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我已按照以下链接中的说明添加字幕(在“就像那些外国电影一样 - 为视频添加字幕”部分下):
http://www.raywenderlich.com/30200/avfoundation-tutorial-adding-overlays-and-animations-to-videos#comments
但是,由于某种原因,当我播放创建的视频时,声音被删除了。
我应该怎么做才能在最终视频中保持该音频?
任何帮助将不胜感激。