Xcode 14 打包，iOS 16 ，-[AVPlayer replaceCurrentItemWithPlayerItem:] 崩溃

[ChengzhiHuang]

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链接

一般使用场景是在画中画切换视频的时候需要用到（如果分辨率变了需要加一段黑屏的），适配了 画中画 的 APP 记得处理。

修复方案可以参考：Baseflow/XamarinMediaManager#814

给一个我们自己的修复方案

Before

AVPlayerViewController *vc = ###whatever###;
AVPlayer *player = vc.player;
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:[NSURL fileURLWithPath:path]];
if (player) {
    [player replaceCurrentItemWithPlayerItem:playerItem];
} else {
    player = [AVPlayer playerWithPlayerItem:playerItem];
}

After

AVPlayerViewController *vc = ###whatever###;
AVPlayer *player = vc.player;
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:[NSURL fileURLWithPath:path]];
if (player) {
    AVQueuePlayer *player = (AVQueuePlayer *)player;
    [player removeAllItems];
    [player insertItem:playerItem afterItem:nil];
} else {
    player = [AVQueuePlayer playerWithPlayerItem:playerItem];
}

理由

NSException Cannot remove an observer <NSKeyValueObservance 0x285c78960> for the key path "currentItem.videoComposition" from <AVPlayer 0x28524d760>, most likely because the value for the key "currentItem" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the AVPlayer class.

Thread 0 name:  com.apple.main-thread
Thread 0: Crashed:
0   CoreFoundation                          0x000000019dbea248 ___exceptionPreprocess (in CoreFoundation) + 164
1   libobjc.A.dylib                         0x0000000196fb7a64 _objc_exception_throw (in libobjc.A.dylib) + 56
2   Foundation                              0x000000019811362c -[NSKeyValueNestedProperty object:didRemoveObservance:recurse:] (in Foundation) + 512
3   Foundation                              0x00000001980959ec -[NSObject(NSKeyValueObserverRegistration) _removeObserver:forProperty:] (in Foundation) + 264
4   Foundation                              0x000000019809588c -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:] (in Foundation) + 132
5   Foundation                              0x00000001981134f4 -[NSKeyValueNestedProperty object:didRemoveObservance:recurse:] (in Foundation) + 200
6   Foundation                              0x00000001980959ec -[NSObject(NSKeyValueObserverRegistration) _removeObserver:forProperty:] (in Foundation) + 264
7   Foundation                              0x000000019809588c -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:] (in Foundation) + 132
8   Foundation                              0x000000019809579c -[NSObject(NSKeyValueObserverRegistration) removeObserver:forKeyPath:context:] (in Foundation) + 192
9   AVKit                                   0x00000001c102ee10 -[AVProxyKVOObserver stopObserving] (in AVKit) + 160
10  AVKit                                   0x00000001c0ffdcd8 -[AVObservationController _stopAllObservation] (in AVKit) + 168
11  AVKit                                   0x00000001c0ffdc0c -[AVObservationController stopAllObservation] (in AVKit) + 36
12  AVKit                                   0x00000001c102ddc0 -[AVVideoFrameVisualAnalyzer _updateObserversIfNeeded] (in AVKit) + 108
13  AVKit                                   0x00000001c102df90 -[AVVideoFrameVisualAnalyzer _updateActualEnabledStateIfNeeded] (in AVKit) + 96
14  AVKit                                   0x00000001c0ffd5b8 ___105-[AVObservationController startObserving:keyPaths:includeInitialValue:includeChanges:observationHandler:]_block_invoke (in AVKit) + 216
15  AVKit                                   0x00000001c0ff2e78 -[AVProxyKVOObserver _handleValueChangeForKeyPath:ofObject:oldValue:newValue:context:] (in AVKit) + 140
16  AVKit                                   0x00000001c0ff2d90 -[AVProxyKVOObserver observeValueForKeyPath:ofObject:change:context:] (in AVKit) + 192
17  Foundation                              0x000000019806b920 _NSKeyValueNotifyObserver (in Foundation) + 248
18  Foundation                              0x0000000198081db0 _NSKeyValueDidChange (in Foundation) + 352
19  Foundation                              0x000000019806ed6c -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] (in Foundation) + 644
20  Foundation                              0x000000019806eabc -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] (in Foundation) + 60
21  Foundation                              0x000000019806e050 __NSSetObjectValueAndNotify (in Foundation) + 280
22  AVKit                                   0x00000001c0feb570 -[AVPlayerController _prepareAssetForInspectionIfNeeded] (in AVKit) + 132
23  AVKit                                   0x00000001c10af5b8 ___30-[AVPlayerController startKVO]_block_invoke_6 (in AVKit) + 28
24  AVKit                                   0x00000001c0ffd5b8 ___105-[AVObservationController startObserving:keyPaths:includeInitialValue:includeChanges:observationHandler:]_block_invoke (in AVKit) + 216
25  AVKit                                   0x00000001c0ff2e78 -[AVProxyKVOObserver _handleValueChangeForKeyPath:ofObject:oldValue:newValue:context:] (in AVKit) + 140
26  AVKit                                   0x00000001c0ff2d90 -[AVProxyKVOObserver observeValueForKeyPath:ofObject:change:context:] (in AVKit) + 192
27  Foundation                              0x000000019806cc88 -[NSKeyValueObservance observeValueForKeyPath:ofObject:change:context:] (in Foundation) + 300
28  Foundation                              0x000000019806b920 _NSKeyValueNotifyObserver (in Foundation) + 248
29  Foundation                              0x0000000198081db0 _NSKeyValueDidChange (in Foundation) + 352
30  Foundation                              0x00000001980d8390 _NSKeyValueDidChangeWithPerThreadPendingNotifications (in Foundation) + 152
31  AVFCore                                 0x00000001ad17c964 ___109-[AVPlayer _runOnIvarAccessQueueOperationThatMayChangeCurrentItemWithPreflightBlock:modificationBlock:error:]_block_invoke_2 (in AVFCore) + 760
32  AVFCore                                 0x00000001ad147dd8 -[AVSerializedMostlySynchronousReentrantBlockScheduler scheduleBlock:] (in AVFCore) + 308
33  AVFCore                                 0x00000001ad1475f4 -[AVPlayer _runOnIvarAccessQueueOperationThatMayChangeCurrentItemWithPreflightBlock:modificationBlock:error:] (in AVFCore) + 372
34  AVFCore                                 0x00000001ad1473d0 -[AVPlayer replaceCurrentItemWithPlayerItem:] (in AVFCore) + 444