Not able to run .MKV files properly

[Ab Aeterno]

It gets pixelated when a lot of things start moving in the video.

I can run AVI, and MP4 just about fine..What could be the problem?

I'm a complete newb btw.

[aedipuss]

i'll assume you didn't create it. could be too low or too high a bitrate or just a bad video. hit the delete button.

[Ab Aeterno]

i'll assume you didn't create it. could be too low or too high a bitrate or just a bad video. hit the delete button.

That's not possible, I've tried other .MKV files, they just don't work. Based on feedback, the files work for everyone else. There's gotta be something wrong.

[El Heggunte]

There's gotta be something wrong.

Indeed there is, you don't give us sufficient info:

Player(s) you're using/have tried.

Filters used by the player(s).

Details about your machine, including the operating system.

A Mediainfo report about the "problematic" files.

[Baldrick]

Have you tried different video players like VLC Media Player?

[Ai Haibara]

Start by telling us what you're using to play the MKVs (if a computer, list computer specs, not the computer's name, and include the OS). If you're on a computer, what software are you using to play the video? What codecs and splitters do you have installed, if you're not using a self-contained player like VLC to play the video)?

HD-format video can often require a LOT of computer power, so if you're using an older system, it might not have enough to play the video correctly.

It also might help to see a MediaInfo (text-form) report on one of the MKVs you're trying to play.

Edit: ...yeah, I know El Heggunte asked some similar questions... that's what I get for taking too long to type.

[Ab Aeterno]

I'm using VLC media player

------------------
System Information
------------------
Time of this report: 8/19/2013, 14:17:15
Machine name: XXX
Operating System: Windows Vista™ Home Premium (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.080425-1930)
Language: English (Regional Setting: English)
System Manufacturer: TOSHIBA
System Model: Satellite M300
BIOS: PhoenixBIOS 4.0 Release 6.1
Processor: Intel(R) Pentium(R) Dual CPU T3400 @ 2.16GHz (2 CPUs), ~2.2GHz
Memory: 2936MB RAM
Page File: 2960MB used, 3121MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6001.18000 32bit Unicode

I have deleted the MKV file, I'll re-download though