xcode - SampleBufferDelegate is not Working -

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for odd reason avcapturevideodataoutputsamplebufferdelegate isn't triggering. i've added delegate , everything, i'm not sure why isn't being ran in code. can me figure out why?

delegates in .h

@class avplayer; @class avplayerclass;  @interface camera : uiviewcontroller <uiimagepickercontrollerdelegate, uinavigationcontrollerdelegate, avcapturevideodataoutputsamplebufferdelegate,  avcapturefileoutputrecordingdelegate> {

.m code (initializecamera being called in viewdidload)

     -(void)initializecamera {   session = [[avcapturesession alloc]init]; [session setsessionpreset:avcapturesessionpresetphoto];    avcapturedevice *audiocapturedevice = [avcapturedevice defaultdevicewithmediatype:avmediatypeaudio]; nserror *error = nil; avcapturedeviceinput *audioinput = [avcapturedeviceinput deviceinputwithdevice:audiocapturedevice error:&error];  [session addinput:audioinput];  // preview layer***************  avcapturevideopreviewlayer *previewlayer = [[avcapturevideopreviewlayer alloc]initwithsession:session]; [previewlayer setvideogravity:avlayervideogravityresizeaspectfill]; calayer *rootlayer = [[self view] layer]; [rootlayer setmaskstobounds:yes]; cgrect frame = self.cameraview.frame;  [previewlayer setframe:frame];  [rootlayer insertsublayer:previewlayer atindex:0];    [session beginconfiguration];  //remove existing input [session removeinput:newvideoinput];  newcamera = [self camerawithposition:avcapturedevicepositionback]; // frontcamera = no;   [session setsessionpreset:avcapturesessionpresethigh]; if ([session cansetsessionpreset:avcapturesessionpreset1920x1080])      //check size based configs supported before setting them     [session setsessionpreset:avcapturesessionpreset1920x1080];    //add input session nserror *err = nil; newvideoinput = [[avcapturedeviceinput alloc] initwithdevice:newcamera error:&err]; if(!newvideoinput || err) {     nslog(@"error creating capture device input: %@", err.localizeddescription); } else if ([session canaddinput:newvideoinput]) {     [session addinput:newvideoinput]; } [session commitconfiguration];    stillimageoutput = [[avcapturestillimageoutput alloc]init]; nsdictionary *outputsettings = [[nsdictionary alloc] initwithobjectsandkeys:avvideocodecjpeg, avvideocodeckey, nil]; [stillimageoutput setoutputsettings:outputsettings];  [session addoutput:stillimageoutput];   moviefileoutput = [[avcapturemoviefileoutput alloc]init]; float64 totalseconds = 10;  int32_t preferredtimescale = 60;  cmtime maxduration = cmtimemakewithseconds(totalseconds, preferredtimescale); moviefileoutput.maxrecordedduration = maxduration; moviefileoutput.minfreediskspacelimit = 1024 * 1024;   if ([session canaddoutput:moviefileoutput])     [session addoutput:moviefileoutput];       // create videodataoutput , add session  //    avcapturevideodataoutput *output = [[avcapturevideodataoutput alloc] init]; // //    [session addoutput:output]; // //    // configure output. // //    dispatch_queue_t queue = dispatch_get_main_queue(); // //    [output setsamplebufferdelegate:self queue:queue]; // //  //  dispatch_release(queue); // //    // specify pixel format // //    output.videosettings = [nsdictionary dictionarywithobject: // //     [nsnumber numberwithint:kcvpixelformattype_32bgra] // //                                forkey:(id)kcvpixelbufferpixelformattypekey]; // // // // //    //    avcapturevideodataoutput *dataoutput = [[avcapturevideodataoutput alloc] init]; // //    [dataoutput setalwaysdiscardslatevideoframes:yes]; //    [dataoutput setvideosettings:[nsdictionary  dictionarywithobject:[nsnumber numberwithint:kcvpixelformattype_32bgra] //                                                              forkey:(id)kcvpixelbufferpixelformattypekey]]; //    [dataoutput setsamplebufferdelegate:self queue:dispatch_get_main_queue()]; // //    if ([session canaddoutput:dataoutput]) //        [session addoutput:dataoutput];  // sessionに追加   // [self setupvideooutput];  [session setsessionpreset:avcapturesessionpresethigh]; if ([session cansetsessionpreset:avcapturesessionpreset1920x1080])      //check size based configs supported before setting them     [session setsessionpreset:avcapturesessionpreset1920x1080];    [session startrunning];   }  -(void)captureoutput:(avcaptureoutput *)captureoutput didoutputsamplebuffer:(cmsamplebufferref )samplebuffer fromconnection:(avcaptureconnection *)connections {  nslog(@"buff");  pixelbuffer = (cvpixelbufferref)cmsamplebuffergetimagebuffer(samplebuffer);  videobuffer = pixelbuffer;  }     -(void)captureoutput:(avcaptureoutput *)captureoutput diddropsamplebuffer:(cmsamplebufferref)samplebuffer fromconnection:(avcaptureconnection *)connection {   nslog(@"the drop");  }

my code isn't triggering avcapturevideodataoutputsamplebufferdelegate because using avcapturemoviefileoutput instead of avcapturevideodataoutput. avcapturemoviefileoutput apparently not use sample buffers. how set avcapturevideodataoutput correctly use sample buffers post code. hope helps somebody.


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