[FFmpeg-user] Extract xvid stream in mov container

[jacques perconte]

 Dear Community

I have a xvid video stream in a quicktime mov container and i do not
manage to extract it without touching the encoding. It is very
important for me to protect the image structure of the stream.

i tried

ffmpeg -i input.mov -c:v copy -an output.avi
ffmpeg -loglevel debug -analyzeduration 6M  -i nput.mov -c copy -s
1920x1080 output.avi

it always print
"[avi @ 0x7fe9e303ce00] Dimensions not set
Could not write header for output file #0 (incorrect codec parameters
?): Invalid argument"

any idea ?

Thank you
jacques