IOS Video Development

MediaPlayer Framework

To play a movie file:

You can use MPMoviePlayerController to play movie files in the IOS SDK. However, there are strict formatting requirements for playing movie files on iOS devices, and only movie files in the following two formats can be played.

? H. 3.0 (Baseline profile)
? MPEG-4 Part 2 Video

Fortunately, you can use itunes to convert your files to the top two formats first.
MPMoviePlayerController can also play video files on the Internet. However, it is recommended that you download the video file locally and then play it. If you do not do this, iOS may refuse to play a very large video file.

This class is defined in the MediaPlayer framework. In your application, add this reference first, and then modify the Mediaplayerviewcontroller. H file.

#import   <</span>MediaPlayer/MediaPlayer.h>
@interface Mediaplayerviewcontroller:uiviewcontroller <</span>avaudioplayerdelegate>
{
MPMoviePlayerController  *movieplayer;

Below we use this class to play a video file in. m4v format. Similar to the previous one, a URL path is required.

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- (ID) init
{
Self  =  [super Initwithnibname:@ "mediaplayerviewcontroller"  Bundle:nil];
if (self) {

NSString  *moviepath  =  [[NSBundle Mainbundle] Pathforresource: @" Layers " 
OfType:@ "m4v"];
if (Moviepath) {
Nsurl  *movieurl  =  [Nsurl Fileurlwithpath:moviepath];
MoviePlayer  =  [[MPMoviePlayerController alloc]
Initwithcontenturl:movieurl];
}

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MPMoviePlayerController has a view to show the player controls, and we'll show this player in the Viewdidload method.

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- (void) viewdidload
{
[Self view] addsubview:[movieplayer view];
float Halfheight = [self view] bounds].size.height /   2.0;
float width = [self view] bounds].size.width;
[[MoviePlayer View] Setframe:cgrectmake (0, halfheight, Width, halfheight)];
}

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There is also a Mpmovieplayerviewcontroller class for playing video files in full-screen, with the same usage as MPMoviePlayerController.

Mpmovieplayerviewcontroller * Playerviewcontroller =
[[Mpmovieplayerviewcontroller alloc] initwithcontenturl:movieurl];
[Viewcontroller Presentmovieplayerviewcontrolleranimated:playerviewcontroller];

When we listen to music, we can do other things with the iphone, this time we need the player to run in the background, we just need to make a simple setup in the application.

1, add a Required background modes node in the Info property list, it is an array, set the first item to set the app plays audio.

2. Add the following code to the code that plays MP3:

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if (Musicpath) {
Nsurl  *musicurl  =  [Nsurl Fileurlwithpath:musicpath];
[[Avaudiosession Sharedinstance]
Setcategory:avaudiosessioncategoryplayback Error:nil];
Audioplayer  =  [[Avaudioplayer alloc] Initwithcontentsofurl:musicurl
Error:nil];
[Audioplayer setdelegate:self];
}

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The ability to play music in the background is not visible in the simulator, only on the real machine.

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