Why is DVD image size less than used space on media?

cmclernon wrote on 9/18/2011, 9:09 AM

I have just purchased Rescue Your Videotapes V 4.0

I capture video using the highest quality settings. After editing, I burn my
discs also using the highest quality settings. The image size, however, is
much less than the projected used space on media. In one project, for
example, the projected used space on the media was 4.275 Gb, but the image
size was only 1.49 Gb.

Why is this, and is there anything I can do about it?

I fear I may be losing video quality as a result, as it seems that the image is over compressed..

I use a Packard Bell PC with Windows 7, an Intel Core 13 processor and 6 Gb
RAM

Comments

johnebaker wrote on 9/18/2011, 11:35 AM

The predicted space usage is only that. During the encoding if the video can be compressed more ie there is for example sequences with very little movement or change, these will be compressed more than scenes where there is a lot of movement.

I don't think you would have to lower the settings quite a bit before you start to lose any quality compared to the starting material - in your case video tape which is of lower definition standard than a DVD.

John

david wrote on 9/20/2011, 1:34 PM

RAM,

To do a better compare, compare the file size of your raw data (rather than projected size) to what was output on the DVD since both were at the highest settings.

David