I have a 200MB AVI that I'm trying to add hardsubs to. I'm using VirtualDub to do it. I selected the H264 lossless codec for compression. The resulting file is 800MB. Why does this happen? Is there a better way to do this?
The reason is that lossless doesn't loss any quality but makes the file bigger and lossy which is the oppostite reduces video and sound quality but at a smaller file.
I would choose a different codec or choose the H.264 Lossy Codec for it.
EDIT: I would choose H.264 Lossless Codec and convert it using Handbrake MP4 ffmpeg format.