Resolution 352x576

[mike100]

I want to change the outcoming video resolution to 352x576 instead of 480x576. I read that this resolution has nearly no less quality and is a kind of DVD-standard (1/2 D1). The source is anamorphic widescreen 2,35:1.

Where do I have to do it in the AVISynth script file? At Bicubicle Resize changing from (480,432,0.00,0.60) to what?

I tried it with (352,432,0.00,0.60), TMPEGEnc starts but the screen is green and remains green. The status line is as follows: "DVD2SVCD (MPEG-2 352x576 25fps (for PAL) CQ...)"

Did I something wrong?

[orbit-r]

hi mike100
in my opinion there is no need for the d1 resolution when making (x)svcd`s from dvd-source.cause normally the dvd source is very good quality...and there for no need for giving the blocks a little more bitrate(D1 resolution). with the right settings(marks sharpen way f.e:) i believe you will not see a difference in the quality of the movie (between 352*576 vs.480*576)
however maybe try this script(fitcd) when you willkeep on:
#(for tmpeg)#

BicubicResize(304,384,0,0.6,18,0,684,576)
AddBorders(24,96,24,96)

this is from fitcd ( it calculates optimized avs scripts)

hope this helps
orbit-r

:cool:

[adam]

Well as far as the perceptible differences between 352x480 and 480x480, thats purely subjective however it should be noted that at 352x480 at 2.6mbits you can literally achieve the same amount of bits per pixel that a typical dvd uses, while the same cannot be said for svcd at 480x480.

I always use 352x480 anytime I cannot achieve an avg bitrate of 2mbits or higher, and in these cases I can definitely notice a significant difference in quality.

[avdmb]

@DVD2SVCD, would it be a big deal to offer this resolution (352 * 480/576) aside to SVCD, VCD and DVD sizes in a future DVD2sVCD build ?

[avdmb]

Saw in your latest Readme together with beta version that this option is now implemented. That was fast ! Thanks.

[Twin]

Where can one get it? The beta I mean..

[orbit-r]

read the first sticky here!

[sandchar99]

This is an interesting thread.

I have always done SVCD standard 480x480 although sometimes my bitrate goes down to 1900 or so when trying to get 50+ minutes on to a disc. (A lot of times I regain some bits per pixel quality and improve CCE RT by croping out the black borders on a 2.35:1 encode and adding larger borders in the AVS script.)

1) If you change the horizontal resolution down to 352 for SVCD, would this be more noticeable on a high resolution TV?

2) If more and more people are going to use this feature, might it be nice (;) ) if on the Bitrate tab, there would be an additional column that would calculate the "bits per pixel", taking into account resize resolution and Aspect ratio (4:3 or 16:9 (resized to fit 4:3)) so that users could have a healthy comparison when deciding what to resize to?

[avdmb]

1) Do you see a difference when you scan/print at 360 dpi versus 180 dpi ? You will notice similar effect, i.e. less contrast. Best is to try and compare !

2) Use your pocket calculator :http://forum.doom9.org/showthread.php?s=&postid=141473#post141473