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

[raveningrocks at hotmail.com]

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

Without checking the docs I don't remember the flag to specify output size but this error means that you forgot - before scale and ffmpeg interpreta it as the output file, which has no extension and as u didn't specify one ffmpeg stops.

Check the docs again, I am sure you will find the answer u are searching for.

Best,
Federico.