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./ffmpeg -i yuv264.mp4 -vf “split [main] [tmp];[tmp] crop=iw:ih/2:0:0,vflip [flip];[main][flip] overlay=0:H/2” yuvfilter.mp4滤镜**sudo ffmpeg -i yuv264.flv -c copy -f flv rtmp://192.168.1.168/live/classffmpeg -listen 1 -f flv -i tcp://127.0.0.1:1234/liv