What is the best way to take a DVB (.vob) video and make it playable?

[cypherinfo]

Hello,
I use to convert all the television broadcasts (I have saved with a DVB) from .vob to .mp4. I wonder how to speed up the process I am using and how to get the smallest file size possible keeping the same quality of the source file.
In the process of the conversion I have not found yet a one-stop-shop solution in terms of application.
I am using MacX HD converter pro (I have got from a giveaway on bitsdujour).
The most of my saved videos are with a size of (weird but true) Width: 352 pixel; height: 576 pixel while the aspect ratio may vary.
When I play it with vlc I have to try all the options of the aspect ratio
In order to get the best results in terms of quality of the video I try to determine what is the right aspect ratio based just on clue like: the TV logo is squared properly? and the VLC options; as you may see in the video I have attached: http://files.videohelp.com/u/214254/how%20to%20take%20a%20video%20recorded%20with%20a%...o%20player.mp4
I would like to know how to determine the right aspect ratio from the file itself.
I wonder if there is a more direct way, I mean with the use of just one application, to get the same result.
I have noticed that the file size o a .mp4 file after that process is 2 or 3 GB!!
I wonder if there is a way to get a file size no more than 1 GB keeping the same video quality?
Thank you.

[redwudz]

I would like to know how to determine the right aspect ratio from the file itself.
)Try MediaInfo. There seems to be a Mac version if that's your OS.

I have noticed that the file size o a .mp4 file after that process is 2 or 3 GB!!
)Use a lower bitrate to get a smaller file.

I wonder if there is a way to get a file size no more than 1 GB keeping the same video quality?
)No. Smaller file means lower quality.