Scale video without keeping aspect ratio in ffmpeg

I want to make a video ‘wide’, so the width is increased and the height stays the same as of the input image. I use the following command: ffmpeg -i test.mp4 -vf scale="1000:200" output.mp4. It just does not work. The most interesting thing that it works with png images but not with videos.
Example: video before:

After:

ffmpeg -i test.mp4 -vf scale=1000:200,setsar=1 output.mp4