Bitrates: CQ Above Watermark ?
 

I've made my first KVCD WITH the optimal script...

I've got a CQ of 66.84, SVCD 480x480.

I want to know if the quality will be better if my movie, instead of 480x480, go in VCD format, but with higher CQ?

I want to check the prediction of my VCD with CQMatic, the same way I've made my SVCD, and i've only change the resolution, and I get this error after the second pass:

CQ ABOVE watermark. CQ set to 90.
Using CQ of 90
CQMatic complete!

What is that???

That's not an error message :!: It is telling you that it did the prediction and the cq was above 90 so a cq of 90 is recommended.

352x240 @ cq 90 or
480x480 @ cq 66.84

But normal too that i've setup my MAX bitrate at 2500? A CQ of 90, for a 1h30 movie, at 352x240, i'm septic.....

Can you post your complete CQMatic-log :?:
Please make sure that you have cleared source range in your project file.

How can I copy-paste the log???

Double-click on the log window 8)

Yes my source range is set to "default" and UNCHECK the box after.

This is my log:

Can't see any error on first sight. You could try again with a higher resolution and see what CQ comes out.

At 352x240, if the encoder doesn't require too much high bitrate, that's the reason it sets the CQ to 90. Specially if it's only a 90 minute movie.

-kwag

Right now, i'm encoding at 352x240 with CQ85, 45min left

But what will be better?

480x480 @ CQ66
or
352x240 @ CQ85

???

In other word, higher resolution with lower bitrate, or lower resolution with higher bitrate?

Thats hard to tell. I think its source related. You could create 2 samples with the two resolutions and compare them by yourself.
I would take the bigger one :wink:

only my opinion Rambytes...
i always got better results with more resolutions.
my personal choice is 480x480 @ CQ66!
but nothing is better than little samples encoded
with each resolution to compare....like the hints from Krassi!
:wink:

It'S only because, in my mind, 66% between 85%, the image is better quality with 85?

No?

maybe,...

is hard to choose without see the result.
resolution and CQ parameters are importants.

encode from the same source one little sample
with 480x480@CQ66 and another 352x240@CQ85.
your eyes will choose the best result.

:!:

No. Specially that at 352x240 you only have half the lines :!:
240 vs. 480.
Unless it's a long movie, or very high action, and the bitrate/pixel ratio is below good visible quality at 480x480, then 352x240 will look better (less blocky that is) but not sharper than 480x480.

-kwag

ha,
now Kwag came with clear explanations,
than don't have any doubts Rambytes.

follow the developer!
:wink: