Handbrake can convert a DVD clip which is about 30 minutes to a 300MB
.mkv file. For experiment, I tried also 1GB file size and 2GB, and they both came out as 1GB or 2GB.
But I estimate that the original video on the DVD should be only about 600MB, so how can it make the file "bigger than it was before"? (the mkv, mp4 format should allow better compression that the DVD's mpeg2).
I also remember I tried experimenting with divx or xvid before, and there was a limit to file size: for example, I can specify a 1.5 hour video to have 3GB or to have 8Mbit/s, but the content simply didn't have so much "bits" for it to store (because it can highly compress the video), so the final file could not exceed 1.8GB or something like that, no matter how high the bit rate or desired file size I gave it. But with Handbrake, it seems like I can create a 1GB or 2GB file with such a short clip. Why is that?