转换成RealVideo。RealVideo是一种高质量，高压缩比的视频格式。也非常流行。
输入格式:
AVI, WMV, MPG, MPEG, MP4, FLV, RM, 3GP, MOV, 3G2, MTV, DV, MP4, MVI, PSP, RM, SWF, VOB
输出格式:
RealVideo
参数设置:
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