Audio and Image caption not below respective files

In non-AMP pages audio is full width and audio caption is below audio. But in AMP pages audio is not centered and audio caption is also not below audio. In non-AMP pages image is centered and image caption is below image. But in AMP pages image is not centered only image caption is centered. Please give me a solution either to make audio full width or to make audio caption below audio and also give me a solution for image.

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