Question about saving AVI file with VirtualDubMod

[prodit]

Hello
This is the first time I use VirtualDubMod, the version is 1.5.10.
I have an AVI file, its size is almost 700 MB. I have an SRT file, it is the subtitle for the first file.
I want to merge them together so I will get one AVI file.
That's exactly what I did after reading this guide How to add permanent subtitle to a video with virtualdubmod
The problem is that I got an AVI file which its size is 778 MB. So unfortunately I can't burn it on one CD.
The question is
How can I save the file in the AVI format with less space (between 650 and 700 MB) using VirtualDubMod?

Thanks

[Baldrick]

You must set the video bitrate to get correct file size, see https://forum.videohelp.com/viewtopic.php?t=316373&highlight=

You could also use avirecomp instead of virtualdub to add the subtitle. Easier to use and very easy to set the output file size.

[prodit]

Thank you, that was exactly what I was looking for
But the result's quality is worse than the original video. Can I fix that ?

[Baldrick]

No, you will lose some video quality if you add permanent subtitles. You can use higher bitrate but it means bigger file size then.