[FFmpeg-user] How to record via udp without c:v copy?

[comp4me]

I wasn't so clear
when i wrote record i mean save stream on file' like : 
ffmpeg -i rtsp://x.x.x.x/video vvv.h264
why do you think i need faster encoder?
i get error on decoder , "[h264 @ 03692ba0] error while decoding"
I don't want to use c:v copy becuase then i can't overlayer
how can i use faster encoder/decoder (-tune not help me ) to save rtsp
stream to file



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