HD1080 playback audio skips/out of sync

keyser

keyser

keyser

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re topic. My cpu usage is 80/90% Doesn't happen with all HD movies, just some. My mate has no problems with playing them, he's got E8400 and 4870 though. Did I read somewhere that it might be my gfx card hardware playback?
 
Looking at your system I'd say its more likely to be your CPU thats holding you back, the gfx card should be fine, though tbh I'd of thought your CPU would too. What format are you watching the HD movies from? Discs or downloads?
 
try switching off the hardware playback and see how the software handles it, and let us know what happens

Stelly
 
How do I disable hardware playback btw? The videos are on my hd yeah. I'm using Combined Community Codec Pack with mpc. Although Zoom player is the same and vlc only uses 50% cpu and is even worse.
 
I have an old P4 3GHz with a Matrox card with no hardware acceleration and used to have this problem playing 720P with the CCCP pack. After installing CoreAVC I can just about play 720P fine if I don't have too much else running. Give the 14 day trial a go and see if it's decoding makes enough difference to sort out your playback.

http://www.coreavc.com/

At only $8/15 it could be a cheap solution but it's only good for H.264 video, but this is most common HD codec anyway and VC-1 is meant to require less decoding power as it is.


As to how to turn off hardware acceleration if you want to give that a try let us know if you are using XP or Vista (or Google is your friend.)
 
Only happening sometimes suggests the encoding of the HD content is changing, some being supported by your hardware or software others not.

Usually hardware accelration is on by default in the graphics driver but you also have to tell the player to enable it or to compensate for audio sync

Try and work out which content works best, please bear in mind that a lot of formats like avi are just wrappers for content that can be encoded in several different ways and you occasinally have to use software to find out what the wrapper actually contains in order to work out why your having problems.

The soundcard driver or selected options is another prossiblity by the way.

Theres quite a few commercial codecs avilabel as trials as well
 
What player you are using and what codec packs you have installed could actually be a good place to start.

Always remember to try and provide as much information as possible.
 
I think its just my cpu is on the limit of playing back some videos. I had the same issue with a different video, but managed to fix it by closing firefox. However, even with everything closed the problem still remains with these few videos (all encoded in the same format/bit rate/way). Maybe new cpu (and mobo, ram.. pc!) time, thanks.
 
I find MPC uses very slightly less resources than Zoom, but not much.

For H.264 files CoreAVC is a lot more efficient than ffdshow at decoding files. I would suggest trying the 14 day trial and see if you can play the files with no stuttering using that. Far cheaper than upgrading any hardware if it solves your problem!

As I said I had the same problem with 720P on my ancient system with CCCP and MPC but am fine using CoreAVC. It really is that much better at H.264 decoding.
 
keyser said:
I think its just my cpu is on the limit of playing back some videos. I had the same issue with a different video, but managed to fix it by closing firefox. However, even with everything closed the problem still remains with these few videos (all encoded in the same format/bit rate/way). Maybe new cpu (and mobo, ram.. pc!) time, thanks.
Click to expand...

My media pc with a pentium 805 dual core and ati 2400 does ok for 720p and 1080 content all problems have arisen with codecs and their settings (and occisioanally ati new drivers. I dont do fancy audio though
 
Yeah use CoreAVC, should be much better. Cyberlink decoder only works for blu-ray/hd-dvd, not mkv files. There is currently no way to accelerate mkv files with the GPU iirc.
 
darwinws said:
There is currently no way to accelerate mkv files with the GPU iirc.
Click to expand...

That surprises me. I would have thought the OS would know how to treat it once it has been split from the mkv container and treat the contents the same as it would had it been a h.264 file from a real media device (Blu-Ray.)

I have no experience with this though, just don't see why it should be any harder from a file than from a disk drive. Hopefully something that will be fixed soon if this is the case...
 
This report seems to show that hardware acceleration does work with files from the PC. H.264 from .mp4 and MPEG2 from .mkv both tested (although not h.264 from .mkv which is most common.) It is old though and maybe a little out of date.

http://ixbtlabs.com/articles2/video/video.dec.2007-page1.html

Also seems that PowerDVD from CyberLink is about the only software decoder with decent hardware support, but again that may of changed by now. Almost certain that CoreAVC still doesn't and ffdshow almost definitely doesn't support it.
 
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