[FFmpeg-user] retry from end of last failed download attempt??

[Hans J. Albertsson]

Is there any way to make

ffmpeg -i <web address of media file> (various options) outfile.ext

restart from last attempt automatically., after a previous attempt 
failed for some reason leaving a partially downloaded file??

At least for some types of sources and/or output file types/formats???

Like rtmpdump could/can.