该设计的特点是在底层屏蔽不同类型文件解码时对媒体流处理的差异，并且提供了对外部摄像头设备的控制功能。
The differents between two types of file could be shielded and the function which could contol external camera is also supported in this design.
该设计的特点是在底层屏蔽不同类型文件解码时对媒体流处理的差异，并且提供了对外部摄像头设备的控制功能。
The differents between two types of file could be shielded and the function which could contol external camera is also supported in this design.
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