iphone - Can't Capture AVCaptureVideoPreviewLayer -

-

in app opening video preview layer code:

    avcapturedeviceinput *captureinput = [avcapturedeviceinput                                        deviceinputwithdevice:[avcapturedevice defaultdevicewithmediatype:avmediatypevideo]                                        error:nil]; /*we setupt output*/ avcapturevideodataoutput *captureoutput = [[avcapturevideodataoutput alloc] init];   captureoutput.alwaysdiscardslatevideoframes = yes;   dispatch_queue_t queue; queue = dispatch_queue_create("cameraqueue", null); [captureoutput setsamplebufferdelegate:self queue:queue]; dispatch_release(queue); nsstring* key = (nsstring*)kcvpixelbufferpixelformattypekey;  nsnumber* value = [nsnumber numberwithunsignedint:kcvpixelformattype_32bgra];  nsdictionary* videosettings = [nsdictionary dictionarywithobject:value forkey:key];  [captureoutput setvideosettings:videosettings];   self.capturesession = [[avcapturesession alloc] init]; [self.capturesession addinput:captureinput]; [self.capturesession addoutput:captureoutput]; /*we use medium quality, ont iphone 4 demo laging much, conversion in uiimage , cgimage demands ressources 720p resolution.*/ [self.capturesession setsessionpreset:avcapturesessionpresetmedium];    cgrect vframe; vframe = cgrectmake(self.viewno2.frame.origin.x, self.viewno2.frame.origin.y, self.viewno2.frame.size.width, self.viewno2.frame.size.height);       /*we add custom layer (we need change orientation of layer video displayed correctly)*/ self.customlayer = [calayer layer]; self.customlayer.frame = vframe; self.customlayer.contentsgravity = kcagravityresizeaspect; [self.view.layer addsublayer:self.customlayer];   cgrect vframe1; vframe1 = cgrectmake(self.viewno3.frame.origin.x, self.viewno3.frame.origin.y, self.viewno3.frame.size.width, self.viewno3.frame.size.height);     /*we add custom layer (we need change orientation of layer video displayed correctly)*/ self.customlayer1 = [calayer layer]; self.customlayer1.frame = vframe1; self.customlayer1.contentsgravity = kcagravityresizeaspect; [self.view.layer addsublayer:self.customlayer1];    ///*we add imageview*/ //self.imageview = [[uiimageview alloc] init]; //self.imageview.frame = cgrectmake(9, 9, 137, 441); //[self.view addsubview:self.imageview]; /*we add preview layer*/   cgrect vframe2; vframe2 = cgrectmake(self.viewno1.frame.origin.x, self.viewno1.frame.origin.y, self.viewno1.frame.size.width, self.viewno1.frame.size.height);     self.prevlayer = [avcapturevideopreviewlayer layerwithsession: self.capturesession]; self.prevlayer.frame = vframe2;  self.prevlayer.videogravity = avlayervideogravityresizeaspectfill; [self.view.layer addsublayer: self.prevlayer]; /*we start capture*/ [self.capturesession startrunning];

when trying capture screen method:

-(ibaction)photo{  cgrect rect = [self.view bounds]; uigraphicsbeginimagecontextwithoptions(rect.size,yes,0.0f); cgcontextref context = uigraphicsgetcurrentcontext(); [self.view.layer renderincontext:context];    uiimage *viewimage = uigraphicsgetimagefromcurrentimagecontext(); uigraphicsendimagecontext(); uiimagewritetosavedphotosalbum(viewimage, nil, nil, nil);}

the prevlayer isn't being captured, missing something?

avcapturevideopreviewlayer not respond capturing screen uigraphicsgetimagefromcurrentimagecontext(). it's strange rule apple has done. way current screen image tap image data buffer avcaptureinput. can manually added onto screenshot.


Comments

Post a Comment

Popular posts from this blog

c# - SVN Error : "svnadmin: E205000: Too many arguments" -

-
i trying reposotries using c# code process svncommand = null; var psi = new processstartinfo("svnadmin"); psi.redirectstandardoutput = true; psi.redirectstandarderror = true; psi.useshellexecute = false; psi.arguments= @"dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump"; using (svncommand = process.start(psi)) { var myoutput = svncommand.standardoutput; var myerror = svncommand.standarderror; debug.write("output :" + environment.newline + environment.newline + myoutput.readtoend() + environment.newline + "error :" + environment.newline + environment.newline + myerror.readtoend()); svncommand.close(); } when use dump command commandline svnadmin dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump it works fine when try ...
Read more

c# - Copy ObservableCollection to another ObservableCollection -

-
how copy observablecollection item observablecollection without reference of first collection? here observablecollection item value changes affecting both collections. code private observablecollection<ratemodel> _allmetalrate = new observablecollection<ratemodel>(); private observablecollection<ratemodel> _metalrateondate = new observablecollection<ratemodel>(); public observablecollection<ratemodel> allmetalrate { { return this._allmetalrate; } set { this._allmetalrate = value; notifypropertychanged("metalrate"); } } public observablecollection<ratemodel> metalrateondate { { return this._metalrateondate; } set { this._metalrateondate = value; notifypropertychanged("metalrateondate"); } } foreach (var item in metalrateondate) allmetalrate.add(item); what causing , how can solve it? you need clone object referenced item before it's a...
Read more

All overlapping substrings matching a java regex -

-
is there api method returns (possibly overlapping) substrings match regular expression? for example, have text string: string t = 04/31 412-555-1235; , , have pattern: pattern p = new pattern("\\d\\d+"); matches strings of 2 or more characters. the matches are: 04, 31, 412, 555, 1235. how overlapping matches? i want code return: 04, 31, 41, 412, 12, 55, 555, 55, 12, 123, 1235, 23, 235, 35. theoretically should possible -- there obvious o(n^2) algorithm enumerates , checks substrings against pattern. edit rather enumerating substrings, safer use region(int start, int end) method in matcher . checking pattern against separate, extracted substring might change result of match (e.g. if there non-capturing group or word boundary check @ start/end of pattern). edit 2 actually, it's unclear whether region() expect zero-width matches. specification vague, , experiments yield disappointing results. for example: string line = "xx90xx"; strin...
Read more