Doubt with conversion of DVD to XviD???

[go4saket]

Hello guys!

I just converted a movie from DVD format to XVID with Auto Gordian Knot using its basic settings. The resolution of the original video was 720*480 which the converted video has a resolution of 592*256. Again, the original video was of 29.97 FPS which the converted one is of 23.97 FPS. Why this difference? How come the resolution and framerate went down when I didnt do any such setting? Will a lower framerate and resolution effect the video viewing in a normal television?

Chao.

[CWR03]

Movies are supposed to be 24 FPS (or 23.97 FPS) - if it left it at 29.97 and removed the interlacing, camera pans wouldn't be smooth. The resolution was reduced to help keep the quality respectable while meeting your selected output size. That's why it's called AutoGK - it does everything for you automatically to remove as much guesswork as possible.

[Blue_MiSfit]

Well... not all movies are 24 fps.

The reason the frame rate changed is because chances are your DVD is really 24 progressive fps (23.976 to be exact), but 3:2 pulldown embeds this progressive image into a 60i image for playback on standard NTSC TVs which are natively 60i.

DGMPGdec, which handles the mpeg-2 decoding, is smart enough to realize that the video is really 24p, and removes this pulldown, recovering the original 24p. This is a 100% ideal situation.

As CWR03 said, the reason your resolution was reduced was probably to improve quality. From the looks of things you probably chose a 1cd filesize - 700MB. Without careful manual tweaking and filtering, maintaining full NTSC resolution on a 700MB backup produces pretty bad results with all but the most compressible sources. AutoGK knows this, and reduces resolution to make the file look bigger. It's a tradeoff between resolution and preserved detail (sort of).

In short, everything is working as it should :)

If you want to preserve the full frame size, learn how to do things manually, or use a larger output file size in AutoGK.

Good luck! Welcome to DVD Backup, it's a lot of fun :D

~MiSfit