iOS多张图片合成一个视频

来源：互联网发布：北二外hnd知乎编辑：程序博客网时间：2024/05/02 03:25
IOS多张图片合成一个视频
- (void)viewDidLoad  {     [superviewDidLoad];      //Do any additional setup after loading the view.     imageArr =[[NSMutableArrayalloc]initWithObjects:               [UIImageimageNamed:@"1"],[UIImageimageNamed:@"2.jpg"],[UIImageimageNamed:@"3.jpg"],[UIImageimageNamed:@"4.jpg"],[UIImageimageNamed:@"5.jpg"],[UIImageimageNamed:@"6.jpg"],[UIImageimageNamed:@"7.jpg"],[UIImageimageNamed:@"8.jpg"],[UIImageimageNamed:@"9.jpg"],[UIImageimageNamed:@"10.jpg"],[UIImageimageNamed:@"11.jpg"],[UIImageimageNamed:@"12.jpg"],[UIImageimageNamed:@"13.jpg"],[UIImageimageNamed:@"14.jpg"],[UIImageimageNamed:@"15"],[UIImageimageNamed:@"16"],[UIImageimageNamed:@"17"],[UIImageimageNamed:@"18"],[UIImageimageNamed:@"19"],[UIImageimageNamed:@"20"],[UIImageimageNamed:@"21"],[UIImageimageNamed:@"22"],[UIImageimageNamed:@"23"],[UIImageimageNamed:@"24"],[UIImageimageNamed:@"25"],[UIImageimageNamed:@"26"],[UIImageimageNamed:@"27"],[UIImageimageNamed:@"28"],[UIImageimageNamed:@"29"],[UIImageimageNamed:@"30"],[UIImageimageNamed:@"31"],nil];     UIButton * button =[UIButtonbuttonWithType:UIButtonTypeRoundedRect];      [buttonsetFrame:CGRectMake(100,100, 100,100)];     [buttonsetTitle:@"合成"forState:UIControlStateNormal];     [buttonaddTarget:selfaction:@selector(testCompressionSession)forControlEvents:UIControlEventTouchUpInside];     [self.viewaddSubview:button];     UIButton * button1 =[UIButtonbuttonWithType:UIButtonTypeRoundedRect];      [button1setFrame:CGRectMake(100,200, 100,100)];     [button1setTitle:@"播放"forState:UIControlStateNormal];     [button1addTarget:selfaction:@selector(playAction)forControlEvents:UIControlEventTouchUpInside];     [self.viewaddSubview:button1];  }  -(void)testCompressionSession  {     NSLog(@"开始");     //NSString *moviePath = [[NSBundle mainBundle]pathForResource:@"Movie" ofType:@"mov"];     NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);     NSString *moviePath =[[pathsobjectAtIndex:0]stringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.mov",@"test"]];     self.theVideoPath=moviePath;     CGSize size =CGSizeMake(320,400);//定义视频的大小  //    [selfwriteImages:imageArr ToMovieAtPath:moviePath withSize:sizeinDuration:4 byFPS:30];//第2中方法     NSError *error =nil;     unlink([moviePathUTF8String]);     NSLog(@"path->%@",moviePath);     //—-initialize compression engine     AVAssetWriter *videoWriter =[[AVAssetWriteralloc]initWithURL:[NSURLfileURLWithPath:moviePath]                                                   fileType:AVFileTypeQuickTimeMovie                                                     error:&error];     NSParameterAssert(videoWriter);     if(error)        NSLog(@"error =%@", [errorlocalizedDescription]);     NSDictionary *videoSettings =[NSDictionarydictionaryWithObjectsAndKeys:AVVideoCodecH264,AVVideoCodecKey,                               [NSNumbernumberWithInt:size.width],AVVideoWidthKey,                               [NSNumbernumberWithInt:size.height],AVVideoHeightKey,nil];     AVAssetWriterInput *writerInput =[AVAssetWriterInputassetWriterInputWithMediaType:AVMediaTypeVideooutputSettings:videoSettings];     NSDictionary*sourcePixelBufferAttributesDictionary =[NSDictionarydictionaryWithObjectsAndKeys:[NSNumbernumberWithInt:kCVPixelFormatType_32ARGB],kCVPixelBufferPixelFormatTypeKey,nil];     AVAssetWriterInputPixelBufferAdaptor *adaptor =[AVAssetWriterInputPixelBufferAdaptor                                              assetWriterInputPixelBufferAdaptorWithAssetWriterInput:writerInputsourcePixelBufferAttributes:sourcePixelBufferAttributesDictionary];     NSParameterAssert(writerInput);     NSParameterAssert([videoWritercanAddInput:writerInput]);     if ([videoWritercanAddInput:writerInput])        NSLog(@"11111");     else        NSLog(@"22222");      [videoWriteraddInput:writerInput];      [videoWriterstartWriting];     [videoWriterstartSessionAtSourceTime:kCMTimeZero];     //合成多张图片为一个视频文件     dispatch_queue_t dispatchQueue =dispatch_queue_create("mediaInputQueue",NULL);     int __block frame =0;     [writerInputrequestMediaDataWhenReadyOnQueue:dispatchQueueusingBlock:^{         while([writerInputisReadyForMoreMediaData])         {            if(++frame >=[imageArrcount]*10)             {                [writerInputmarkAsFinished];                [videoWriterfinishWriting];  //              [videoWriterfinishWritingWithCompletionHandler:nil];               break;             }            CVPixelBufferRef buffer =NULL;            int idx =frame/10;            NSLog(@"idx==%d",idx);             buffer =(CVPixelBufferRef)[selfpixelBufferFromCGImage:[[imageArrobjectAtIndex:idx]CGImage]size:size];            if (buffer)             {               if(![adaptorappendPixelBuffer:bufferwithPresentationTime:CMTimeMake(frame,10)])                  NSLog(@"FAIL");               else                  NSLog(@"OK");                  CFRelease(buffer);             }         }      }];  }  - (CVPixelBufferRef)pixelBufferFromCGImage:(CGImageRef)imagesize:(CGSize)size  {     NSDictionary *options =[NSDictionarydictionaryWithObjectsAndKeys:                          [NSNumbernumberWithBool:YES],kCVPixelBufferCGImageCompatibilityKey,                          [NSNumbernumberWithBool:YES],kCVPixelBufferCGBitmapContextCompatibilityKey,nil];     CVPixelBufferRef pxbuffer =NULL;     CVReturn status =CVPixelBufferCreate(kCFAllocatorDefault,size.width,size.height,kCVPixelFormatType_32ARGB,(__bridgeCFDictionaryRef) options,&pxbuffer);     NSParameterAssert(status ==kCVReturnSuccess && pxbuffer !=NULL);     CVPixelBufferLockBaseAddress(pxbuffer,0);     voidvoid *pxdata =CVPixelBufferGetBaseAddress(pxbuffer);     NSParameterAssert(pxdata !=NULL);     CGColorSpaceRef rgbColorSpace=CGColorSpaceCreateDeviceRGB();     CGContextRef context =CGBitmapContextCreate(pxdata,size.width,size.height,8,4*size.width,rgbColorSpace,kCGImageAlphaPremultipliedFirst);     NSParameterAssert(context);     CGContextDrawImage(context,CGRectMake(0,0,CGImageGetWidth(image),CGImageGetHeight(image)), image);     CGColorSpaceRelease(rgbColorSpace);     CGContextRelease(context);      CVPixelBufferUnlockBaseAddress(pxbuffer,0);      return pxbuffer;  }  -(void)playAction  {     MPMoviePlayerViewController *theMovie =[[MPMoviePlayerViewControlleralloc]initWithContentURL:[NSURLfileURLWithPath:self.theVideoPath]];     [selfpresentMoviePlayerViewControllerAnimated:theMovie];     theMovie.moviePlayer.movieSourceType=MPMovieSourceTypeFile;     [theMovie.moviePlayerplay];  }  //第二种方式  - (void)writeImages:(NSArray *)imagesArrayToMovieAtPath:(NSString *) pathwithSize:(CGSize) size          inDuration:(float)durationbyFPS:(int32_t)fps{     //Wire the writer:     NSError *error =nil;     AVAssetWriter *videoWriter =[[AVAssetWriteralloc]initWithURL:[NSURLfileURLWithPath:path]                                                    fileType:AVFileTypeQuickTimeMovie                                                      error:&error];     NSParameterAssert(videoWriter);     NSDictionary *videoSettings =[NSDictionarydictionaryWithObjectsAndKeys:                               AVVideoCodecH264,AVVideoCodecKey,                               [NSNumbernumberWithInt:size.width],AVVideoWidthKey,                               [NSNumbernumberWithInt:size.height],AVVideoHeightKey,                               nil nil];     AVAssetWriterInput* videoWriterInput =[AVAssetWriterInput                                       assetWriterInputWithMediaType:AVMediaTypeVideo                                       outputSettings:videoSettings];     AVAssetWriterInputPixelBufferAdaptor *adaptor =[AVAssetWriterInputPixelBufferAdaptor                                              assetWriterInputPixelBufferAdaptorWithAssetWriterInput:videoWriterInput                                              sourcePixelBufferAttributes:nil];     NSParameterAssert(videoWriterInput);     NSParameterAssert([videoWritercanAddInput:videoWriterInput]);      [videoWriteraddInput:videoWriterInput];     //Start a session:      [videoWriterstartWriting];     [videoWriterstartSessionAtSourceTime:kCMTimeZero];     //Write some samples:     CVPixelBufferRef buffer =NULL;     int frameCount =0;     int imagesCount = [imagesArraycount];     float averageTime =duration/imagesCount;     int averageFrame =(int)(averageTime * fps);     for(UIImage *img in imagesArray)      {         buffer=[selfpixelBufferFromCGImage:[imgCGImage]size:size];         BOOL append_ok =NO;         int j =0;         while (!append_ok&& j <</b> 30)         {            if(adaptor.assetWriterInput.readyForMoreMediaData)             {               printf("appending %d attemp%d\n", frameCount, j);               CMTime frameTime =CMTimeMake(frameCount,(int32_t)fps);                floatframeSeconds =CMTimeGetSeconds(frameTime);               NSLog(@"frameCount:%d,kRecordingFPS:%d,frameSeconds:%f",frameCount,fps,frameSeconds);                append_ok = [adaptorappendPixelBuffer:bufferwithPresentationTime:frameTime];               if(buffer)                   [NSThreadsleepForTimeInterval:0.05];             }            else             {               printf("adaptor not ready %d,%d\n", frameCount, j);               [NSThreadsleepForTimeInterval:0.1];             }            j++;         }         if (!append_ok){           printf("error appendingimage %d times %d\n", frameCount, j);         }         frameCount = frameCount + averageFrame;      }     //Finish the session:      [videoWriterInputmarkAsFinished];      [videoWriterfinishWriting];     NSLog(@"finishWriting");  }
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