1
- ビデオの緑色の線を削除する方法。 ビデオをクロップするときは、その時点で2〜3回ビデオが緑色に表示されるか、緑色または赤色の点滅ラインがビデオの左または下に、または左と下の両方でビデオにミックスされます。iOS：ビデオの奇妙な緑色の線の左右を切り取る
ビデオ作物法は、それを解決するためにどのようにビデオがトリミング後に見られた作物グリーンライン、-Video
-(void)cropButton
{
CGRect cropFrame = self.cropView.croppedImageFrame;
//load our movie Asset
AVAsset *asset;
asset = [AVAsset assetWithURL:[NSURL fileURLWithPath:[self.videoDataArr objectAtIndex:self.selectedIndex-1]]];
//create an avassetrack with our asset
AVAssetTrack *clipVideoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
//create a video composition and preset some settings
AVMutableVideoComposition* videoComposition = [AVMutableVideoComposition videoComposition];
videoComposition.frameDuration = CMTimeMake(1, 30);
//create a video instruction
AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
instruction.timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration);
AVMutableVideoCompositionLayerInstruction* transformer = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:clipVideoTrack];
UIImageOrientation videoOrientation = [self getVideoOrientationFromAsset:asset];
CGAffineTransform t1 = CGAffineTransformIdentity;
CGAffineTransform t2 = CGAffineTransformIdentity;
switch (videoOrientation)
{
case UIImageOrientationUp:
t1 = CGAffineTransformMakeTranslation(clipVideoTrack.naturalSize.height - cropFrame.origin.x, 0 - cropFrame.origin.y);
t2 = CGAffineTransformRotate(t1, M_PI_2);
break;
case UIImageOrientationDown:
t1 = CGAffineTransformMakeTranslation(0 - cropFrame.origin.x, clipVideoTrack.naturalSize.width - cropFrame.origin.y); // not fixed width is the real height in upside down
t2 = CGAffineTransformRotate(t1, - M_PI_2);
break;
case UIImageOrientationRight:
t1 = CGAffineTransformMakeTranslation(0 - cropFrame.origin.x, 0 - cropFrame.origin.y);
t2 = CGAffineTransformRotate(t1, 0);
break;
case UIImageOrientationLeft:
t1 = CGAffineTransformMakeTranslation(clipVideoTrack.naturalSize.width - cropFrame.origin.x, clipVideoTrack.naturalSize.height - cropFrame.origin.y);
t2 = CGAffineTransformRotate(t1, M_PI);
break;
default:
NSLog(@"no supported orientation has been found in this video");
break;
}
CGAffineTransform finalTransform = t2;
videoComposition.renderSize = CGSizeMake(cropFrame.size.width,cropFrame.size.height);
[transformer setTransform:finalTransform atTime:kCMTimeZero];
//add the transformer layer instructions, then add to video composition
instruction.layerInstructions = [NSArray arrayWithObject:transformer];
videoComposition.instructions = [NSArray arrayWithObject: instruction];
//Create an Export Path to store the cropped video
NSString * documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
__block NSString *exportPath = [documentsPath stringByAppendingFormat:@"/CroppedVideo.mp4"];
NSURL *exportUrl = [NSURL fileURLWithPath:exportPath];
//Remove any prevouis videos at that path
[[NSFileManager defaultManager] removeItemAtURL:exportUrl error:nil];
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetHighestQuality] ;
exporter.videoComposition = videoComposition;
exporter.outputURL = exportUrl;
NSLog(@"exported url : %@",exportUrl);
exporter.outputFileType = AVFileTypeQuickTimeMovie;
[exporter exportAsynchronouslyWithCompletionHandler:^
{
dispatch_async(dispatch_get_main_queue(), ^{
switch ([exporter status]) {
case AVAssetExportSessionStatusCompleted:
{
self.navigationController.toolbarHidden = YES;
NSError *error = nil;
NSString *targetPath;
targetPath = [self.videoDataArr objectAtIndex:self.selectedIndex-1];
[FILEMANAGER removeItemAtPath:targetPath error:&error];
if(error)
{
NSLog(@"Error is : %@",error);
}
error = nil;
[FILEMANAGER moveItemAtPath:exportPath toPath:targetPath error:&error];
if(error)
{
NSLog(@"Error is : %@",error);
}
self.mySAVideoRangeSlider.videoUrl = self.videourl;
[self.mySAVideoRangeSlider getMovieFrame];
}
break;
}
case AVAssetExportSessionStatusFailed:
NSLog(@"Export failed: %@", [[exporter error] localizedDescription]);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Export canceled");
break;
default:
NSLog(@"NONE");
dispatch_async(dispatch_get_main_queue(), ^{
});
break;
}
});
}];
}
。