slow playback on 1080p videos with COREAVC

[Lovertits]

That's the same thing I see in DXVA Checker.

I just played a 720p60 h.264/AAC TS video with MPCHC on another computer with a Core 2 Duo E6300 and Radeon 4850. With DXVA I saw around 4 percent CPU usage. Without DXVA CPU usage was around 60 percent. A 720p25 h.264/AAC MKV file used about 30 percent of the CPU with software decoding, 2 percent with DXVA. I don't know why you are getting such high CPU usage with DXVA.

Well i just tested a 720p24 x264/DTS/MKV/Kmplayer/VMR9 and getting 18-25 (without it, its 50-55, similar to yours without it). But i have an explorer.exe taking about 5-6 at the same time, so..i guess without that it'd be around 12-18. I cant close that though, because it kills the whole taskbar and systray, and its not worth disabling since it runs fine anyway.

Also tested a 720p60 MPG2/AC3/TS/Kmplayer/Overlay(get frame droppage in VMR9) and getting 30-35. Without it, its about 65 or so.

My system is a PentiumD Dual Core though (Smithfield 2.8ghz), its not a Core2 Dual Core, and well..im no expert, but i do think a Core2 and QCore is gonna need to be factored into the equation as to whats making the difference there.

Or let me ask you this. Is the gpu always supposed to offload the cpu in dxva to an extremely low percentage no matter what cpu you have? Cuz if thats the case, well, i guess we have our answer then

Also, on an unrelated issue, can you read this and perhaps throw in some input?

https://forum.videohelp.com/topic362149.html <id like to solve this once and for all, driving me bonkers.

[jagabo]

i have an explorer.exe taking about 5-6 at the same time

That doesn't sound right. All my systems flicker back and forth between 0 and 1 percent at idle. When playing video only the player shows any CPU usage. The rest is System Idle Process. Maybe your A/V software is hogging up CPU cycles?

My system is a PentiumD Dual Core though (Smithfield 2.8ghz), its not a Core2 Dual Core, and well..im no expert, but i do think a Core2 and QCore is gonna need to be factored into the equation as to whats making the difference there.

A 2.8 GHz Pentium D is very close to a 1.86 GHz Core 2 Duo most of the time.

Or let me ask you this. Is the gpu always supposed to offload the cpu in dxva to an extremely low percentage no matter what cpu you have? Cuz if thats the case, well, i guess we have our answer then :)

Well, the CPU still has to do some work. Reading the file, splitting the audio and video streams, decoding the audio, etc. Maybe you have the player set up to do lots of post processing?

Also, on an unrelated issue, can you read this and perhaps throw in some input?

https://forum.videohelp.com/topic362149.html <id like to solve this once and for all, driving me bonkers.

I'll address that issue in that thread. But maybe it's related to the Explorer CPU usage above?

[Lovertits]

I rebooted (i usually go days or even a week without doing it, so maybe something got hung up a bit, who knows hehe) and its now going up n down between 1-5 cpu usage, which is what it normally does when nothing else is being used. Explorer is now at 0. Im about 5% down from where it was.

Still, id like to use that VMR9 in MPG2 and WMV9 vids without the damn stuttering and dropped frames. :\

[jagabo]

Did you verify your hard drives are running in DMA mode? I'd try disabling any A/V software -- at least as a test (some will scan every file as it comes off the disk, greatly increasing CPU usage). Otherwise, I'm out of ideas!

[mr-scarface]

This is what DXVA checker shows:




It looks like H264 is supported in 1920x1080 right?

[jagabo]

Looks like you have DXVA support.

[nerys]

Hoping maybe you guys can help me as well. I have a similar problem of bad playback on my laptop. Now I HAVE played 720p and 1080p (with ok results 720p with great results) on this machine.

Has some issue reimaged the drive from my own backup and now I can not even get 720p video to playback properly (except nHD releases which I Love)

I for some reason am pegging he CPU. I have no idea why I know for a fact this system can play these files.

its an older Sager laptop. the beast unit.

2.8ghz P4 Desktop CPU
2gb DDR 266 Ram
Radeon 9000 (why oh why was I not telepathic to know 3 more months till the 9700 (I bought this back in 2002)
250gb 7200rpm drive

ANY ideas what I am missing? I have tried more codecs and software players than I knew existed. the best seems to be MPC with core avc

with that I can play the nhd 720p's and SOMETIMES regular 4.3gb 720p's

but most video runs slow and I get massive sync issues

its pegging the CPU at 100% which it has NEVER done in the past. (usuaally around 70% IIRC its been a long time since I checked and 1080p would be 95% to 100%

Suggestions? what can I check? (I am trying the KMPlayer now)

The disk is running in UDMA 5 I am running he files off the hard disk (I will try the optical drive but I imagine it woul not perform as well as hard disk access)

Thanks!

[nerys]

WOW what an improvement! JUST installing KMplayer. now playing 720p video is still a little high but MUCH closer to what I remember (71% to 82%) more than acceptable. I don't have any 1080p but since the 720p is running a wee high I imagine the 1080p will probably be a wee too much so I would still love to find out what is "different" between now and then.

Either way I am very pleased with KMPlayer. so far its performing quite nicely no stutters no sync issues (so far) I set it for peformance mode but the quality still looks spectacular as expected.

I am planning to build another one of these laptops eventually to use as an HTPC in the living room. Was getting concerned when it stopped playing 720p properly.

I wish I knew what I did before. Considering how BADLY all the other stuff runs the mkv files I imagine if I could get the system the way it was before AND add KMPlayer I might have better results with 1080p files as well !!

Its still not quite 100% though. I did find a few 720p files that still max the CPU. the nhd files are even better now 55-65% cpu usage (nice) with most right around 85% but a few still need too much and start to lose sync

Any suggestions would be greatly appreciated!

[jagabo]

Codecs and frame rate makes a difference. Divx/Xvid take about half as much CPU power than h.264 to play. 720p24 (typical DVD rip) takes only 40 percent as much CPU power to play compared to 720p60 (broadcast TV).

I don't see much difference in CPU usage between KMPlayer's built in h.264 decoder and CoreAVC or MPCHC's built in h.264 decoder. Same for Divx/Xvid. I would look elsewhere for your playback problems. Especially the video renderer module.

[mr-scarface]

Looks like you have DXVA support.

then it's gotta be a driver issue no?

Especially the video renderer module.

can you be more specific? Do I need to get a new one or change the one it's using? I believe i've tried a few already.

[jagabo]

KMPlayer doesn't use DXVA on its own, but I guess you've forced it to use the h.264 decoder from MPCHC. But you report that module is not using DXVA for some reason. I suppose that could mean some kind of driver compatibility issue. Just to be sure, you could try playing with MPCHC and make sure the h.264 DXVA module is being used. Also be sure the software h.264 decoder (ffdshow) is set to use 2 threads.

Yes, you said you already tried the VMR9, Overlay Mixer, and Halli renderers. So that's probably not the source of problem.

When you were using CoreAVC -- was it the pro version or the standard version? The standard version is only single threaded and probably won't play HD h.264 video smoothly on your system. And since it is only single threaded you would not see 100 percent CPU usage.