Theunis Potgieter Said:
I think it is your card that is the problem shows that is should support up to
VP1, however if you look at mythtv's guide: it starts only at series 8 and newer.

It seems that your card can then only support xvmc for mpeg2 codec only. :(

Buy a a new 8400 GS (old brand model name but new architecture G98
chip) as indicated here

I've tried it in my production machine now, which has this card:
03:00.0 VGA compatible controller: nVidia Corporation GeForce 8400 GS (rev a1) (prog-if 00 [VGA controller])
       Subsystem: Giga-byte Technology Device 3463
       Flags: bus master, fast devsel, latency 0, IRQ 16
       Memory at ea000000 (32-bit, non-prefetchable) [size=16M]
       Memory at d0000000 (64-bit, prefetchable) [size=256M]
       Memory at e8000000 (64-bit, non-prefetchable) [size=32M]
       I/O ports at b000 [size=128]
       [virtual] Expansion ROM at eb000000 [disabled] [size=128K]
       Capabilities: [60] Power Management version 2
Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Count=1/1 Enable-
       Capabilities: [78] Express Endpoint, MSI 00
       Capabilities: [100] Virtual Channel <?>
       Capabilities: [128] Power Budgeting <?>
       Capabilities: [600] Vendor Specific Information <?>
       Kernel driver in use: nvidia
       Kernel modules: nvidiafb, nvidia

And while vdpau does work now, I get little CPU improvement (drops from ~60% under xv to ~45% on vdpau), there's some tearing during action scenes and some image freezing for a few seconds when switching from live TV to recordings which I've had to "kill" on occasion.

Currently I only have SD content to watch and my Sony Bravia 32V only supports up to 1360x668. Any point using vdpau?

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