ffmpeg.exe encoding mjpg at the highest quality possibile

Hi

to encode my example-source file https://dl.dropboxusercontent.com/u/39871584/C0020.mxf I use:

ffmpeg -i d:\c0020.mxf -vcodec mjpeg -pix_fmt yuvj422p -q:v 0 -an output.avi

If I wont transcode at the highest quality possibly is correct I use -pix_fmt yuvj422p?

and to increase bitrate is correct I use -q:v 0?

thanks