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I have some .mkv 1080p videos but VLC can't play them smoothly.

If I open the Task Manager, I can see that CPU is at 100%, because VLC uses as much as it can (95% or more).

Then, I wonder

  • Is it a CPU problem, because it's slow?
  • Is it a GPU problem because it isn't so good, so the CPU must do all work?
  • Is it a player problem, because it's a VLC bug, or it doesn't use the right codec, or doesn't support hardware acceleration?
  • Is it a OS problem, because XP it's too old?

I have:

  • CPU: DualCore AMD Athlon 64 X2, 2200 MHz (11 x 200) 4200+
  • GPU: nVIDIA nForce 6100-430
  • Player: VLC v2.0.5
  • OS: Windows XP SP3
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2 Answers

up vote 3 down vote accepted

VLC uses the CPU heavily, you can find other players that utilize the GPU better. Daum PotPlayer, SMPlayer, Gom Player. LifeHacker Link

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PotPlayer uses 100% CPU too, but it plays the video smoothly, thanks –  Oriol Feb 20 '13 at 0:21
    
VLC can offload decoding to the GPU where supported by drivers and video card - wiki.videolan.org/VLC_GPU_Decoding. If your video is slow, you probably need to find video acceleration drivers for your Video card (or get a new one if your card does not have GPU acceleration) –  davidgo Feb 20 '13 at 9:06
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Your GPU doesn't support accelerated HD decoding. More recent GPUs can handle HD decoding and are much more efficient at this than CPUs.

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Thanks, I will take it on account when I update my computer. But meanwhile, I prefer Ryan E's answer, it's cheaper :) –  Oriol Feb 20 '13 at 1:07
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