Strange Avi (Divx-Xvid) Video Slowdown after playing....

[Rochabian]

Hi!

I 've just discovered a strange issue.

When i play avi videos, it starts well when the overlay displaying the format of the video is shown ( Aspect Ratio 4:3 - Not Zoommed , for example)

But when this ribbon disappears, suddently the video is choppy, not the sound, just the image wich is slowed down and not in sync with sound

If i change the aspect ratio at this time, all become right again until the ribbon disappear......

Really strange because it just do this with avi files......

Other video formats are working well

I'm using W7 X64 and have tried with FFDshow & Shark Codecs, same things happen

I've noticed that avi files runs well in WMP or any other player,with FFDSHOW or Sharks so it's quite strange

Can someone confirm the problem or is it just my setup?

Can it be an overlay problem?

Thanks

[Rochabian]

After deeper tests, i've found the problem has to do with the "Do wait" Vsync in the tweak/performances configuration

With parameter on "don't wait" it works normally but the interface has some tearing during menu transitions

With parameter "do wait" i have video slowdown after the aspect ratio ribbon is gone.........

Can this be fixed or shall i keep the "don't wait" setting???

[nullPointer]

Hi Rochabian

What are the specs on your PC? Are you running a pretty modern system? I noticed this information pulled from the help text which leads me to believe that depending on your system this behavior may not be a bug, and may not be fixable as such

Normally GameEx waits for a vertical Sync of the display before drawing to the screen. This should offer smooth animation on fast PC's and is normally recommended. Although Waiting for a VSync takes takes up CPU cycles. It may also be a little pointless to wait for a VSync on older PC's where GameEx runs slowly anyway. Setting NoWaitVSync to true will make GameEx Update the screen whenever it can and may make GameEx run a little faster.

[Rochabian]

Quite modern, it's a Quad core Q6600 oc at 3.33Ghz with 4GB of ram, no problem for playing 1080p mkv files through gameex so i think it's not the problem

[Rochabian]

I have recently migrated my cab from XP to 7 X64 and i can see that codecs are not handled in the same way at all on the 2 OS

I'll try to disable MS Avi Decoder to see if it change something in Gameex

[Tempest]

In case you didn't know, when using Shark codecs on a 64bit system you need to install the 32bit codecs first and then the 64bit codecs. You should uninstall all other codecs first.

[Rochabian]

Yes i've done that and played a little bit with lavcodec settings

Now the slowdown is quite unnoticeable (but still here)

Perhaps with a more powerfull CPU i'll not see that but i found strange that it works full speed with the "aspect-duration ribbon" and then slowdown when it disappears.

Does it deals with Directx Hardware Acceleration or anything else, i don't know......

So not totally resolved but i've found a workaround