How do I write an ffmpeg script that will simply strip the audio track?

[Iced Coffee]

Hello again. I was hoping I could get some help with ffmpeg's commands. What I'd like to do is create an ffmpeg script/batch file (I'm on Windows) that strips the audio from a video. The video track would be untouched.

I tried this with a simple

-i sandwich.mkv -an -vcodec copy sandwich2.mkv

Which to me, says "take sandwich.mkv, ignore the audio, duplicate the video, save it as sandwich2.mkv", perfect.

But I was given a file with a muxing overhead of 26%, making it considerably larger than the file I started with. I'm not really sure of what I'm doing wrong, so I was hoping someone could advise me. What's the best way to simply pluck the audio track from a video and throw it away?

[poisondeathray]

what does the log file say?

try changing the order (video before audio)