Divx decoding works in mpc but not in gbpvr, not sure why :(

[Loomy]

I tried every video output setting in PVRX2 (the VMR9 options, VMR7, and Overplay), but divx video has color shifting. Constant flickering of the picture changing reddish-normal-greenish. But MPC set to use the last option of "VMR9 renderless" works fine.

It's just XP and a Radeon 8500 to a DVI display. I tried Klite and CCCP codec packs.

When I check the ffdshow video settings on output, both PVRX2 and MPC appear to look the same.

GBPVR works fine on my other PC -- what am I missing on this one?

[sub]

Its probably worth trying a different xvid/divx decoder. Try the one from here http://www.free-codecs.com/download/Koepi_XviD.htm

[Loomy]

Its probably worth trying a different xvid/divx decoder. Try the one from here http://www.free-codecs.com/download/Koepi_XviD.htm

So I tested and tested with different codecs and splitters and windows installs and can not figure out why GBPVR is playing video differently than MPC. It appears to be doing the exact same thing with the exact same stuff, so why the different output!

Then I noticed the craziest thing: mousing over the close window button (and maximize and restore) of PVRX2 makes the video color switch to the way it should look. Mousing off reverses this. It's the craziest thing. I have no idea what it means, but it should be enough to point you in an interesting direction!

[Loomy]

Okay after some testing:

With gbpvr and mpc set to use vmr9, the two gbpvr apps will have color shifting, but mpc will not.

With gbpvr set to use overlay, the gbpvr output looks the same as the mpc output set to vmr9.

.: I suspect that perhaps some part of mpc is seeing that vmr9 is not working properly, and is actually falling back to use overlay. Is this possible?

I installed a geforce2 and while it only supports vmr7, this does work with pvrx2.

I tried the newest, the oldest, and a tweaked omega driver version of the 8500 drivers. I tried different windows installations. I tried different agp settings. No apparent change.

So it seems like either something is breaking between gbpvr and the 8500 driver, or maybe the 8500 itself is broken?

[zehd]

Okay after some testing:

With gbpvr and mpc set to use vmr9, the two gbpvr apps will have color shifting, but mpc will not.

With gbpvr set to use overlay, the gbpvr output looks the same as the mpc output set to vmr9.

.: I suspect that perhaps some part of mpc is seeing that vmr9 is not working properly, and is actually falling back to use overlay. Is this possible?

I installed a geforce2 and while it only supports vmr7, this does work with pvrx2.

I tried the newest, the oldest, and a tweaked omega driver version of the 8500 drivers. I tried different windows installations. I tried different agp settings. No apparent change.

So it seems like either something is breaking between gbpvr and the 8500 driver, or maybe the 8500 itself is broken?

If I understand it, Media Player Classic and also VLC are players that use their own built in codecs. I would say that means you would be comparing gb-pvr to mpc, like apples to oranges..

I would suggest using Windows Media Player and GSpot to help you see what codecs are being called during the playback process. Also, I haven't used it, but I believe graphedit would be helpful to analyze what's going on...

[Loomy]

Nope I disabled the internal filters in the mpc options, so it should be doing everything with the system defaults 0o

[zehd]

Nope I disabled the internal filters in the mpc options, so it should be doing everything with the system defaults 0o

Well start looking into the graph with graphedit and gspot

[Loomy]

Well start looking into the graph with graphedit and gspot

I don't know what you mean by that, can you explain? If you mean check to make sure that GBPVR is using the decoder I think its using, I've done that much with the CCCP insurgent app.

Basically it comes down to this:

I don't see any problems with mpc or zoomplayer when they are using the codecs in question. I do see problems with GBPVR.

The problem with fullscreen GBPVR goes away temporarily when I press the start button or mouse over window widgets when using advanced xp themes. This makes the color shifting stop for the duration of the focus change. The color shifting happens with FFDSHOW decoding. I believe the same happened with xvid.

When using the latest official DIVX decoder, the video was flipped upside down in GBPVR. Mpc and zoomplayer worked correctly.

Some configs during testing made GBPVR stretch the test xvid file into a broken aspect ratio. Mpc and zoomplayer worked correctly in those cases.

A linux livecd with codecs and video player built in had no problems decoding and displaying the test files properly.

Between the video driver and the codec system and GBPVR, something is definitely off!

[sub]

I'm guessing its something to do with you videocard's drivers not correctly supportintg Direct3D, which is used for the renderer in PVRX2 (via VMR9 Custom/FSE). Those other apps dont use Direct3D based renderers, which is most likely why you're not seeing the problem there.

I cant really think of anything you can tweak at the GB-PVR end that might help with this. You could maybe look for different versions of your videocard drivers.

[Loomy]

I'm guessing its something to do with you videocard's drivers not correctly supportintg Direct3D, which is used for the renderer in PVRX2 (via VMR9 Custom/FSE). Those other apps dont use Direct3D based renderers, which is most likely why you're not seeing the problem there.

I cant really think of anything you can tweak at the GB-PVR end that might help with this. You could maybe look for different versions of your videocard drivers.

I've tried the latest, the oldest, and the middlemost drivers for this card, BTW.

I definitely think there is something off with the video drivers. But GBPVR is acting differently than the other players when they're all set to do the same thing. So there's something going on outside of the user-configurable options.

I cant really think of anything you can tweak at the GB-PVR end that might help with this.

I'll tell you what, have a look at the ADVANCED playback options of zoomplayer. There you see most of the options of MPC, all of what GBPVR offers, plus a whole bunch more.

One option fixes a problem where VMR9 flips the image upside down (this is a problem I have with GBPVR). Another says it fixes a problem where VMR9 distorts the aspect ratio (another problem I have with GBPVR). It also describes the different VMR features differently, perhaps in more detail. Renderless, Windowed, Windowless...

So I do think that something in the system isn't up to spec (video card and drivers). But mpc and zoomplayer both show that it is possible to work correctly under those conditions..