将视频保存到iPhone库中的问题.
我有一个UI Images的阵列,和两个按钮,“convertToVideo”&“savetoiPhoneLib”
我有一个UI Images的阵列,和两个按钮,“convertToVideo”&“savetoiPhoneLib”
-(IBAction) convertToVideo
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES);
Nsstring *documentsDirectory = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
Nsstring *savedVideoPath = [documentsDirectory stringByAppendingPathComponent:@"videoOutput"];
printf(" \n\n\n-Video file == %s--\n\n\n",[savedVideoPath UTF8String]);
[self writeImageAsMovie:imageArray toPath:savedVideoPath size:self.view.frame.size duration:3];
}
here i'm passing the imageArray and savedVideoPath to the function below
-(void)writeImageAsMovie:(NSArray *)array toPath:(Nsstring*)path size:(CGSize)size duration:(int)duration
{
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* writerInput = [[AVAssetWriterInput
assetWriterInputWithMediaType:AVMediaTypeVideo
outputSettings:videoSettings] retain];
// NSDictionary *bufferAttributes = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:kCVPixelFormatType_32ARGB],kCVPixelBufferPixelFormatTypeKey,nil];
AVAssetWriterInputPixelBufferAdaptor *adaptor = [AVAssetWriterInputPixelBufferAdaptor
assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInput
sourcePixelBufferAttributes:nil];
NSParameterassert(writerInput);
NSParameterassert([videoWriter canAddInput:writerInput]);
[videoWriter addInput:writerInput];
//Start a session:
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:kCMTimeZero];
CVPixelBufferRef buffer = NULL;
//convert uiimage to CGImage.
buffer = [self pixelBufferFromCGImage:[[array objectAtIndex:0] CGImage]];
[adaptor appendPixelBuffer:buffer withPresentationTime:kCMTimeZero];
//Write samples:
......
//Finish the session:
[writerInput markAsFinished];
[videoWriter finishWriting];
}
generate a CVPixelBufferRef here
- (CVPixelBufferRef) pixelBufferFromCGImage: (CGImageRef) image
{
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES],kCVPixelBufferCGImageCompatibilityKey,[NSNumber numberWithBool:YES],kCVPixelBufferCGBitmapContextCompatibilityKey,nil];
CVPixelBufferRef pxbuffer = NULL;
CVReturn status = CVPixelBufferCreate(kcfAllocatorDefault,self.view.frame.size.width,self.view.frame.size.height,kCVPixelFormatType_32ARGB,(CFDictionaryRef) options,&pxbuffer);
NSParameterassert(status == kCVReturnSuccess && pxbuffer != NULL);
CVPixelBufferLockBaseAddress(pxbuffer,0);
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
NSParameterassert(pxdata != NULL);
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(pxdata,8,4*self.view.frame.size.width,rgbColorSpace,kCGImageAlphaNoneskipFirst);
NSParameterassert(context);
CGContextConcatCTM(context,CGAffineTransformMakeRotation(0));
CGContextDrawImage(context,CGRectMake(0,CGImageGetWidth(image),CGImageGetHeight(image)),image);
CGColorSpaceRelease(rgbColorSpace);
CGContextRelease(context);
CVPixelBufferUnlockBaseAddress(pxbuffer,0);
return pxbuffer;
}
保存到iPhone库
-(IBAction) savetoiPhoneLib { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,YES); Nsstring *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil; Nsstring *getimagePath = [basePath stringByAppendingPathComponent:@"videoOutput"]; printf(" \n\n\n-Video file == %s--\n\n\n",[getimagePath UTF8String]); UISaveVideoAtPathToSavedPhotosAlbum ( getimagePath,self,@selector(video:didFinishSavingWithError: contextInfo:),nil); } - (void) video: (Nsstring *) videoPath didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo { NSLog(@"Finished saving video with error: %@",error); }
但是当我保存我收到错误信息时：
完成保存视频,错误：错误域= ALAssetsLibraryErrorDomain代码= -3302“无效数据”UserInfo = 0x1d59f0 {NSLocalizedFailureReason =由于数据无效,无法查看或播放,因此写入此资产时出现问题,NSLocalizedRecoverySuggestion =尝试使用不同的数据,NSLocalizedDescription =无效数据}
请让我知道我的错误.提前致谢
解决方法
-(void)convertimagetoVideo { ///////////// setup OR function def if we move this to a separate function //////////// // this should be moved to its own function,that can take an imageArray,videoOutputPath,etc... NSError *error = nil; // set up file manager,and file videoOutputPath,remove "test_output.mp4" if it exists... //Nsstring *videoOutputPath = @"/Users/someuser/Desktop/test_output.mp4"; NSFileManager *fileMgr = [NSFileManager defaultManager]; Nsstring *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; Nsstring *videoOutputPath = [documentsDirectory stringByAppendingPathComponent:@"test_output.mp4"]; //NSLog(@"-->videoOutputPath= %@",videoOutputPath); // get rid of existing mp4 if exists... if ([fileMgr removeItemAtPath:videoOutputPath error:&error] != YES) NSLog(@"Unable to delete file: %@",[error localizedDescription]); CGSize imageSize = CGSizeMake(400,200); // NSUInteger fps = 30; NSUInteger fps = 30; //NSMutableArray *imageArray; //imageArray = [[NSMutableArray alloc] initWithObjects:@"download.jpeg",@"download2.jpeg",nil]; NSMutableArray *imageArray; NSArray* imagePaths = [[NSBundle mainBundle] pathsForResourcesOfType:@"png" inDirectory:nil]; imageArray = [[NSMutableArray alloc] initWithCapacity:imagePaths.count]; NSLog(@"-->imageArray.count= %i",imageArray.count); for (Nsstring* path in imagePaths) { [imageArray addobject:[UIImage imageWithContentsOfFile:path]]; //NSLog(@"-->image path= %@",path); } ////////////// end setup /////////////////////////////////// NSLog(@"Start building video from defined frames."); AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL: [NSURL fileURLWithPath:videoOutputPath] fileType:AVFileTypeQuickTimeMovie error:&error]; NSParameterassert(videoWriter); NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys: AVVideoCodecH264,[NSNumber numberWithInt:imageSize.width],[NSNumber numberWithInt:imageSize.height],nil]; AVAssetWriterInput* videoWriterInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:videoSettings]; 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 = 0; double numberOfSecondsPerFrame = 6; double frameDuration = fps * numberOfSecondsPerFrame; //for(VideoFrame * frm in imageArray) NSLog(@"**************************************************"); for(UIImage * img in imageArray) { //UIImage * img = frm._imageFrame; buffer = [self pixelBufferFromCGImage:[img CGImage]]; BOOL append_ok = NO; int j = 0; while (!append_ok && j < 30) { if (adaptor.assetWriterInput.readyForMoreMediaData) { //print out status: NSLog(@"Processing video frame (%d,%d)",frameCount,[imageArray count]); //CMTime frameTime = CMTimeMake((int64_t),(int32_t)2); CMTime frameTime = CMTimeMake(frameCount*frameDuration,(int32_t) fps); NSLog(@"seconds = %f,%u,%d",CMTimeGetSeconds(frameTime),fps,j); append_ok = [adaptor appendPixelBuffer:buffer withPresentationTime:frameTime]; if(!append_ok){ NSError *error = videoWriter.error; if(error!=nil) { NSLog(@"Unresolved error %@,%@.",error,[error userInfo]); } } } else { printf("adaptor not ready %d,%d\n",j); [NSThread sleepForTimeInterval:0.1]; } j++; } if (!append_ok) { printf("error appending image %d times %d\n,with error.",j); } frameCount++; } NSLog(@"**************************************************"); //Finish the session: [videoWriterInput markAsFinished]; [videoWriter finishWriting]; NSLog(@"Write Ended"); } -(void)CompileFilestomakeVideo { // set up file manager,remove "test_output.mp4" if it exists... //Nsstring *videoOutputPath = @"/Users/someuser/Desktop/test_output.mp4"; Nsstring *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; Nsstring *videoOutputPath = [documentsDirectory stringByAppendingPathComponent:@"test_output.mp4"]; //NSLog(@"-->videoOutputPath= %@",videoOutputPath); // get rid of existing mp4 if exists... AVMutableComposition* mixComposition = [AVMutableComposition composition]; Nsstring *bundleDirectory = [[NSBundle mainBundle] bundlePath]; // audio input file... Nsstring *audio_inputFilePath = [bundleDirectory stringByAppendingPathComponent:@"30secs.mp3"]; NSURL *audio_inputFileUrl = [NSURL fileURLWithPath:audio_inputFilePath]; // this is the video file that was just written above,full path to file is in --> videoOutputPath NSURL *video_inputFileUrl = [NSURL fileURLWithPath:videoOutputPath]; // create the final video output file as MOV file - may need to be MP4,but this works so far... Nsstring *outputFilePath = [documentsDirectory stringByAppendingPathComponent:@"final_video.mp4"]; NSURL *outputFileUrl = [NSURL fileURLWithPath:outputFilePath]; if ([[NSFileManager defaultManager] fileExistsAtPath:outputFilePath]) [[NSFileManager defaultManager] removeItemAtPath:outputFilePath error:nil]; CMTime nextClipStartTime = kCMTimeZero; AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:video_inputFileUrl options:nil]; CMTimeRange video_timeRange = CMTimeRangeMake(kCMTimeZero,videoAsset.duration); AVMutableCompositionTrack *a_compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; [a_compositionVideoTrack insertTimeRange:video_timeRange ofTrack:[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] atTime:nextClipStartTime error:nil]; //nextClipStartTime = CMTimeAdd(nextClipStartTime,a_timeRange.duration); AVURLAsset* audioAsset = [[AVURLAsset alloc]initWithURL:audio_inputFileUrl options:nil]; CMTimeRange audio_timeRange = CMTimeRangeMake(kCMTimeZero,audioAsset.duration); AVMutableCompositionTrack *b_compositionAudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid]; [b_compositionAudioTrack insertTimeRange:audio_timeRange ofTrack:[[audioAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:nextClipStartTime error:nil]; AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetHighestQuality]; _assetExport.outputFileType = @"com.apple.quicktime-movie"; //_assetExport.outputFileType = @"public.mpeg-4"; //NSLog(@"support file types= %@",[_assetExport supportedFileTypes]); _assetExport.outputURL = outputFileUrl; [_assetExport exportAsynchronouslyWithCompletionHandler: ^(void ) { [self saveVideoToAlbum:outputFilePath]; } ]; ///// THAT IS IT DONE... the final video file will be written here... NSLog(@"DONE.....outputFilePath--->%@",outputFilePath); // the final video file will be located somewhere like here: // /Users/caferrara/Library/Application Support/iPhone Simulator/6.0/Applications/D4B12FEE-E09C-4B12-B772-7F1BD6011BE1/Documents/outputFile.mov //////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////// } - (void) saveVideoToAlbum:(Nsstring*)path { NSLog(@"saveVideoToAlbum"); if(UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(path)){ UISaveVideoAtPathToSavedPhotosAlbum (path,nil); } } -(void) video:(Nsstring *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { if(error) NSLog(@"error: %@",error); else NSLog(@" OK"); } //////////////////////// - (CVPixelBufferRef) pixelBufferFromCGImage: (CGImageRef) image { CGSize size = CGSizeMake(400,200); NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:YES],size.width,size.height,(__bridge CFDictionaryRef) options,&pxbuffer); if (status != kCVReturnSuccess){ NSLog(@"Failed to create pixel buffer"); } CVPixelBufferLockBaseAddress(pxbuffer,0); void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer); CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(pxdata,4*size.width,kCGImageAlphaPremultipliedFirst); //kCGImageAlphaNoneskipFirst); CGContextConcatCTM(context,0); return pxbuffer; }
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。
