我試圖讓一組圖像的視頻,我發現一些代碼,得到它的工作創建從圖像中的數組視頻並保存到相機膠捲
但視頻不會被保存到照片庫它給了我這個錯誤:
Documentsa.mov無法保存到保存的照片相冊:錯誤域= NSOSStatusErrorDomain代碼= 2「這部電影無法播放。」的UserInfo = 0x922cf60 {NSLocalizedDescription =這部電影無法播放。}
這是我使用的代碼:
NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
UIImage * i = [UIImage imageNamed:@"IMG_1650.JPG"];
CGAffineTransform transform = CGAffineTransformMakeRotation((M_PI/180)*90);
GPUImageTransformFilter * filter = [[GPUImageTransformFilter alloc]init];
[filter setAffineTransform:transform];
UIImage * im = [filter imageByFilteringImage:i];
im = [filter imageByFilteringImage:im];
[self writeImagesToMovieAtPath:[NSString stringWithFormat:@"%@/%@",documentsDirectoryPath,@"a.mov"] withSize:CGSizeMake(i.size.width, i.size.height)];
NSString* exportVideoPath = [NSString stringWithFormat:@"%@%@",documentsDirectoryPath,@"a.mov"];
UISaveVideoAtPathToSavedPhotosAlbum (exportVideoPath,self, @selector(video:didFinishSavingWithError: contextInfo:), nil);
這是我用它來創建視頻代碼:
-(void) writeImagesToMovieAtPath:(NSString *) path withSize:(CGSize) size
{
NSLog(@"Write Started");
NSError *error = nil;
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:
[NSURL fileURLWithPath:path] fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264, AVVideoCodecKey,
[NSNumber numberWithInt:size.width], AVVideoWidthKey,
[NSNumber numberWithInt:size.height], AVVideoHeightKey,
nil];
AVAssetWriterInput* videoWriterInput = [[AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings] retain];
AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:videoWriterInput
sourcePixelBufferAttributes:nil];
NSParameterAssert(videoWriterInput);
NSParameterAssert([videoWriter canAddInput:videoWriterInput]);
videoWriterInput.expectsMediaDataInRealTime = YES;
[videoWriter addInput:videoWriterInput];
//Start a session:
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//convert uiimage to CGImage.
int frameCount = 1;
int kRecordingFPS = 30;
UIImage * im = [UIImage imageNamed:@"IMG_1650.JPG"];
CGAffineTransform transform = CGAffineTransformMakeRotation((M_PI/180)*90);
GPUImageTransformFilter * filter = [[GPUImageTransformFilter alloc]init];
[filter setAffineTransform:transform];
UIImage * i = [filter imageByFilteringImage:im];
i = [filter imageByFilteringImage:im];
NSArray * imageArray = [[NSArray alloc]initWithObjects:i,i,i,i,i,i,i,i,i,i,i,i,i,i,i,i, nil];
for(UIImage * img in imageArray)
{
buffer = [self pixelBufferFromCGImage:[img CGImage] andSize:size];
BOOL append_ok = NO;
int j = 0;
while (!append_ok && j < 30)
{
if (adaptor.assetWriterInput.readyForMoreMediaData)
{
printf("appending %d attemp %d\n", frameCount, j);
CMTime frameTime = CMTimeMake(frameCount,(int32_t) kRecordingFPS);
append_ok = [adaptor appendPixelBuffer:buffer withPresentationTime:frameTime];
if(buffer)
CVBufferRelease(buffer);
[NSThread sleepForTimeInterval:0.05];
}
else
{
printf("adaptor not ready %d, %d\n", frameCount, j);
[NSThread sleepForTimeInterval:0.1];
}
j++;
}
if (!append_ok) {
printf("error appending image %d times %d\n", frameCount, j);
}
frameCount++;
}
//Finish the session:
[videoWriterInput markAsFinished];
[videoWriter finishWriting];
NSLog(@"Write Ended");
}
我試圖檢查視頻是否兼容使用
UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(videoPath)
我發現視頻isn' T支持
,但我不知道爲什麼或如何解決這個
哇,這段代碼現在有點混亂....也許在SE:代碼審查的一段時間後,找到答案是必要的。 – CodaFi
檢查圖像分辨率,iDevices有相當有限的播放格式支持。 IMG_1650看起來像照相機照片文件,而iPad僅支持1080p h264。 –
THX @ A-Live 我用一個較小的替換圖像,它的工作 是不是有辦法超過這個? 還是必須調整我的所有圖像? –