Multimedia technology-Improve your app's grid! A

1. Video playback
2. Video capture
3. Video recording
4. Video compression

1. Video playback 1.1 related two frames: iOS8.0 MediaPlayer iOS9.0 avfoundation 1.2 Play mode IOS 8.0

• Mpmovieplayerviewcontroller with views
• Ignoring the mpmovieplayercontroller of the graph

IOS 9.0

• Avplayerviewcontroller

1.3 Mpmovieplayerviewcontroller

Mpmovieplayerviewcontroller steps to implement playback Get Resource Path Initializing the player To play present

1.4 MPMoviePlayerController

MPMoviePlayerController steps to implement playback Get Resource Path Initializing the player Add the player view to the view of the current controller and set the frame Ready to play, start playing Next song Note: The player needs a strong reference

MPMoviePlayerController the current controller must set a strong reference to the player to set the player's style ControlStyle Mpmoviecontrolstylenone//The button without controller is None mpmoviecontrolstyleembedded//embedded, and is the default Mpmoviecontrolstylefullscreen//Full screen style Mpmoviecontrolstyledefault = mpmoviecontrolstyleembedded//Default Style

1.5 Avplayerviewcontroller Two frames: Avfoundation and Avkit

Playback steps Get Resource Path Initializing the player Add the PLAYERVC view to the current controller's view and set frame or present out PLAYERVC Start playback

1.6 Play the next song

Play the next song Implementation method: Notification The received notification key Mpmovieplayerplaybackdidfinishreasonuserinfokey, the returned data is the reason for the end of Mpmoviefinishreason (nsnumber) playback, mpmoviefinishreasonplaybackended Playback End Mpmoviefinishreasonplaybackerror Playback Error mpmoviefinishreasonuserexited User exit Determine if the video is a normal end play, and determine how the reason ends Set contentURL To play

Comparison of 1.7 MPMoviePlayerController and Mpmovieplayerviewcontroller

Common Can play the video Play the next song with notification implementation

Similarities and differences. Mpmovieplayerviewcontroller with the view of the playback controller, and is full-screen display, MPMoviePlayerController ignoring the diagram, you need to add to the current controller view and set the frame MPMoviePlayerController usage Scenario: Circle of Friends The controller must have a strong reference to the MPMoviePlayerController when it is used Cause: MPMoviePlayerController disappears after Alloc init after the Viewdidload method, so the controller must have a strong reference to it MPMoviePlayerController can be set ControlStyle Playback in different ways: Mpmovieplayerviewcontroller needs present. MPMoviePlayerController Call Play Play

2. Video interception related frame: Avfoundationavassetimage

Get Resource Path Packaging Avasset Create a avassetimagegenerator for the collector Intercept

Struct is the difference between uiimage and cgimageref that cannot be placed in an array?

3. Video recording update in 4. Video Compression update

Multimedia technology-Improve your app's grid! A