<Graphic images, animations, multimedia> Reading Notes-recording and editing videos

Use uiimagepickercontroller for recording

# Import "viewcontroller. H "# import <mobilecoreservices/mobilecoreservices. h> # import <quartzcore/quartzcore. h> @ interface viewcontroller () <uiimagepickercontrollerdelegate, response>-(ibaction) videorecod :( ID) sender; @ end @ implementation viewcontroller-(void) viewdidload {[Super viewdidload]; // do any additional setup after loading the view, typically from a nib .} -(void) didreceivem Emorywarning {[Super didreceivememorywarning]; // dispose of any resources that can be recreated .} -(ibaction) videorecod :( ID) sender {If ([uiimagepickercontroller issourcetypeavailable: available]) {uiimagepickercontroller * imagepickercontroller = [[uiimagepickercontroller alloc] init]; imagepickercontroller. delegate = self; imagepickercontroller. sourcetype = uiimagep Ickercontrollersourcetypecamera; imagepickercontroller. mediatypes = [[nsarray alloc] initwithobjects :( nsstring *) kuttypemovie, nil]; // sets the recording quality to imagepickercontroller. videoquality = uiimagepickercontrollerqualitytypehigh; // only 30 seconds of imagepickercontroller can be recorded. videomaximumduration = 30366f; [self presentviewcontroller: imagepickercontroller animated: Yes completion: Nil];} else {nslog (@ "camera unavailable. ") ;}}-(Void) Authorization: (uiimagepickercontroller *) picker {[self dismissviewcontrolleranimated: Yes completion: Nil];}-(void) imagepickercontroller: (uiimagepickercontroller *) picker didfinishpickingmediawithinfo: (nsdictionary *) info {nsurl * url = [info objectforkey: uiimagepickercontrollermediaurl]; nsstring * tempfilepath = [URL path]; If (partial Avedphotosalbum (tempfilepath) {// video: didfinishsavingwitherror: contextinfo: the callback must be saved as this type (tempfilepath, self, @ selector (Video: didfinishsavingwitherror: contextinfo :), (_ bridge void *) (tempfilepath);} [self dismissviewcontrolleranimated: Yes completion: Nil];}-(void) Video :( nsstring *) videopath didfinishsavingwitherror :( nserror *) error contextinfo :( nsstring *) c Ontextinfo {nsstring * Title; nsstring * message; If (! Error) {Title = @ "video save"; message = @ "the video has been saved to the camera film of the device";} else {Title = @ "video failed "; message = [error description];} uialertview * Alert = [[uialertview alloc] initwithtitle: Title message: Message delegate: Nil cancelbuttontitle: @ "OK" otherbuttontitles: Nil]; [alert show];}-(void) navigationcontroller :( uinavigationcontroller *) navigationcontroller willshowviewcontroller :( uiviewcontroller *) viewcontroller Animated :( bool) animated {nslog (@ "selector will be displayed. ");}-(Void) navigationcontroller :( uinavigationcontroller *) navigationcontroller didshowviewcontroller :( uiviewcontroller *) viewcontroller animated :( bool) animated {nslog (@" the selector ends. ");}

Use avfoundation

Avcapturesession: capture sessions to capture data from the camera and microphone. The avcapturesession object must be used to coordinate input and output data.

Avcapturedevice: capture device, which indicates entering a device, such as a camera and a microphone.

Avcapturedeviceinput: capture an input data source of a session

Avcaptureoutput captures an output target of a session, such as the output video file and static image.

Avcapturemoviefileoutput is a subclass of avcaptureoutput. It can be used to output captured data to a QuickTime video file (mov)

Avcapturevideopreviewlayer is a subclass of calayer that can be used to display recorded videos.

Avcaptureconnection: capture a connection. It is a connection between input and output in a capture session.

# Import "viewcontroller. H "# import <avfoundation/avfoundation. h> # import <assetslibrary/assetslibrary. h> @ interface viewcontroller () <strong> {bool isrecording;} @ property (weak, nonatomic) iboutlet uilabel * label; @ property (weak, nonatomic) iboutlet uibutton * button; @ property (strong, nonatomic) avcapturesession * session; @ property (strong, nonatomic) avcapturemoviefileou Tput * output;-(ibaction) recordpressed :( ID) sender; @ end @ implementation viewcontroller-(void) viewdidload {[Super viewdidload]; self. session = [[avcapturesession alloc] init]; self. session. sessionpreset = response; avcapturedevice * cameradevice = [avcapturedevice failed: avmediatypevideo]; nserror * error = nil; avcapturedeviceinput * camera = [avcapturedevicdevicp Ut deviceinputwithdevice: cameradevice error: & error]; avcapturedevice * micdevice = [avcapturedevice failed: Failed]; avcapturedeviceinput * MIC = [cannot deviceinputwithdevice: micdevice error: & error]; if (error |! Camera |! MIC) {nslog (@ "input error");} else {// Add the captured audio and video [self. session addinput: Camera]; [self. session addinput: MIC];} self. output = [[avcapturemoviefileoutput alloc] init]; If ([self. session canaddoutput: Self. output]) {[self. session addoutput: Self. output]; // output} avcapturevideopreviewlayer * previewlayer = [avcapturevideopreviewlayer layerwithsession: Self. session]; previewlayer. frame = cgrectmake (0, 0, se Lf. view. frame. size. width, self. view. frame. size. height); [self. view. layer insertsublayer: previewlayer atindex: 0]; [self. session startrunning]; isrecording = no; self. label. TEXT = @ "";}-(void) didreceivememorywarning {[Super success];}-(void) viewwillappear :( bool) animated {[Super viewwillappear: animated]; If (! [Self. session isrunning]) {[self. session startrunning] ;}}- (void) viewwilldisappear :( bool) animated {[Super viewwilldisappear: animated]; If ([self. session isrunning]) {[self. session stoprunning] ;}}- (ibaction) recordpressed :( ID) sender {If (! Isrecording) {[self. button settitle: @ "stop" forstate: uicontrolstatenormal]; self. label. TEXT = @ "recording... "; isrecording = yes; nsurl * fileurl = [self fileurl]; [self. output startrecordingtooutputfileurl: fileurl recordingdelegate: Self];} else {[self. button settitle: @ "Recording" forstate: uicontrolstatenormal]; self. label. TEXT = @ "stop"; [self. output stoprecording]; isrecording = no;}-(nsurl *) fileurl {nsstr Ing * outputpath = [[nsstring alloc] initwithformat: @ "% @", nstemporarydirectory (), @ "movie. mov "]; nsurl * outputurl = [[nsurl alloc] initfileurlwithpath: outputpath]; nsfilemanager * manager = [[nsfilemanager alloc] init]; If ([Manager fileexistsatpath: outputpath]) {[Manager removeitematpath: outputpath error: Nil];} return outputurl;} # pragma mark -- avcapturefileoutputrecordingdelegate delegate protocol implementation-(voi D) captureoutput :( avcapturefileoutput *) captureoutput didfinishrecordingtooutputfileaturl :( nsurl *) outputfileurl fromconnections :( nsarray *) connections error :( nserror *) error {If (error = nil) {alassetslibrary * library = [[alassetslibrary alloc] init]; [library writevideoatpathtosavedphotosalbum: outputfileurl completionblock: ^ (nsurl * asseturl, nserror * error) {If (error) {nslog (@ "write error. ") ;}}] ;}}

Use uivideoeditorcontroller

# Import "viewcontroller. H "@ interface viewcontroller () <uivideoeditorcontrollerdelegate, response>-(ibaction) editbuttonpress :( ID) sender; @ end @ implementation viewcontroller-(void) viewdidload {[Super viewdidload]; // do any additional setup after loading the view, typically from a nib .} -(void) didreceivememorywarning {[Super didreceivemorywarning]; // dispose of any resources th At can be recreated .} -(ibaction) editbuttonpress :( ID) sender {nsbundle * bundle = [nsbundle mainbundle]; nsstring * moviepath = [bundle pathforresource: @ "YY" oftype: @ "MP4"]; // determine whether the device supports video editing. If ([uivideoeditorcontroller caneditvideoatpath: moviepath]) {uivideoeditorcontroller * videoeditor = [[uivideoeditorcontroller alloc] init]; videoeditor. delegate = self; videoeditor. videopath = moviepath; [self pres Entviewcontroller: videoeditor animated: Yes completion: NULL];} else {nslog (@ "Cannot edit this video") ;}}-(void) videoeditorcontroller :( uivideoeditorcontroller *) editor didsaveeditedvideotopath :( nsstring *) editedvideopath {[Editor dismissviewcontrolleranimated: Yes completion: NULL]; If (Response (editedvideopath) {response (editedvideopath, self, @ Selector (Video: Audio: contextinfo :), (_ bridge void *) (editedvideopath) ;}- (void) videoeditorcontroller :( uivideoeditorcontroller *) Editor didfailwitherror :( nserror *) error {nslog (@ "video error editing"); nslog (@ "video editor error occurred = % @", error); [Editor dismissviewcontrolleranimated: Yes completion: NULL];} -(void) videoeditorcontrollerdidcancel :( uivideoeditorcontroller *) Editor {n Slog (@ "video edit canceled"); [Editor dismissviewcontrolleranimated: Yes completion: NULL];}-(void) Video :( nsstring *) videopathdidfinishsavingwitherror :( nserror *) error contextinfo :( nsstring *) contextinfo {nsstring * Title; nsstring * message; If (! Error) {Title = @ "video save"; message = @ "the video has been saved to the camera film of the device";} else {Title = @ "video failed "; message = [error description];} uialertview * Alert = [[uialertview alloc] initwithtitle: Title message: Message delegate: Nil cancelbuttontitle: @ "OK" otherbuttontitles: Nil]; [alert show];}

My personal comments: in fact, I have done video before, and there are similar articles. I can find better and more technical Code and articles on some foreign websites, but in short, it's a learning record ~

Original book: http://item.jd.com/11522516.html

<Graphic images, animations, multimedia> Reading Notes-recording and editing videos