CODEWITHSUNDEEP
objective-cipadvideoios4ios
ChrisB
ChrisB

Reputation: 2048

iPad Video with Transparency

is it possible to have a QuickTime video with alpha layer (transparency) play on top of a static dynamic background UIView (i.e. a view that changes occasionally) on the iPad?

Thanks!

Upvotes: 21

Views: 6176

Answers (5)

MoDJ
MoDJ

Reputation: 4425

Just to clear up the misinformation, you can't use a video with an alpha channel using the built in video logic in iOS. You can create a Quicktime movie encoded with the Animation codec and load the video into a view or layer using AVAnimator. What you can't do is create a H264 video with an alpha channel, that is simply is not supported by iOS.

display movies with an alpha channel under iOS

Upvotes: 3

Steven Veltema
Steven Veltema

Reputation: 2150

You could have a normal video and reduce the alpha of the presenting view. This can be done using an AVPlayer and AVPlayerLayer by adding the AVPlayerLayer to a UIView and setting the alpha of the UIView. Something like:

self.player = [[AVPlayer alloc] initWithURL:url];
self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:self.player];
self.playerLayer.frame = view.bounds;
...etc...
self.playerView.alpha = 0.3;
[self.playerView.layer addSublayer:self.playerLayer];

I haven't tried this with the alpha channel in the video itself, but AVPlayerLayer should work for that as well.

Upvotes: 0

kcharwood
kcharwood

Reputation: 2531

MPMoviePlayerController has a backgroundView property. The docs state:

This view provides the backing content, on top of which the movie content is displayed. You can add subviews to the background view if you want to display custom background content.

I haven't tried it, but if the video content itself has alpha, it sounds like this view should show up. If you set that view to clear, it may just work...

Upvotes: 1

Vipin Vijay
Vipin Vijay

Reputation: 393

I think you can make videos transparent , while playing the video adjust the alpha of view from 0.0 to 1.0. for eg 0.50. After playing the vido change the alpha of view to 1.0.

Upvotes: -1

endo.anaconda
endo.anaconda

Reputation: 2468

first your video needs transparency: http://docs.info.apple.com/article.html?artnum=42599

IMHO: I think the videocomponent has a solid background color (black) you will have to set it to [UIColor clearColor] You have to try, im not sure if that works.

cheers endo

Upvotes: 0

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