1
2 인물 사진이 있습니다. 하나는 기본 아이폰 카메라에서 찍은 두 번째 하나는 내 응용 프로그램에서 UIIMagePickerController를 사용하여 기록입니다.비디오에 CIFilter를 제대로 적용하지 않습니다.
비디오 1에 cifilter를 적용하면 필터가 완벽하게 적용되지만 두 번째 비디오에 필터를 적용하면 비디오가 절반으로 흐려지고 비디오 부분이 흐려지고 늘어납니다. 그러면 내보낼 때 회전해야합니다. 이 코드는 두 번째 비디오를 위해 일하지 않는
AVAssetTrack *FirstAssetTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
CIFilter *filter = [CIFilter filterWithName:@"CIPhotoEffectInstant"];
player.currentItem.videoComposition = [AVVideoComposition videoCompositionWithAsset: asset applyingCIFiltersWithHandler:^(AVAsynchronousCIImageFilteringRequest *request){
// Clamp to avoid blurring transparent pixels at the image edges
CIImage *source = [request.sourceImage imageByClampingToExtent];
source = [source imageByApplyingTransform:FirstAssetTrack.preferredTransform];
[filter setValue:source forKey:kCIInputImageKey];
// Crop the blurred output to the bounds of the original image
CIImage *output = [filter.outputImage imageByCroppingToRect:request.sourceImage.extent];
// Provide the filter output to the composition
[request finishWithImage:output context:nil];
}];
내 코드는 그래서 두 번째 비디오 에 대한 몇 가지 변경 사항이 적절한 코드가 아닙니다하지만 난 크기와 방향을 확인하고 싶은 후 방향 변화의 작품을 잘 AVPlayer를에서 플레이하지만 내가이 링크를 확인
AVPlayer plays video composition result incorrectly
회전 내보낼 때 우리 모두 직면 같은 문제 때문에 내가이 여전히 가공용하지에 따라 내 코드를 변경하는 경우 올바르게 입력하십시오.AVAssetTrack *FirstAssetTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
CIFilter *filter = [CIFilter filterWithName:@"CIPhotoEffectInstant"];
UIImageOrientation FirstAssetOrientation_ = UIImageOrientationUp;
BOOL isFirstAssetPortrait_ = NO;
CGAffineTransform firstTransform = FirstAssetTrack.preferredTransform;
if(firstTransform.a == 0 && firstTransform.b == 1.0 && firstTransform.c == -1.0 && firstTransform.d == 0) {
FirstAssetOrientation_= UIImageOrientationRight;
isFirstAssetPortrait_ = YES;
}
if(firstTransform.a == 0 && firstTransform.b == -1.0 && firstTransform.c == 1.0 && firstTransform.d == 0) {
FirstAssetOrientation_ = UIImageOrientationLeft;
isFirstAssetPortrait_ = YES;
}
if(firstTransform.a == 1.0 && firstTransform.b == 0 && firstTransform.c == 0 && firstTransform.d == 1.0) {
FirstAssetOrientation_ = UIImageOrientationUp;
}
if(firstTransform.a == -1.0 && firstTransform.b == 0 && firstTransform.c == 0 && firstTransform.d == -1.0) {
FirstAssetOrientation_ = UIImageOrientationDown;
}
player.currentItem.videoComposition = [AVVideoComposition videoCompositionWithAsset:asset applyingCIFiltersWithHandler:^(AVAsynchronousCIImageFilteringRequest * _Nonnull request) {
// Step 1: get the input frame image (screenshot 1)
CIImage *sourceImage = request.sourceImage;
// Step 2: rotate the frame
CIFilter *transformFilter = [CIFilter filterWithName:@"CIAffineTransform"];
[transformFilter setValue:sourceImage forKey: kCIInputImageKey];
[transformFilter setValue: [NSValue valueWithCGAffineTransform: firstTransform] forKey: kCIInputTransformKey];
sourceImage = transformFilter.outputImage;
CGRect extent = sourceImage.extent;
CGAffineTransform translation = CGAffineTransformMakeTranslation(-extent.origin.x, -extent.origin.y);
[transformFilter setValue:sourceImage forKey: kCIInputImageKey];
[transformFilter setValue: [NSValue valueWithCGAffineTransform: translation] forKey: kCIInputTransformKey];
sourceImage = transformFilter.outputImage;
// Step 3: apply the custom filter chosen by the user
extent = sourceImage.extent;
sourceImage = [sourceImage imageByClampingToExtent];
[filter setValue:sourceImage forKey:kCIInputImageKey];
sourceImage = filter.outputImage;
sourceImage = [sourceImage imageByCroppingToRect:extent];
// make the frame the same aspect ratio as the original input frame
// by adding empty spaces at the top and the bottom of the extent rectangle
CGFloat newHeight = 1920 * 1920/extent.size.height;
CGFloat inset = (extent.size.height - newHeight)/2;
extent = CGRectInset(extent, 0, inset);
sourceImage = [sourceImage imageByCroppingToRect:extent];
// scale down to the original frame size
CGFloat scale = 1920/newHeight;
CGAffineTransform scaleTransform = CGAffineTransformMakeScale(scale, scale*3.2);
[transformFilter setValue:sourceImage forKey: kCIInputImageKey];
[transformFilter setValue: [NSValue valueWithCGAffineTransform: scaleTransform] forKey: kCIInputTransformKey];
sourceImage = transformFilter.outputImage;
// translate the frame to make it's origin start at (0, 0)
CGAffineTransform translation1 = CGAffineTransformMake(1, 0, 0, 1, 0, 0);
[transformFilter setValue:sourceImage forKey: kCIInputImageKey];
[transformFilter setValue: [NSValue valueWithCGAffineTransform: translation1] forKey: kCIInputTransformKey];
sourceImage = transformFilter.outputImage;
// Step 4: finish processing the frame (screenshot 2)
[request finishWithImage:sourceImage context:nil];
}];