Hi! Lately I've been downloading a mkv. video file on my PC. I put the file in my USB drive and left it. When I connect my USB drive to a tablet, it couldn't play the video. Then, after searching for the specifications, I found out that portable devices could not play mkv. videos because they support mostly mp4. When I converted the file using VLC Media Player (It can do that) into mp4. It worked! But the problem is that it doesn't have subtitles in it. When I searched around for the SRT file (Subtitle file) of my mkv. videos, I can't find any because the subtitle is already in the mkv video. If there is any way I to convert along with the subtitle, PLEASE REPLY!

Hey there, Chai Matthew! This solution should work.

MediaCoder, a program known for converting .mkv files with subtitles to .mp4's should do the trick! Here's a video tutorial that shows you how to do that.
https://www.youtube.com/watch?v=fbCDTN--XGA

Hope it helps you achieve what you want!

Damn! File too big! Is there any other software?