I'm having trouble understanding this class and getting it to work properly, here is the piece of code where I use it:
MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:_videoURL];
UIImage *videoThumbnail = [moviePlayer thumbnailImageAtTime:0 timeOption:MPMovieTimeOptionNearestKeyFrame];
[lastImageView setImage:videoThumbnail];
[moviePlayer setControlStyle:MPMovieControlStyleNone];
[moviePlayer setShouldAutoplay:YES];
[moviePlayer prepareToPlay];
[moviePlayer.view setFrame:lastImageView.frame];
moviePlayer.view.transform = CGAffineTransformMakeRotation((90*M_PI)/180);
[self.view addSubview:moviePlayer.view];
[moviePlayer play];
The only reason why the videoThumbnail line is still there is because i didn't get the video to play until I was just trying it out to see if it would get the image from there and then it suddenly began to work... sort of.
Now it plays for 2-3 secs and then terminates without sending MPMoviePlayerPlaybackDidFinishNotification or MPMoviePlayerPlaybackStateDidChangeNotification
I googled around a bit and couldn't find any useful tips, could someone tell me what's wrong or what i am forgetting
If you're not assigning the newly created MPMoviePlayerController instance to anything other than a variable with local scope (moviePlayer), then the movie player will be deallocated before the movie gets playing. (I imagine the thumbnailImageAtTime call keeps it around for a bit longer.)
Try assigning the movie player instance to a retained (strong) instance variable or property. Of course it should be released when finished, as multiple movie player instances don't play well together.
Also, note that, as of iOS 5, calling prepareToPlay is required. The following is from chapter 28 of Matt Neuberg's Programming iOS 5, Second Edition:
Before you can display a movie in your interface with an MPMoviePlayerController, you must call prepareToPlay, which is supplied through the MPMediaPlayer protocol (adopted by MPMoviePlayerController). This requirement is new in iOS 5, and is a major difference from previous versions of the system; your old code can break if it didn’t make this call.
Related
I'm working on a test application that will run an mp4 file from internet.
code is :
-(IBAction)playRemoteVideo
{
NSString *mp4File = #"http://archive.org/download/Pbtestfilemp4videotestmp4/video_test_512kb.mp4";
MPMoviePlayerViewController *playerController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:mp4File]];
[self presentMoviePlayerViewControllerAnimated:playerController];
playerController.moviePlayer.movieSourceType=MPMovieSourceTypeStreaming;
[playerController.moviePlayer play];
[playerController release];
playerController=nil;
}
When I run the application and played the video the player tries to load the video for a while but after I got this exception on console
2012-04-18 22:45:11.309 VideoPlayer[891:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'An AVPlayerItem can occupy only one position in a player's queue at a time.'
*** First throw call stack:
(0x1df1052 0x1333d0a 0x27cfb31 0x27cbb2a 0x27e45cc 0x103b73 0xd4e6a 0x2ff2445 0x2ff44f0 0x1d28833 0x1d27db4 0x1d27ccb 0x16d8879 0x16d893e 0x24ea9b 0x1d12 0x1c85)
terminate called throwing an exception(gdb)
If I execute the same code with an m3u8 file , for instance;
http://devimages.apple.com/iphone/samples/bipbop/gear1/prog_index.m3u8
I can get the video running but same does not work for mp4 file.
Do you have any idea why I got this exception and what's wrong with my code?
I run the application on Iphone simulator and I have XCode 4.2
Best Regards
Tugrul
Set the movie player's control style like so.
[self.mPlayer.moviePlayer setControlStyle:MPMovieControlStyleDefault];
Also, local files have the MPMovieSourceTypeFile, not MPMovieSourceTypeStreaming property set.
One more scenario where this can happen is, as the log quite helpfully tells you, when "An AVPlayerItem can occupy only one position in a player's queue at a time." Basically, when you're trying to get two videos to start playing at the same time, or even INTERACT with two videos/MPMoviePlayerController objects at the same time.
In my app I use two MPMoviePlayerController's and keep swapping them around to create the illusion for the user of infinitely moving and swapping between different videos.
This was working fine so far, but I recently added notifications for some events that should result in the videos being paused and resumed. However I didn't realize both my player objects were listening to the notifications at the same time, and hence tried to trigger either "Pause" or "Play" at the same time. This caused the framework to think I was trying to play multiple videos at the same time, and threw this exception.
All I had to do now was make sure that only one player object was listening to notifications at any given point. Just a small tweak in my application logic.
So if you're getting a weird error, it need not be the framework that has a problem, a malicious operating system bent on making your life hell or an act of god. It could just be pure, good old-fashioned bad code. :)
I know this error. Try this code here.
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL: url];
self.movieController = player;
self.movieController.fullscreen = YES;
self.movieController.controlStyle = MPMovieControlStyleDefault;
// Register to receive a notification when the movie has finished playing.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:self.movieController];
// Register to receive a notification when the movie has finished playing.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerDidExitFullscreenNotification
object:self.movieController];
[self.movieController prepareToPlay];
[self.movieController.view setFrame: self.view.bounds]; // player's frame must match parent's
[self.view addSubview: self.movieController.view];
// ...
[self.movieController play];
I am trying to play an mp4 after detecting a signal in the audio jack.
The video is playing once, after a delay of 1 sec which i dont want, and then application is freezing and i get this warning on the debugger: (only on the iphone, its working on simulation)
(8F190)/Symbols/System/Library/VideoDecoders/H264H4.videodecoder (file not found).
(8F190)/Symbols/System/Library/VideoDecoders/MP4VH4.videodecoder (file not found).
my code for the video is this :
//play video1
url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"sample1" ofType:#"mp4"]];
moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
moviePlayer.useApplicationAudioSession=NO;
[moviePlayer prepareToPlay];
moviePlayer.controlStyle = MPMovieControlStyleDefault;
[moviePlayer setMovieControlMode:MPMovieControlModeHidden];
moviePlayer.view.frame = CGRectMake(0, 0, 320, 480);
[self.view addSubview:moviePlayer.view];
[moviePlayer play];
I couldnt find anything on this warning on the net.
I have tried any kind of video encoding,according to the Apple docs.
We just cant play movies, does anyone have any idea how to fix it?
thanks .
If you run that code twice, the video won't play the second time, because you are creating a second MPMoviePlayerController and a second view, and only one MPMoviePlayerController view in your app can play video. So it works the first time but not the second time. You should be retaining your MPMovieVideoController in a property so that you can remove its view and release the MPMovieVideoController before trying to make a new one.
I am facing some problem in playing multiple videos on iPAD. I am trying to play multiple thumbnail videos on the same view. You can say its much like the CCTV camera.Well, i have no clue. Please help me. Thanks in advance...
MPMoviePlayerController will allow multiple instances, but only one of them can be playing their movie at any given time.
It mentions it here: http://developer.apple.com/library/ios/#documentation/mediaplayer/reference/MPMoviePlayerController_Class/MPMoviePlayerController/MPMoviePlayerController.html
From the article:
Note: Although you may create multiple MPMoviePlayerController objects and present their views in your interface, only one movie player at a time may play its movie.
You can't use the MKMediaFramework to play multiple videos. You can however do this with the lower level AVFoundation Framework. It's not as hard as you might think and I've made a tutorial that goes over it here: http://www.sdkboy.com/?p=66
Essentially what you need to do is extend UIView so it contains an AVPlayerLayer to which the output of an AVPlayer object is directed, then you can create multiple instances of this UIView that you feed video using AVPlayer instances.
This is actually pretty simple to do on the iPad.
You basically need multiple MPMoviePlayerController objects.
Each MPMoviePlayerController object has a view property, you just need to set the frames of the views on the different MPMoviePlayerController objects to match what you want it to look like.
Here is a simple example using two MPMoviePlayerController objects ans 2 different frames:
MPMoviePlayerController *player =
[[MPMoviePlayerController alloc] initWithContentURL: myURL];
[[player view] setFrame: yourFrame1];
[myView addSubview: [player view]];
// ...
[player play];
MPMoviePlayerController *player2 =
[[MPMoviePlayerController alloc] initWithContentURL: myURL2];
[[player2 view] setFrame: yourFrame2];
[myView addSubview: [player2 view]];
// ...
[player2 play];
May be When Creating a WebView and using a HTML5 Video instance you can run multiple videos at the same time
I have any number of thumbnail images that, when tapped, will play a different video (fullscreen). I have never been clear on whether I should keep one MPMoviePlayerController object in my view controller and have it play whichever url according to the thumbnail that was tapped, or create a new MPMoviePlayerController each time. What is the best practice?
I am also having problems where tapping on different thumbs crashes the app, I believe because the MPMoviePlayerController tries to stream a video while it is already trying to stream. There seems to be no way to cancel a MPMoviePlayerController and clear out what it was doing, then start loading a new video.
Here's how I create it:
MPMoviePlayerController* moviePlayer = [[MPMoviePlayerController alloc] init];
self.player = moviePlayer;
[moviePlayer release];
Then to play a video I do this:
//would like to do something like this first - [self.player clear];
self.player.contentURL = someURL;
[self.view addSubview:player.view];
[self.player prepareToPlay];
[self.player play];
Any advice is welcome... thanks.
When you are changing the video in an MPMovieplayerController,then you can remove the mpmoviecontrollerplayer view from super view using removeFromSuperView and again add it's subview to the super view initializing it with new URL.
No need to create new object every time.
I'm having trouble getting MPMoviePlayerController to work on the device. It runs fine in simulator, playing a five-second video and then sending the appropriate callback (myMovieFinishedCallback:) to the view controller. When it runs on the device, the movie never shows up, even though I can trace through [player play] with no problems. myMovieFinishedCallback: is never called, and there are no errors. All the right resources are being copied. Any idea what's going on?
Here's the code I use to create and use the player,
Update: I've switched over to using MPMoviePlayerViewController. On the device the movie still does not play, I just get the spinning progress wheel indefinitely. The controls also flash briefly even though I've set the player to MPMovieControlStyleNone - anybody know how I can fix this? The movie is five seconds and about 1.5 MB if that makes any difference.
Update: Other movie files work, but I can't figure out how to make mine work. I've tried it as a .mov and a .mp4 and the settings seem to be right. Any idea what would cause the MPMoviePlayer to show a progress wheel forever on the device only?
- (void) playMovie
{
NSString *url = [[NSBundle mainBundle]
pathForResource:#"myMovie"
ofType:#"mp4"];
MPMoviePlayerViewController *playerViewController =
[[MPMoviePlayerViewController alloc]
initWithContentURL:[NSURL fileURLWithPath:url]];
playerViewController.moviePlayer.controlStyle = MPMovieControlStyleNone;
playerViewController.moviePlayer.scalingMode = MPMovieScalingModeFill;
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:#selector(myMovieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:[playerViewController moviePlayer]];
playerViewController.view.frame = movieView.frame;
[movieView addSubview:playerViewController.view];
//---play movie---
MPMoviePlayerController *player = [playerViewController moviePlayer];
[player play];
}
Your code works fine for me, so there are two possibilities that come to mind (there may be others):
You movieView has not been properly initialized or has not had its frame set so that it's visible.
The video format of the video you're displaying isn't supported on the device.
I would try using a different video. Maybe one you can confirm you've played on the device before. Here's the little demo project I threw together: http://www.cimgf.com/files/PlayMovie.zip