Picture format conversion--from BMP to yuv420p__ pictures

Preface step target raw Material conversion command

Preface

I remember writing before, but I can't find it and write it again.
Use FFmpeg to convert picture formats. Steps Target

Converts a picture from BMP (inside format is rgb24) to the yuv420p format. Raw Material Ffmepg.exe
FFMEPG's library provides a BMP picture
From the Web, or by using the drawing tools that Windows has taken from you. Conversion Command

Convert BMP Picture 1440_900_2.bmp (internal format to rgb24) to 1440_900_2.YUV

Ffmpeg-s 1440x900-pix_fmt rgb24-i 1440_900_2.bmp-s 1440x900-pix_fmt yuv420p