HI All,
I am attempting to write out an image as a movie well, it will be an array of
images but to start with I can't even get one in there. Any help diagnosing my
problem would be greatly appreciated.
Here is what I am doing:
//here is the image
NSString *path = [NSString
stringWithFormat:@"%@/images/0.png",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES) lastObject]];
NSData *imageData = [[[NSData alloc] initWithContentsOfFile:path] autorelease];
UIImage *uiimage = [UIImage imageWithData:imageData];
//configure the path for the output video
NSString *videoPath = [NSString
stringWithFormat:@"%@/videos/currentVideo.mov",[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES) lastObject]];
NSError *error = nil;
//create the writer
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:[NSURL
fileURLWithPath:videoPath] fileType:AVFileTypeQuickTimeMovie error:&error];
NSParameterAssert(videoWriter);
//setup the properties for the input
NSDictionary *videoSettings = [NSDictionary
dictionaryWithObjectsAndKeys:AVVideoCodecH264, AVVideoCodecKey,[NSNumber
numberWithInt:640], AVVideoWidthKey,[NSNumber numberWithInt:960],
AVVideoHeightKey,nil];
//create the input
AVAssetWriterInput* writerInput = [[AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSettings]
retain];
NSParameterAssert(writerInput);
NSParameterAssert([videoWriter canAddInput:writerInput]);
[videoWriter addInput:writerInput];
//configure the properties for the buffer and create the bufferAdaptor
NSDictionary *bufferAttributes = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kCVPixelFormatType_32BGRA],
kCVPixelBufferPixelFormatTypeKey, nil];
AVAssetWriterInputPixelBufferAdaptor *adaptor =
[AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInput
sourcePixelBufferAttributes:bufferAttributes];
//create the pixel buffer
CVPixelBufferRef pixelBuffer = NULL;
CGImageRef cgImage = CGImageCreateCopy([uiimage CGImage]);
CFDataRef image = CGDataProviderCopyData(CGImageGetDataProvider(cgImage));
int status = CVPixelBufferCreateWithBytes(NULL,
960,
640,
kCVPixelFormatType_32BGRA,
(void*)CFDataGetBytePtr(image),
CGImageGetBytesPerRow(cgImage),
NULL,
0,
NULL,
&pixelBuffer);
//write it out
[adaptor appendPixelBuffer:pixelBuffer withPresentationTime:CMTimeMake(2, 60)];
It crashes here reporting
*** Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: '***
-[AVAssetWriterInputPixelBufferAdaptor appendPixelBuffer:withPresentationTime:]
Cannot call method when status is 0'
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