http://perian.org/

Perian enables QuickTime application support for additional media:

• File formats: AVI, DIVX, FLV, MKV, GVI, VP6, and VFW
• Video types: MS-MPEG4 v1 & v2, DivX, 3ivx, H.264, Sorenson H.263, FLV/Sorenson Spark, FSV1, VP6, H263i, VP3, HuffYUV, FFVHuff, MPEG1 & MPEG2 Video, Fraps, Snow, NuppelVideo, Techsmith Screen Capture, DosBox Capture
• Audio types: Windows Media Audio v1 & v2, Flash ADPCM, Xiph Vorbis (in Matroska), and MPEG Layer I & II Audio, True Audio, DTS Coherent Acoustics, Nellymoser ASAO
• AVI support for: AAC, AC3 Audio, H.264, MPEG4, and VBR MP3
• Subtitle support for SSA/ASS and SRT

Requirements: Mac OS X 10.4.7 or higher because 10.3 makes the iceweasel cower in fear.

Download Perian 1.1.4

Installation: Open the disk image and double click the Perian.prefPane icon.

• Perian can be used with all QuickTime-supporting apps, including QuickTime Player, NicePlayer, and QTAmateur.
• The Flip4Mac (Windows Media) and XiphQT (Ogg) components add support for some formats not included in Perian.
• The internet TV platform Miro and Airport Express streaming app Airfoil include Perian.

How do I remove Perian? Open the System Preferences. Select the Perian pane and 'Remove.' Now 'Show All' preference panes, control-click the Perian pane and 'Remove "Perian" Preference Pane.'

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10.6.4 & Win 7
GA-P55M-UD4 f10 Graphics via DSDT ~ i7 860 ~ GTS 250