请问如何添加水印

[XFoxer]

`- (void)setWaterMark
{
GPUImageAlphaBlendFilter *blendFilter = [[GPUImageAlphaBlendFilter alloc] init];
blendFilter.mix = 1.0;
NSDate *startTime = [NSDate date];

UILabel *timeLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, 240.0f, 320.0f)];
timeLabel.font = [UIFont systemFontOfSize:17.0f];
timeLabel.text = @"Time: 0.0 s";
timeLabel.textAlignment = NSTextAlignmentCenter;
timeLabel.backgroundColor = [UIColor clearColor];
timeLabel.textColor = [UIColor whiteColor];

GPUImageUIElement *uiElementInput = [[GPUImageUIElement alloc] initWithView:timeLabel];

[_filter addTarget:blendFilter];
[uiElementInput addTarget:blendFilter];

[blendFilter addTarget:_gpuImageView];

__unsafe_unretained GPUImageUIElement *weakUIElementInput = uiElementInput;
__weak typeof(self) _self = self;
[_filter setFrameProcessingCompletionBlock:^(GPUImageOutput * filter, CMTime frameTime){
    timeLabel.text = [NSString stringWithFormat:@"Time: %f s", -[startTime timeIntervalSinceNow]];
    [weakUIElementInput update];
    [_self processVideo:filter];
}];
[_videoCamera addTarget:_gpuImageView];

}`
这是我添加水印的代码 可是在[weakUIElementInput update] 这里崩溃

[XFoxer]

后续会出添加水印的功能么

[chenliming777]

这个一定会添加的，目前还在优化，稍等吧

[chenliming777]

这个你可以先参考GPUImage源码下的demo

[XFoxer]

我现在这个添加方法就是按照GPUImage里面的demo添加的 setWaterMark 是在setBeautyFace后面执行的 不知道问题出在哪里

[chenliming777]

这个稍等一下吧 这两天会提交的

[chenliming777]

水印这个接口已经加了，在master分支下。

[XFoxer]

刚才试了下 添加水印崩溃 输出
'Tried to overrelease a framebuffer, did you forget to call -useNextFrameForImageCapture before using -imageFromCurrentFramebuffer?'

[XFoxer]

CRASH: Tried to overrelease a framebuffer, did you forget to call -useNextFrameForImageCapture before using -imageFromCurrentFramebuffer?
0 CoreFoundation 0x0000000185704f74 + 148
1 libobjc.A.dylib 0x000000019abf3f80 objc_exception_throw + 56
2 CoreFoundation 0x0000000185704e2c + 0
3 Foundation 0x00000001865f3f3c + 112
4 bililive 0x0000000100430424 -[GPUImageFramebuffer unlock] + 312
5 bililive 0x00000001004718c0 -[GPUImageTwoInputFilter renderToTextureWithVertices:textureCoordinates:] + 1220
6 bililive 0x00000001004288dc -[GPUImageFilter newFrameReadyAtTime:atIndex:] + 144
7 bililive 0x000000010047214c -[GPUImageTwoInputFilter newFrameReadyAtTime:atIndex:] + 1204
8 bililive 0x000000010042637c -[GPUImageFilter informTargetsAboutNewFrameAtTime:] + 1500
9 bililive 0x0000000100428924 -[GPUImageFilter newFrameReadyAtTime:atIndex:] + 216
10 bililive 0x000000010042637c -[GPUImageFilter informTargetsAboutNewFrameAtTime:] + 1500
11 bililive 0x0000000100421ab0 -[GPUImageCropFilter newFrameReadyAtTime:atIndex:] + 152
12 bililive 0x0000000100479550 -[GPUImageVideoCamera updateTargetsForVideoCameraUsingCacheTextureAtWidth:height:time:] + 1740
13 bililive 0x0000000100479eac -[GPUImageVideoCamera processVideoSampleBuffer:] + 2200
14 bililive 0x000000010047aa88 __74-[GPUImageVideoCamera captureOutput:didOutputSampleBuffer:fromConnection:]_block_invoke + 176
15 libdispatch.dylib 0x00000001010add70 _dispatch_call_block_and_release + 24
16 libdispatch.dylib 0x00000001010add30 _dispatch_client_callout + 16
17 libdispatch.dylib 0x00000001010ba7f0 _dispatch_queue_drain + 1036
18 libdispatch.dylib 0x00000001010b1a20 _dispatch_queue_invoke + 464
19 libdispatch.dylib 0x00000001010bc908 _dispatch_root_queue_drain + 760
20 libdispatch.dylib 0x00000001010bc600 _dispatch_worker_thread3 + 132
21 libsystem_pthread.dylib 0x000000019b5f5478 _pthread_wqthread + 1092
22 libsystem_pthread.dylib 0x000000019b5f5028 start_wqthread + 4

[chenliming777]

调用这个接口试试，可以自己看源码，Master分支今天提交的

[XFoxer]

我调用的就是这个接口

[chenliming777]

你是自己实现的 不是用的我的源码是嘛，GPUImage里面有改动

[chenliming777]

我的demo是没有问题的，你测测看是不是你自己哪里出问题了，我这不好定位

[XFoxer]

好的 谢谢 我这边再看看

[chenliming777]

GPUImageUIElement这个里面update有改动，你可以看下