在視頻合成的時候 設置了AVVideoCompositionCoreAnimationTool 但是在合成視頻 無AnimationLayer 的顯示

你可以能需要更改

open var instructions: [AVVideoCompositionInstructionProtocol] public protocol AVVideoCompositionInstructionProtocol : NSObjectProtocol {/* If NO, indicates that post-processing should be skipped for the duration of this instruction.See +[AVVideoCompositionCoreAnimationTool videoCompositionToolWithPostProcessingAsVideoLayer:inLayer:].*/var enablePostProcessing: Bool { get }/* If YES, rendering a frame from the same source buffers and the same composition instruction at 2 differentcompositionTime may yield different output frames. If NO, 2 such compositions would yield thesame frame. The media pipeline may me able to avoid some duplicate processing when containsTweening is NO */var containsTweening: Bool { get }

需要自定義的 實現 AVVideoCompositionInstructionProtocol 協議的 實例對象設置

enablePostProcessing = true

官方文檔這句話 需要注意一下
If NO, indicates that post-processing should be skipped for the duration of this instruction.
See +[AVVideoCompositionCoreAnimationTool videoCompositionToolWithPostProcessingAsVideoLayer:inLayer:].

總結

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