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Tearing when playing large GIFs

Posted: Sun Feb 16, 2014 6:50 am
by Lemons22
I use XnView primarily as a GIF viewer, and for 99% of GIFs it works just fine, but when I try to play large GIFs...say 800x800 pixels I get a lot of tearing. I know the tearing isn't part of the GIF as well because when I open them in Firefox they play just fine. Is there some option or plugin I can enable to stop this? I love the player as it is the only one I've found that handles virtually every type of GIF well...it just has this one flaw that I want to fix. Thanks.

Re: Tearing when playing large GIFs

Posted: Sun Feb 16, 2014 8:17 pm
by xnview
could you send me a test file?

Re: Tearing when playing large GIFs

Posted: Sun Feb 16, 2014 9:14 pm
by Lemons22

Re: Tearing when playing large GIFs

Posted: Tue Feb 18, 2014 2:40 pm
by xnview
it plays fine, but perhaps my computer is too fast...

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 1:07 am
by Lemons22
Well perhaps I will try it on my laptop, but the GIF plays fine in every other viewer I've tried and I have a very top-of-the-line computer. I will edit this post when I've tried it on my laptop.

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 9:44 am
by thibaud
xnview wrote:it plays fine, but perhaps my computer is too fast...
Pierre,
did you compare it (side by side) with other viewers ?
When testing this gif (I didn't try any other ones) xnviewmp playback rates is significantly slower than chrome of firefox.

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 11:53 am
by xnview
yes right, a little slower from firefox, but the same with other viewers. Strange... Perhaps 40ms is too quick for ui/event environment...

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 1:21 pm
by DOS386
xnview wrote:it plays fine, but perhaps my computer is too fast...
No problem here ... plays fine (and my computer is slowwwwwwwwwww).

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 1:47 pm
by thibaud
DOS386 wrote:
xnview wrote:it plays fine, but perhaps my computer is too fast...
No problem here ... plays fine (and my computer is slowwwwwwwwwww).
The question isn't if it plays fine, but rather if the playback rate is correct.
ie, firefox, chrome all plays it at a common faster rate. I didn't investigate which is the proper speed..

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 7:41 pm
by Lemons22
thibaud wrote:The question isn't if it plays fine, but rather if the playback rate is correct.
ie, firefox, chrome all plays it at a common faster rate. I didn't investigate which is the proper speed..
Honestly I don't care about play rate. To me the play rate seems the same as it is in FF. I made this topic because of tearing. I mean...how long are you guys looking at the GIF? Like 3 seconds? It can go a few cycles looking fine and then BAM...tearing...you guys know what tearing is right? It's like when you can see two frames on the screen at once.

http://en.wikipedia.org/wiki/Screen_tearing

Also, I tried this on my laptop and got the same effect, so it's definitely not a problem inherent to my computer alone.

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 7:53 pm
by thibaud
Alright sorry I though you where perhaps referring to the play back rate.
if you have v-sync issues you should probably check out your graphic adapter v-sync settings.

Re: Tearing when playing large GIFs

Posted: Thu Feb 20, 2014 8:43 pm
by Lemons22
thibaud wrote:Alright sorry I though you where perhaps referring to the play back rate.
if you have v-sync issues you should probably check out your graphic adapter v-sync settings.
I've fiddled with my graphics settings already to no effect, plus, as I've said, the GIF plays well in multiple other viewers (Irfanview, FastStone, Firefox, Chrome, etc.). I think it's safe to say at this point the problem is with XnView specifically.

Re: Tearing when playing large GIFs

Posted: Tue Mar 12, 2019 4:11 pm
by Asday
Ooft this thread died a death 5 years ago and the problem still exists, huh? Top result when looking on Google, too.

Y'all wanna fix it at some point, or...?

Re: Tearing when playing large GIFs

Posted: Mon Mar 18, 2019 11:53 am
by xnview
Asday wrote:
Tue Mar 12, 2019 4:11 pm
Ooft this thread died a death 5 years ago and the problem still exists, huh? Top result when looking on Google, too.

Y'all wanna fix it at some point, or...?
do you have a gif sample?

Re: Tearing when playing large GIFs

Posted: Mon Jul 15, 2019 12:12 am
by Squirrelly
It doesn't happen a lot but I found one showing it for me:

https://www.derpibooru.org/1159933

Download the full 1920x1080 version. I'm viewing it with XnView Classic (2.48) at 200% windowed (not full screen) on a 4k tv screen. I have a new PC with a GTX 1060 video card and SSD hard drive. So not an old PC issue at least.

For me the tearing is showing up around 1/4 down, so you can most easily see it in the vertical lines of the middle character's moving arms. It may vary for others.

I did manage to capture an image with my camera phone. So can see what I'm seeing. I wasn't holding the camera level. The tear line is actually straight across. You can compare with what are supposed to be horizontal lines at the bottom of the image.

Image

I'm not dying over it, but hope the info helps. It is minimally annoying if you're watching an animated gif like that for a while. Still loving XnView as my favorite image viewer. :-) Thanks!