Error on DVD image when converting it to Divx

Hi experts.
With the help of poweriso I want to build up a DVD image (.img) for the sake of converting it to divx along with copy DVD mobile, but it outputs with an error message likely following:

Need a solution. Please help me.
Error:
CloneDVD Mobile
Creation of DVD files was not successful:
invalid block start code
Encoder output:
Cannot get Console handle of stdout
Try appending the scale filter to your filter list.
e.g. -vf spp.scale instead of -vf spp.
[swscaler @ 00D0EEC4]720×576 -> 320×180
a52: error at resampling
One or more blocks might be corrupted by a prior copying process or by the source device covering critical read errors.
Try copying the video files to your hard drive (again) and retry.
