startWriteWithCompletionHandler

-(void)startWriteWithCompletionHandler:(void(^)(NSString* path))complete andProgress:(void(^)(CGFloatprogress))progress

{

CMTimeduration = [self.assetduration];

CGFloattotalTime =CMTimeGetSeconds(duration);

dispatch_queue_tqueue =dispatch_queue_create("com.writequeue",DISPATCH_QUEUE_CONCURRENT);

__blockNSIntegercount =0;

__blockBOOLisCompleteVideo =NO;

__blockBOOLisCompleteAudio =NO;

//开启写入会话，并指定样本的开始时间

[_assetWritestartWriting];

[_assetWritestartSessionAtSourceTime:kCMTimeZero];

WS(weakSelf)

[_assetWriterInputVideorequestMediaDataWhenReadyOnQueue:queueusingBlock:^{

while(!isCompleteVideo && weakSelf.assetWriterInputVideo.readyForMoreMediaData)

{

@autoreleasepool{

CMSampleBufferRefbuffer = [weakSelf.assetReaderTrackOutputVideocopyNextSampleBuffer];

CMTimepresentTime =CMSampleBufferGetPresentationTimeStamp(buffer);

progress(CMTimeGetSeconds(presentTime)/totalTime);

CVPixelBufferRefpixelBuffer =CMSampleBufferGetImageBuffer(buffer);

CGFloatdiff = totalTime -CMTimeGetSeconds(presentTime);

CGFloatwidth =CVPixelBufferGetWidth(pixelBuffer);

CGFloatheight =CVPixelBufferGetHeight(pixelBuffer);

//if(weakSelf.needWatermark)

//{

//UIImage *overlayImage = [UIImage imageNamed:@"video_watermark"];

//

//CGColorSpaceRef cSpace = CGColorSpaceCreateDeviceRGB();

//

//CVPixelBufferLockBaseAddress( pixelBuffer, 0 );

//CGContextRef context = CGBitmapContextCreate(CVPixelBufferGetBaseAddress(pixelBuffer),

//width,

//height,

//8,

//CVPixelBufferGetBytesPerRow(pixelBuffer),

//CGColorSpaceCreateDeviceRGB(),

//(CGBitmapInfo)kCGBitmapByteOrder32Little |kCGImageAlphaPremultipliedFirst);

//

//

////视频大小360*640是录制的一半，所以标注也是一半。

////750*1334

//CGFloat waterWidth = width * 300.0f/750.0f;

//CGFloat waterHeight = waterWidth * 66.0f/300.0f;

//CGFloat waterRightMargin = width * 0.053f;

//CGFloat waterBottomMargin = height - width * 0.448f;

//CGRect renderBounds = CGRectMake(width - waterWidth - waterRightMargin, waterBottomMargin , waterWidth , waterHeight);

//CGContextDrawImage(context, renderBounds, [overlayImage CGImage]);

//

//if(diff < 3.0f)

//{

//NSInteger imageIndex = round(-35.0f/3.0f * diff + 35.0f);

//

//NSString * imageName = [NSString stringWithFormat:@"te%ld",imageIndex];

//

//UIImage *overlayImage = [UIImage imageNamed:imageName];

//

//CGRect renderBounds = CGRectMake(0, 0, width , height);

//CGContextDrawImage(context, renderBounds, [overlayImage CGImage]);

//

//CGContextDrawImage(context, renderBounds, [weakSelf.anchorInfoImage CGImage]);

//}

//

//CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);

//CGColorSpaceRelease(cSpace);

//

//}

//else if(diff < 3.0f)

//{

//NSInteger imageIndex = round(-35.0f/3.0f * diff + 35.0f);

//

//NSString * imageName = [NSString stringWithFormat:@"te%ld",imageIndex];

//UIImage *overlayImage = [UIImage imageNamed:imageName];

//

//CGColorSpaceRef cSpace = CGColorSpaceCreateDeviceRGB();

//

//CVPixelBufferLockBaseAddress( pixelBuffer, 0);

//CGContextRef context = CGBitmapContextCreate(CVPixelBufferGetBaseAddress(pixelBuffer),

//CVPixelBufferGetWidth(pixelBuffer),

//CVPixelBufferGetHeight(pixelBuffer),

//8,

//CVPixelBufferGetBytesPerRow(pixelBuffer),

//CGColorSpaceCreateDeviceRGB(),

//(CGBitmapInfo)kCGBitmapByteOrder32Little|kCGImageAlphaPremultipliedFirst);

//

//CGRect renderBounds = CGRectMake(0, 0, width , height);

//CGContextDrawImage(context, renderBounds, [overlayImage CGImage]);

//

//CGContextDrawImage(context, renderBounds, [[weakSelf anchorInfoImage] CGImage]);

//

//CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);

//CGColorSpaceRelease(cSpace);

//}

if(buffer && weakSelf.assetWriterInputVideo.readyForMoreMediaData) {

[weakSelf.assetWriterInputVideoappendSampleBuffer:buffer];

NSLog(@"%ld",++count);

CFRelease(buffer);

}

else

{

isCompleteVideo =YES;

if(isCompleteAudio)

{

[weakSelfcompleteWrite:complete];

}

}

}

}

}];

[_assetWriterInputAudiorequestMediaDataWhenReadyOnQueue:queueusingBlock:^{

while(!isCompleteAudio && weakSelf.assetWriterInputAudio.readyForMoreMediaData) {

CMSampleBufferRefbuffer = [weakSelf.assetReaderTrackOutputAudiocopyNextSampleBuffer];

if(buffer && weakSelf.assetWriterInputAudio.readyForMoreMediaData) {

[weakSelf.assetWriterInputAudioappendSampleBuffer:buffer];

}

else

{

isCompleteAudio =YES;

if(isCompleteVideo)

{

[weakSelfcompleteWrite:complete];

}

}

}

}];

}