Here I use ffmpeg convert Divx type into H264 ts, some like Mainconcept software function
But I found out it can't all most the same

My demond as
1.High bitrate with HD video contrant bitrate (8Mb birtate or 10Mb bitrate)using FFmpeg
2.H264 ts stream NTSC tv standard type and interlaced with Top First

command as below:
ffmpeg -y -i a_scanner_darkly.avi -vcodec libx264 -f mpegts -top 1 -r 29.97 -bufsize 2000k -b 8000k -minrate 8000k -maxrate 8000k -s 1280x720 -acode libmp3lame -ar 48000 -ab 224k a_scanner_darkly.mpg

problem 1:
Contrant bitrate is not working as document said

problem 2:
-top 1 for interlaced Top first field is not working,too

so I wonder ~ is the argument working on it?

Becuase I try Mainconcept is working well~
I need to use FFmpeg to instead of ~