ffmpeg partial transcode using -ss and -to

I am trying to achieve partial transcode using ffmpeg. The command I am using currently is:

ffmpeg.exe -ss start-time -i source file -t duration -y -s 640x360 -b:v 1024k -vcodec libx264 -r 29.7 -movflags faststart -pix_fmt yuv420p outputfile

In the ffmpeg documentation, I read about -to parameter:

-to position (output) Stop writing the output at position. position may be a number in seconds, or in hh:mm:ss[.xxx] form.

-to and -t are mutually exclusive and -t has priority.

But when I tried -to in place of "-t" , the output was same, I mean the value after -to is taken as duration of out put video. I thought it would treat the value like end time. Am I missing something?

From the FFmpeg Wiki:

Note that if you specify -ss before -i only, the timestamps will be reset to zero, so -t and -to have the same effect:

ffmpeg -ss 00:01:00 -i video.mp4 -to 00:02:00 -c copy cut.mp4
ffmpeg -i video.mp4 -ss 00:01:00 -to 00:02:00 -c copy cut.mp4

Here, the first command will cut from 00:01:00 to 00:03:00 (in the original), whereas the second command would cut from 00:01:00 to 00:02:00, as intended.

So, make sure you put -ss after the input, so that the timestamps aren't reset.