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Old 07-09-09, 12:44 AM   #1
Alfiegerner
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Default 9400GT or 8400GS PCI for vdpau (xbmc)

Hello,

I'm about to buy a PCI card so I can playback NZ freeview HD through XBMC. I've narrowed the choice down to either a 8400GS or a 9400GT.

Would either of these work just as well?

I'm slightly confused because the 9400GT looks like it has better specs but there's a few posts around suggesting it might cause issues. Maybe these have been ironed out in the latest driver releases?

I'm also confused why the 8400GS costs more than the 9400GT but hey-ho, I'm not too bothered about that.

Any thoughts on which of these cards works better for VDPAU (and also if you know how they get on with xbmc) would be much appreciated.

Thanks,
Alex
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Old 07-09-09, 12:51 AM   #2
Sky777
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

imho - 8400 is better because has G98 GPU
on ebay or amazon you can buy this card twicw cheaper than on your link
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Old 07-09-09, 01:03 AM   #3
Alfiegerner
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

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Originally Posted by Sky777 View Post
imho - 8400 is better because has G98 GPU
on ebay or amazon you can buy this card twicw cheaper than on your link
Thanks for the heads up - would love to get it cheaper but I need to find someone who could ship it to NZ for me. So far that shop is the only place I've found that will ship it out here.

So even though the 9400GT has much better specs the 8400 is better for VDPAU? I'm a little new to this - does that mean that 9400GT is better for gaming but I'm better off with the 8400GS if I'm just after HD playback?
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Old 07-09-09, 04:52 AM   #4
thefirstm
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

Does PCI have enough bandwidth to transfer HD video over it? In the past, I have had trouble playing regular SD DVD video (720x480) on a system with the PCI video card. I had to tell the owner to get an AGP card.

Wait, do you mean PCIE? If so, that is a different story.
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Old 07-09-09, 05:51 AM   #5
Alfiegerner
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

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Originally Posted by thefirstm View Post
Does PCI have enough bandwidth to transfer HD video over it? In the past, I have had trouble playing regular SD DVD video (720x480) on a system with the PCI video card. I had to tell the owner to get an AGP card.

Wait, do you mean PCIE? If so, that is a different story.
Nope I don't mean PCI-e, I mean PCI, old school 2.1 interface. I've never used a PCI card before but as far as I can tell (googling) the 8400GS and the 9400GT PCI cards should be able to playback h.264 hd, even 1080p.

I may be wrong though. Would be good to get some opinions before I shell out.
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Old 07-09-09, 06:13 AM   #6
cehoyos
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

Quote:
Originally Posted by Alfiegerner View Post
Hello,

I'm about to buy a PCI card so I can playback NZ freeview HD through XBMC. I've narrowed the choice down to either a 8400GS or a 9400GT.

Would either of these work just as well?
Both work.
A few notes:
On a very slow computer (< 1GHz), the 8400GS PCI can still decode MPEG 1/2 and VC1 (=WMV3) for high resolution, that is not possible with the 9400GT (that also uses the CPU for these codecs), H264 (= NZ freeview HD) is no problem for both.
De-interlacing of HD material is definitely impossible with the 8400GS PCI, it should be possible with the 9400 GT PCI (works for me).
The power consumption of both cards probably exceed the original PCI specification (however, this is no problem on my Pentium III 500).
The 8400GS cannot decode the following horizontal resolutions for H264: 784, 864, 944, 1024, 1808 and 1888 pixel
And I remember some people complaining the NZ freeview HD is difficult to decode for open source programs (audio problems?)

You might be happier with the 9400GT, Carl Eugen
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Old 07-09-09, 06:48 AM   #7
motd2k
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

Quote:
Originally Posted by thefirstm View Post
Does PCI have enough bandwidth to transfer HD video over it? In the past, I have had trouble playing regular SD DVD video (720x480) on a system with the PCI video card. I had to tell the owner to get an AGP card.

Wait, do you mean PCIE? If so, that is a different story.
Its the compressed bitstream that is going over the bus, should work fine.
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Old 07-09-09, 12:50 PM   #8
Sky777
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

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Originally Posted by cehoyos View Post
De-interlacing of HD material is definitely impossible with the 8400GS PCI, it should be possible with the 9400 GT PCI (works for me).
why do you think so ? I have 8400 PCI card and on 1080i video the bob and half temporal works fine on my Sempron 2800
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Old 07-09-09, 03:25 PM   #9
Alfiegerner
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

Good news, thanks for the feedback everyone. All being well I'll be getting me the 9400GT and enjoying HD on it soon. Cheers
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Old 07-09-09, 05:06 PM   #10
cehoyos
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

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Originally Posted by Sky777 View Post
why do you think so ? I have 8400 PCI card and on 1080i video the bob and half temporal works fine on my Sempron 2800
While it is true that I forgot bob works for some HD videos, I did not think of it because of the huge quality difference temporal VDPAU de-interlacing makes.
If "half temporal" means "half-rate temporal" as it is called in the VDPAU documentation, it simply means that every second field is thrown away - I do not think that counts as de-interlacing. (And yes, I still used the term de-interlacing when writing the MPlayer documentation for weave, but that does not make its quality much better.)

Carl Eugen
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Old 07-11-09, 04:36 AM   #11
Sky777
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

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Originally Posted by cehoyos View Post
Both work.
De-interlacing of HD material is definitely impossible with the 8400GS PCI, it should be possible with the 9400 GT PCI (works for me).
and what about 8400GS PCI-E ? should vdpau de-interlacing (temporal, temporal spatial) work with it ?
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Old 07-11-09, 05:25 AM   #12
cehoyos
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Default Re: 9400GT or 8400GS PCI for vdpau (xbmc)

Quote:
Originally Posted by Sky777 View Post
and what about 8400GS PCI-E ? should vdpau de-interlacing (temporal, temporal spatial) work with it ?
Should? I have no idea.
If it actually works? At least not for HD (1080) videos with real-life bit- and frame-rates.

Carl Eugen
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