessionStatusFailed: 

                    NSLog(@"AVAssetExportSessionStatusFailed"); 
                    NSLog(@"exportSession.error = &@",exportSession.error); 
                    break; 

                   case AVAssetExportSessionStatusCancelled: 

                    NSLog(@"AVAssetExportSessionStatusCancelled"); 
                    NSLog(@"exportSession.error = &@",exportSession.error); 
                    break; 

                   default: 
                    break; 
                  } 
                 }]; 
                }]; 
               } 
              }]; 
    } 

印刷ログは以下の通りです：

audioInsertResult 1 with error description (null) 

slo-Mo begin time 2.476292 slo-Mo endTime 4.666674 Actual Video duration 11.033333 

Slow-Mo duration 2.190382 Normal Video Duration 8.842951 scaled slo-mo duration 8.761529 

FinalTime for slowMo video 20.080772 

outputURL = /Users/xyz/Library/Developer/CoreSimulator/Devices/92F3DB9A-A923-4CDA-9941-190AED9D844F/data/Containers/Data/Application/1B9A30B4-B14B-483B-91B6-D965C4366A53/Documents/exportedVideo.mp4 

compatible = 1 

compatibleFileTypes = (
    "com.apple.m4v-video", 
    "com.apple.quicktime-movie", 
    "public.mpeg-4" 
) 

AVAssetExportSessionStatusFailed 

exportSession.error = Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-16364), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x608000456620 {Error Domain=NSOSStatusErrorDomain Code=-16364 "(null)"}} 

誰もがこのことについてどのような理由を知っていますか？

詳細については、私に知らせてください。私はそれに応じて私の質問を更新します。

Answer 1

は多分AVAssetExportPresetHEVCHighestQualityまたは他のHEVCプリセットに、AVExportSession presetNameを変更してみてください。 AVAssetExportPresetHEVCHighestQualityはiOS 11.0以上でご利用いただけますので、@availableチェックを必ずお守りください。

AVAssetExportSession *exportSession = nil; 

if (@available(iOS 11.0, *)) { 
    exportSession = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHEVCHighestQuality]; 
} else { 
    exportSession = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName: AVAssetExportPresetMediumQuality]; 
}