Question

我使用SCRecorder自定义视频。我想导入一些本地视频来制作更长的视频并保存到相机胶卷。我使用SCRecord lib来实现它。首先，我为每个本地视频制作每个SCRecordSegment：

filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory,[NSString stringWithFormat:@"%@.mp4",videoTitle]];
        // Create
        SCRecordSessionSegment *record = [[SCRecordSessionSegment alloc] initWithURL:[NSURL URLWithString:filePath] info:nil];

然后我创建了RecordSession：

SCRecordSession *recordSession = [SCRecordSession recordSession];
[recordSession addSegment:record];

但是当我保存到相机胶卷时崩溃了。

- (void)saveToCameraRoll : (SCRecordSession *)recordSession{
self.navigationItem.rightBarButtonItem.enabled = NO;


SCAssetExportSession *exportSession = [[SCAssetExportSession alloc] initWithAsset:recordSession.assetRepresentingSegments];
exportSession.videoConfiguration.filter = nil;
exportSession.videoConfiguration.preset = SCPresetHighestQuality;
exportSession.audioConfiguration.preset = SCPresetHighestQuality;
exportSession.videoConfiguration.maxFrameRate = 35;
exportSession.outputUrl = recordSession.outputUrl;

exportSession.outputFileType = AVFileTypeMPEG4;
exportSession.delegate = self;
exportSession.contextType = SCContextTypeAuto;



NSLog(@"Starting exporting");

CFTimeInterval time = CACurrentMediaTime();
__weak typeof(self) wSelf = self;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
    __strong typeof(self) strongSelf = wSelf;

    if (!exportSession.cancelled) {
        NSLog(@"Completed compression in %fs", CACurrentMediaTime() - time);
    }


    NSError *error = exportSession.error;
    if (exportSession.cancelled) {
        NSLog(@"Export was cancelled");
    } else if (error == nil) {
        [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
        [exportSession.outputUrl saveToCameraRollWithCompletion:^(NSString * _Nullable path, NSError * _Nullable error) {
            [[UIApplication sharedApplication] endIgnoringInteractionEvents];

            if (error == nil) {
                [[[UIAlertView alloc] initWithTitle:@"Saved to camera roll" message:@"" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
            } else {
                [[[UIAlertView alloc] initWithTitle:@"Failed to save" message:error.localizedDescription delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
            }
        }];
    } else {
        if (!exportSession.cancelled) {
            [[[UIAlertView alloc] initWithTitle:@"Failed to save" message:error.localizedDescription delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] show];
        }
    }
}];

}

Answer 1

您没有先合并视频片段。以下是我的代码

中的示例

Error using integralCalc/finalInputChecks (line 515)
Output of the function must be the same size as the input. If FUN is an array-valued integrand, set
the 'ArrayValued' option to true.
Error in integralCalc/iterateScalarValued (line 315)
                finalInputChecks(x,fx);
Error in integralCalc/vadapt (line 132)
            [q,errbnd] = iterateScalarValued(u,tinterval,pathlen);
Error in integralCalc (line 75)
        [q,errbnd] = vadapt(@AtoBInvTransform,interval);
Error in integral (line 88)
Q = integralCalc(fun,a,b,opstruct); 
515             error(message('MATLAB:integral:FxNotSameSizeAsX'));

SCRecorder：如何从本地视频创建SCRecordSession

1 个答案: