Re: Jittery text in successive PostScript sequences

I downloaded the file and asked vlc what's the resolution. I can still see the jaggies on the lines.That's probably all I know about your problem. Maybe by looking at two adjacent frames in PostScript, one could learn more. Bradley C Kuszmaul - via snartphone On Jan 23, 2018 4:53 PM, "Paul

Re: Jittery text in successive PostScript sequences

Quicktime says it is 2000x1250 and that is indeed the frame PNG dimensions - perhaps you are viewing it in a browser which shows it to be smaller. in my browser it looks much smaller as well. Anyway, we are trying to quantify if indeed it is -/+1 pixel which makes sense in terms of rounding. I

Re: Jittery text in successive PostScript sequences

This video is only 800x500, and the jitter's amplitude appears to be one pixel. On Tue, Jan 23, 2018 at 3:52 PM, Paul Wessel wrote: > Seems resolution independent; I've tried up to 4K. Here is a 2000x1250 > MP4 movie, just showing the text HELL. It is especially noticeable for > angles 20-30. >

Re: Jittery text in successive PostScript sequences

Seems resolution independent; I've tried up to 4K. Here is a 2000x1250 MP4 movie, just showing the text HELL. It is especially noticeable for angles 20-30. www.soest.hawaii.edu/pwessel/bug.mp4 > On Jan 23, 2018, at 5:59 AM, Bradley C. Kuszmaul

Re: Jittery text in successive PostScript sequences

It looks like even the straight lines and circles have jaggies, and your jittering looks like it's just jaggies spread across the time domain. I don't think you can expect it to look good at such low resolution without taking a lot more care about anti-aliasing. Can you increase the resolution? B

Re: Jittery text in successive PostScript sequences

Hi Mr. Wessel, Ghostscript is written by Artifex Software: https://artifex.com/ I believe they run a website here: https://ghostscript.com/ for the main Ghostscript product along with mailing list(s). This mailing list is for an old GNU copy of Ghostscript back when they went from regular GPL to

Re: Jittery text in successive PostScript sequences

Sorry, should probably state what our final gs command is. Here is one (building a tif): gs -q -dSAFER -dNOPAUSE -dBATCH -dPDFSETTINGS=/prepress -dDownsampleColorImages=false -dDownsampleGrayImages=false -dDownsampleMonoImages=false -dUseFlateCompression=true -dEmbedAllFonts=true -dSubsetFont

Jittery text in successive PostScript sequences

Hi developers- GMT (gmt.soest.hawaii.edu ) is using PostScript to make plots and one application builds an animation from sequences of PostScript plots converted to PNG with ghostscript (9.22) and then to MP4 with ffmpeg. We have found a problem that may be a ghos