Q settings for bakers new cvd guide.

[baker]

PLease post your settings like this:

Name of film:
Length of film:
aspect ratio:
Q used:
cds used:

If you do not know what this is about you must read my dvd compliant cvd guide and it will explain it.

An example will follow this post.

Baker

[baker]

Name of film: Bandits
Length of film: 117 mins approx
aspect ratio: 16:9 ultra wide
Q used: 7
cds used: 3

Baker

[baker]

Name of film: The Matrix
Length of film: 131 mins approx
aspect ratio: 16:9
Q used: 7
cds used: 3

Baker

[Cams]

Film: Moulin Rouge
length:127 min
Aspect; 16:9
q used :7
no disc: 4 (disc 4 only 174k nothin on it ?)

[baker]

Film: The matrix
length:131 min
Aspect; 16:9 anamorphic
q used :7
no disc: 3

[vitualis]

Name of film: Bandits
Length of film: 117 mins approx
aspect ratio: 16:9 ultra wide
Q used: 7
cds used: 3

Baker

Just curiousity... what is the max. bitrate setting you are using?

If you are still using the SVCD (or CVD) specification max (i.e., < 2x CD), you might as well have just used CBR at max. for this movie (3 disc x 40 min/disc = 120 min).

Regards.

[baker]

Well you see virtualas, I am try to develope a method that will work for every film without any settings needing to be changed Bandits took up very little of that last disk. As this post is showing so far there are very few films which will need for these settings to be changed at all. PLus with a Q of 7 the difference between 1 pass vbr and cbr would be very very little or none. As singal pass is very sensitive and where it needed to it would instantly up the bitrate.

Baker

[lexxone]

HELP!!!!

All is ok by Ripping and converting, but when i have a 3 cd Rip then the last cd-image is damaged! I can burn it, but no player can play the 3 cd. I hope you can help me fast.

CU

LexxOne

[vitualis]

Well you see virtualas, I am try to develope a method that will work for every film without any settings needing to be changed Bandits took up very little of that last disk. As this post is showing so far there are very few films which will need for these settings to be changed at all. PLus with a Q of 7 the difference between 1 pass vbr and cbr would be very very little or none. As singal pass is very sensitive and where it needed to it would instantly up the bitrate.

Baker

That's fair, but I'm trying to remind of of a principle...

Remember that as long as you are remaining within SVCD bitrate specs, there is a natural maximum. At 2500 kbit/s CBR, you can fit 2 hours of video on 3 discs. 2500 kbit/s CBR is the maximum quality video available to SVCD. No VBR technique (within SVCD specs) can look better than this.

Thus, if your movie is less than 2 hours long, it is illogical to use three discs AND VBR encoding. CBR 2500 will fit and WILL offer better quality.

Default "one-size-fits-all" settings probably won't work for SVCDs.

Regards.

[baker]

Must agree virtualas everything you stated there is true. But I also think you must agree that there is no other way to keep such great quailty and speed without having to change any settings and fitting almost any film on 3cds then my guide.

Default "one-size-fits-all" settings probably won't work for SVCDs.

Hmmmm. If you mean that some films might not fit on 3cds then thats what I created this post for. If any films stetch over the 3 cd limit (3's nearly too many nevermind 4!!) then the Q number must be changed. If anybody has found a film (pearl harbour perhaps) that when ripped caused more then 3 cds and they found a Q that allowed for 3 cds then I would like hem to post it here. (by the way the matrix fits on 3cds with lots of room to spare, dark movie I know but still good.)

Thus, if your movie is less than 2 hours long, it is illogical to use three discs AND VBR encoding. CBR 2500 will fit and WILL offer better quality.

Must also agree there mister vulkcan .

However if you have the time why not create a test using cbr and vbr with my guide on say the matrix and tell me if you can tell a big difference.

Thanks for your analyisis,
Baker

[vitualis]

But I also think you must agree that there is no other way to keep such great quailty and speed without having to change any settings and fitting almost any film on 3cds then my guide.

Fair enough... However, I'm of the belief that people should be encouraged to learn to change settings for each SVCD encoding, so to maximise quality and so that each encoding is appropriate for the video material and task at hand.

It is not very difficult to do and all that is required is a little bit of planning and thought.

Default "one-size-fits-all" settings probably won't work for SVCDs.

Hmmmm. If you mean that some films might not fit on 3cds then thats what I created this post for. If any films stetch over the 3 cd limit (3's nearly too many nevermind 4!!) then the Q number must be changed. If anybody has found a film (pearl harbour perhaps) that when ripped caused more then 3 cds and they found a Q that allowed for 3 cds then I would like hem to post it here. (by the way the matrix fits on 3cds with lots of room to spare, dark movie I know but still good.)

No, what I mean is that there is probably not one setting that will be appropriate for all or even most movies.

For instance, for your Matrix encoding, if you where going to put it on three discs and you had lots of space left on the third, it means that (1) you should have used a much higher average bitrate (for multipass VBR) or (2) you should have only used 2 discs.

Must also agree there mister vulkcan .

Live long and prosper!

However if you have the time why not create a test using cbr and vbr with my guide on say the matrix and tell me if you can tell a big difference.

The difference may or may not be great, but it is a matter of efficiency. For example, less than 10 seconds of planning would be needed to stop you from using CQ over 3 discs for "Bandits", when CBR would have done the same at better quality. Or perhaps it would have been more appropriate to put it on two discs...

Regards.

[baker]

@virtualas

Remember that as long as you are remaining within SVCD bitrate specs, there is a natural maximum. At 2500 kbit/s CBR, you can fit 2 hours of video on 3 discs. 2500 kbit/s CBR is the maximum quality video available to SVCD. No VBR technique (within SVCD specs) can look better than this.

Well you have been recognised! Me and stanwebber(thanks stan) are trying to create a guestimate Q calculator. As you know the Q cannot be calcualted. But it is quite possible to guess depending on the film genre, to get a good estimate Q that should work. Now this calculator only
works if the following settings are correct:
The source must be DVD.
You must be using my guide.

Some ppl are going to be sceptic (hell, I am myself!). But I am hoping to get some ppl to test it for me on a few dvds. If you or anybody reading this would like to be a tester then mail me on muckians@gofree.indigo.ie .

it is illogical to use three discs AND VBR encoding

Are you sure you aint a Vulcan??!

Good luck,
Baker[/quote]

[catnip1]

Hello. I've been following this thread with great interrest but I have stumbled over something in the guide. What is IFO file. Do you have to specify it or should it be an option you can sellect? I was going to try this method but when I got to this point I wasn't sure what to do.

Thanks

D. E.

OOOOOpssssssss. Wrong forum....sorry

[vitualis]

Me and stanwebber(thanks stan) are trying to create a guestimate Q calculator. As you know the Q cannot be calcualted. But it is quite possible to guess depending on the film genre, to get a good estimate Q that should work.

Great. A library/look up table/guestimate program of Q values would be useful I think...

Good luck.

Regards.

[baker]

ARGGGG.

The database/calculator was working well.... then I tried an old film... The noise is what **** me up. U C old films weren't shot with fancy camers we have now a days and the film had a lot of noise. It was WAY off the target. I may reccomend that if the film is noisy no matter what the film genre action should be selected to combat the high noise level.

Baker