ffmpeg supports a large number of YUV pixel formats (run ffmpeg -pix_fmts to see all). You can convert any input file to a YUV file with:
ffmpeg -i input.jpg -f rawvideo -pix_fmt yuv420p output.yuv The same applies to video too.
The full list of YUV pixel formats:
Name Components Bits/Pixel ============================================== yuv420p 3 12 yuv422p 3 16 yuv444p 3 24 yuv410p 3 9 yuv411p 3 12 yuvj420p 3 12 yuvj422p 3 16 yuvj444p 3 24 yuv440p 3 16 yuvj440p 3 16 yuva420p 4 20 yuv420p16le 3 24 yuv420p16be 3 24 yuv422p16le 3 32 yuv422p16be 3 32 yuv444p16le 3 48 yuv444p16be 3 48 yuv420p9be 3 13 yuv420p9le 3 13 yuv420p10be 3 15 yuv420p10le 3 15 yuv422p10be 3 20 yuv422p10le 3 20 yuv444p9be 3 27 yuv444p9le 3 27 yuv444p10be 3 30 yuv444p10le 3 30 yuv422p9be 3 18 yuv422p9le 3 18 yuva420p9be 4 22 yuva420p9le 4 22 yuva422p9be 4 27 yuva422p9le 4 27 yuva444p9be 4 36 yuva444p9le 4 36 yuva420p10be 4 25 yuva420p10le 4 25 yuva422p10be 4 30 yuva422p10le 4 30 yuva444p10be 4 40 yuva444p10le 4 40 yuva420p16be 4 40 yuva420p16le 4 40 yuva422p16be 4 48 yuva422p16le 4 48 yuva444p16be 4 64 yuva444p16le 4 64 yuva444p 4 32 yuva422p 4 24 yuv420p12be 3 18 yuv420p12le 3 18 yuv420p14be 3 21 yuv420p14le 3 21 yuv422p12be 3 24 yuv422p12le 3 24 yuv422p14be 3 28 yuv422p14le 3 28 yuv444p12be 3 36 yuv444p12le 3 36 yuv444p14be 3 42 yuv444p14le 3 42 yuvj411p 3 12