Question

I am working on playing a online video file with AVplayer using AVMutablecomposition. The Video plays very fine when I play it on browser but I just cant get it play on my iPad.

该法典:

self.composition = [AVMutableComposition composition];

NSURL *urlVideo = [NSURL URLWithString:@"{video location}"];
AVURLAsset *videoAsset = [[AVURLAsset alloc]initWithURL:urlVideo options:nil];

AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];

NSError *error = NULL;

AVAssetTrack *videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]objectAtIndex:0];
CMTimeRange x = CMTimeRangeMake(kCMTimeZero, [videoAsset duration]);
[compositionVideoTrack insertTimeRange:x ofTrack:videoTrack atTime:kCMTimeZero error:nil];

以及确定AVPlayer的法典:

AVPlayerItem *playerItem = [[AVPlayerItem alloc]initWithAsset:composition];

 self.player = [[AVPlayer alloc]initWithPlayerItem:playerItem];
AVPlayerLayer *layerVideo = [AVPlayerLayer playerLayerWithPlayer:self.player];
layerVideo.frame = self.view.layer.bounds;
layerVideo.backgroundColor = [UIColor orangeColor].CGColor;
layerVideo.position = CGPointMake(1024/2, 768/2-10);

[self.view.layer addSublayer:layerVideo];
[self.player play];

If I use "AVPlayerItem *playerItem = [AVPlayerItem playerItemWithAsset:videoAsset];" instead of "AVPlayerItem *playerItem = [[AVPlayerItem alloc]initWithAsset:composition];" then I can see the video playing.

任何人都知道如何使用AVplayer与ARVutablecomposition的录像?

Answer 1

你的法典缺乏对两条错误的核对,但它也发挥了作用。

除非你重新插入一篮子,否则会把参与者送走:

layerVideo.position = CGPointMake(1024/2, 768/2-10);

如果是这样的话,就以正确的立场进行审判。

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