Prepressforums.com

grahamjones · #1 (**permalink**) 04-26-2006, 01:32 AM

When we send over poscript files larger than 500mb to Trueflow they hang at the input stage.

If we break them down to <500mb chunks the files work fine. This however means spending time on supplied jobs which is money down the drain.

Does Trueflow have a maximum file size?

We are using Trueflow 3.10

Ta!

svenscreenfreak · #2 (**permalink**) 04-26-2006, 02:21 AM

Is there a reason why you're working with postscript files? Why don't your distill to pdf, and use pdf in trueflow...

grahamjones · #3 (**permalink**) 04-26-2006, 02:53 AM

We use postscript files because thats how we were trained by Screen UK.

We use pdf files when supplied by clients.

We create the postscript files printing from Quark using a printer description set up by the chaps from Screen UK.

We haven't tried a pdf file >500mb to see if that works yet.

svenscreenfreak · #4 (**permalink**) 04-26-2006, 06:18 AM

distilling your postscripts will make life in trueflow much easier for you guys!But be sure to use the correct distiller profiles, you can download it here :

http://www.gwg.org/en/specifications...ai n=2&sub=36

go to the adobe acrobat distiller section and download the desired settings, (distiller 6 or 7, mac or windoze) unzip and drop 'm on your distiller window. I don't quite understand why the peepz at screen uk propose the ps-flow. The pdf's you'll get out of distiller will be more than below 500mb and will process super quick in trueflow 3.1.
Keep me posted!

Rickyp_uk · #5 (**permalink**) 05-03-2006, 12:14 AM

Don't know how long ago that screen training was but we've been down to Milton keynes twice since version 2 and both times they were recommending distilling to pdf (the only difference between 2 and 3 was that they jumped on the pdfx1a wagon). The issue with it hanging may be with the max tasks allocated in 'trueflow manager' but if its a older spec pc it could be down to the processing power.
Overall i'd defo start goin down the pdf workflow path

grahamjones · #6 (**permalink**) 05-03-2006, 01:34 AM

Training was in November of last year. Trueflow is version 3.10 and the server is a dual xeon 3.2ghz with 3gig of ram. Started using pdf's instead of postscript now and things have improved!

svenscreenfreak · #7 (**permalink**) 05-03-2006, 01:51 AM

glad to hear that!
enjoy your pdf workflow!

Nellster · #8 (**permalink**) 08-07-2006, 12:14 AM

I have used 900mb pdf files with no problems so far.

GJF · #9 (**permalink**) 02-22-2007, 11:04 AM

Hi

I read here about distilling Ps files to pdf and inputting those in trueflow instead of the large Ps files, and have done so for a while now with jobs that are over few hundred Mb and getting extremley smaller file size pdfs and been happy enough with the results, so thanks for that as they rip very much quicker.

Most of the jobs have been jobs with standard types of pics but i've had this job recently that has a canvas bag with a zip on it, in the pic it has a texture to the material of the bag, and on distilling the Ps using the Ghent settings the texture totally dissapears and the zip loses definition, so i tried normal adobe Press Quality setting and was exactly same,. then tried trueflowPDFX1a setting(i assume was in the list because of indesign) and the texture and zip looked fine although the pdf was much larger, ive included a link to a pic if it helps, but I was wondering if I should use the trueflowPDFX1a setting from now on instead of Ghents as it seems the quality of the pics would be better possibly due to compression settings and thats probly why the pdf was larger, anyone have any thoughts on this, would be grateful for any advice or info, thanks

from the 80mb ps file
Ghent pdf distilled to 1.2mb
press quality distilled to 1.2mb
trueflow setting distilled to 16.9mb

http://mysite.orange.co.uk/gazguitar...bs_of_pdfs.jpg

mattbeals · #10 (**permalink**) 02-22-2007, 11:25 AM

It would appear that JPEG compression is the culprit here. Based on what I see here I would go with the Trueflow settings.

What you could do is look at the settings for Ghent and press quality and see what JPEG level of compression they are using as well as the down sampling.

I love High Quality settings. The only thing that makes it a bit "weird" is that is leaves RGB as RGB. Otherwise functionally it is the same as Press Quality. But they should use down sampling of images over 450 dpi down to 300 dpi and high quality JPEG.

JPEG is JPEG though and I'd get rid of it and use flate/ZIP compression instead.