[FFmpeg-user] Capturing a frame from video and resizing it...issue.

[Dani A]

FFMPEG users,
What is the right commmand to capture a frame a from a Video file on specific time and resize the frame image size in the same command?

I am using the below and it is not working:
ffmpeg -i apple.mp4 -ss 00:00:4 -vframes 1 scale=241:164 apple2.png

Error:
[NULL @ 0xc217720] Unable to find a suitable output format for 'scale=320:240'
scale=320:240: Invalid argument