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请问使用jpeg压缩库输入格式为YUV422I，输出选择YUV420P，我如何验证输出的格式是什么，不都是JPEG吗。输出格式选择后是将输入按照输出格式重新排布后再进行压缩吗？
jpeg是压缩算法,YUV是color format
