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When I opened the video in HTML, it crashed when I started playing it。 Here is my app crash report: 0 CoreFoundation __HALT + 2 arrow_right 1 QuartzCore CA::Layer::setter(unsigned int, _CAValueType, void const*) + 252 2 QuartzCore[CALayer setBackgroundColor:] + 56 3 QuartzCore[CAStateSetValue apply:] + 620 4 QuartzCore[CAStateController setState:ofLayer:transitionSpeed:] + 1364 5 AVKit[AVMicaPackage transitionToStateWithName:onLayer:] + 144 6 AVKit[AVMicaPackage transitionToStateWithName:] + 92 7 AVKit[AVMicaPackage _setState:] + 108 8 AVKit[AVMicaPackage setState:color:] + 116 9 AVKit[AVPlaybackControlsRoutePickerView updateButtonAppearance] + 204 10 AVKit[AVRoutePickerView layoutSubviews] + 632 11 UIKitCore[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2500 12 QuartzCore[CALayer layoutSublayers] + 296 13 QuartzCore CA::Layer::layout_if_needed(CA::Transaction*) + 524 14 QuartzCore CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 144 15 QuartzCore CA::Context::commit_transaction(CA::Transaction*, double, double*) + 416 16 QuartzCore CA::Transaction::commit() + 732 17 QuartzCore CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 96 18 CoreFoundation CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION + 36 19 CoreFoundation __CFRunLoopDoObservers + 576 20 CoreFoundation __CFRunLoopRun + 1056 21 CoreFoundation CFRunLoopRunSpecific + 600 22 GraphicsServices GSEventRunModal + 164 23 UIKitCore[UIApplication _run] + 1072 24 UIKitCore UIApplicationMain + 168 25 AXNews main.m - 第 15 行 main + 15 26 libdyld.dylib start + 4