1080i playback choppy regardless of decoder

[pBS]

umm, for coreavc have you tried turning on hardware deinterlacing? takes a lot of load off cpu..[deinterlacing is 80+% of decoding] should bring to below 50% cpu..

for ffdshow to get smooth plus a little accell, go to output settings and select ONLY nv12 as colorspace,deselect all others, and check 'set interlaced flag in output', and set to 'bob' or 'auto' if you have newer ffdshow ver. [latest tryouts have added this feature]

my cpu usage on a 1.6 c2d is about 35% w/ffdshow..about 15% w/avivo..
but both look fabulous and i can't even tell difference...

i'd advise you to get dxvachecker, it will go a long ways towards helping you figure out what's really going on, and what really works..i find it invaluable..
plus he updated it recently with new features, like being able to tweak ati driver settings
[and g45 and others!]

it also shows you the capabilities of the decoders you use...and lets you try them out in the various modes quickly...
try to get a combo that works w/ both decoder and processor devices=full acell.
processor device =deinterlacer
decoder device= decoder [motion comp.ildct,etc.]

in my experience, hardware deinterlacing is a must...
decoding isn't hard for modern cpus, but is nice if you can get it working w/gpu..
but really isn't necessary..you see mpv is great at decoding,just doesn't deinterlace right..
[mpv is all cpu]

btw, i'm using pdvd8 only for h.264 w/accell in pvrx2... seems to work fine w/low cpu usage..ffdshow .264 isn't quite there yet..i just use it for mpeg2..
but i'm using 'real' powerdvd codec, not parts ripped and put in codec pack..may make a difference..
[rippers aren't very diligent]

on another note, i had to add a filter to get cyberlink pdvd8 to work w/bluray rips..
had to add "CyberLink Video/SP BD-HD Decoder (PDVD8)" to list of supported h264 decoders to get it to work right..
[and select it for preferred]
i'm about to test Avivo w/h.264 now, as it says it can accell it...tho only in 720x480?!

[johnsonx42]

Pob, thanks for the info on CoreAVC, but I see now it's only for h.264 stuff - broadcast HD here on this side of the pond is all mpeg-2.

I think I'll look more into getting ffdshow to function, whilst holding my breath for an updated driver from ATI.

I wish I had another video card that would be usable in my HTPC, but the available choices are either incompatible (ATI 9600 and 9500pro, both AGP), too loud and/or need too much power (X800XL PCIe and 7900gs PCIe), or too slow (FX5200 PCI).

[pBS]

oops, was playing a mpeg2 transcode of that bluray file...sorry..LOL
trying now with real h.264
not good on 1550...choppy, but so is coreavc too..
[converted a blueray to mpeg2 w/ffmpeg and it looks excellent...and only 4 gigs compared to 33 originally..]

so, turns out the h.264 in avivo is only the low end ipod type...no full frame available..720x480 max...
[has a different clsid also]
but even on my x1550 the 1080p mpeg2 was silky smooth...it was *never* that good before 8.11!

the 3450 shows full h.264 and vc1 up to 1080p..