Simple case, assuming the input is a direct link. nice ffmpeg -hide_banner -i 'https://files.catbox.moe/1pcnwn.webm' -threads 1 file:bitch-slapped.mp4 Or if you have a beefy rig (I don't): ffmpeg -hide_banner -i 'https://files.catbox.moe/1pcnwn.webm' file:bitch-slapped.mp4