[FFmpeg-user] Need some help for saving bmp

[铁 慕容]

Hi Guys
 
DO you know how to save a decoded file to bmp format? I used the following command to decode a VC3 file and save the result, but failed. The interesting thing is when I decode a dv file, it works.
 
./ffmpeg -i Frame1.VC3 -vcodec dnxhd -r 25 -b 200k -sameq -y -f image2 output%03.bmp
 
The error message was given: 
 
[dnxhd @ 0x1447f20]video parameters incompatible with DNxHD
Output #0, image2, to 'output%03.bmp':
    Stream #0.0: Video: dnxhd, yuv422p, 1920x1080, q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
av_transcode() OUT

What's the problem? Thanks a lot.
 

Kind Wishes
 
Yours
Chao.Guo