我想出来了,贴在下面:
ffmpeg -re -i XXX-05763.mxf -pix_fmt yuv420p -map 0:v:0 -map 0:a:0 -c:a aac -c:v libx264 -use_template 1 -use_timeline 1 -frag_type duration -init_seg_name "init-stream$RepresentationID$-$Bandwidth$.mp4" -b:v 12000k -profile:v main -level:v 3.0 -s 1920x1080 -r 25 -adaptation_sets "id=0,streams=v id=1,streams=a" -dash_segment_type mp4 -f dash XXX-05763.mpd