320x740 better than 720x480???

[maxwell3]

I just ran a test . Capture fr VHS using iuvcr /huffy 720x480 encode using tmpg dvd source one at 720x480 and one at 320x480 other settings the same ,burned both to dvd . I cant believe or understand this but the encode at 320x480 looks better than the encode at 720x480 . Everything seems more defined and clearer ,not alot but enough to notice . Whats up with that ???? I wonder should I capture at 320x 480 first to save space on my dvds or maybe by captureing at 720 then encoding at 320 Im clearing up the picture??

[E-Male]

you have "resolution" and "bits/(pixel*frames)"
if neither is extremely low it should be hard to tell what influences quality more

(just my thought, no guarantees)

[maxwell3]

Thanks for your input ,in both cases the only variable was the frame size . Everything else is exactly the same

[E-Male]

well, you halfed the resolution, doubling the avarage bits per pixel value

[maxwell3]

Thanks you . So this is why. Should I continue this way or am I doing something that could be accomplished with filters ?

[E-Male]

to increase the bit per pixel value you either have to decrease resolution as you do or increase the bitrate

[maxwell3]

Okay let me be sure I understand . If I capture at 720x480 and then encode at, lets says 5000kps 720x480 . Its bascially the same as capture at 720x480 then encode at 2500kps 352x480 . because by halving the resolution Im increasing the bit rrate ???

[stephanV]

it probably is not a one on one relationship, but you got the idea quite well :)

(your not increasing bitrate by decreasing resolution, but 'bit per pixel ratio')

[E-Male]

i gues at an equal bit per pixel value a higher resolution is better, because the more pixels the more to work with and get better compression

[maxwell3]

Thanks . Now that dvd-r are getting cheaper I dont mind only fitting 1 1/2 hrs on ea so I guess Ill keep doing this if it improves quality . Is there a downside to this that Im not aware of ? That also brings up an interseting question . If I capture at 320x480 instead of 720x480 . Then encode at 320x480 but use a high bit rate say 8-9k would the results be even better ?? or would the quality diminish because of the lower frame rate at capture ? Keep in mind Im capturing from vhs to iuvcr w/huffy I also noticed that in CCE there is no frame size adjustment .Hmmmmmmmmm

[E-Male]

this doesn't have anything to do with the framerate

i think it's generally recommended to capture at high resolution and to resize while encoding