slow seeking of VC1/wmv3 in MPC with Codec Pack

Hi, I am consistently having slow-seeking issues with MPC and the Mega Codec Pack. For the same file, I find that SMPlayer and VLC can jump ahead or back quickly and with no freezing, whereas MPC takes several seconds, sometimes many seconds. Are there settings I can tweak to improve the seek-times in these files? I really prefer the picture quality of MPC with the Codec Pack and would be happy if I could use it to play all my files. But I find I have to turn to the aforementioned other players when I want to navigate through VC1 files quickly. Thanks for any suggestions. Below is my log from the Codec Tweak Tool.

Codec Tweak Tool | Log file | Generated at 2013-09-30 21:11:41


##### System Information #####

OS: Windows (TM) Vista Ultimate (6.00.6002) (x64)
DirectX: 9.0c + 10 + 10.1 + 11
CPU name: Intel(R) Core(TM)2 Extreme CPU Q9300 @ 2.53GHz
CPU speed: 2527 MHz
Memory: 4096 MB
Screen size: 1920x1080 (32bits) (60Hz), 1600x900 (32bits) (60Hz)
Video card: NVIDIA GeForce GT 130M
VendorID: 10de, DeviceID: 0652, SubSys: 3610103c
Video mem: 1024 MB
Video driver: nvd3dumx,nvwgf2umx,nvwgf2umx (Version 314.07)
Audio device: NVIDIA High Definition Audio
Audio driver: nvhda64v.sys (Version 1.3.23.1) (12-18-2012)

##### K-Lite Codec Pack #####

KLCP version: 10.0.5 (base 10.0.0)
KLCP type: mega

MPC renderer: EVR CP
MPC subs: 1
MPC decoder: H264=0 VC1=0 MPEG2=1

##### Decoder Settings #####

LAV Video (x86):
H264=1|0 VC1=1|0 MPEG2=1|0 MPEG4=1|0 FLV1=1 WMV3=0

LAV Audio (x86):
MP3=1 AAC=1 Vorbis=1 AC3=1 DTS=1 LPCM=1 WMA=0

LAV Video (x64):
H264=1|0 VC1=1|0 MPEG2=1|0 MPEG4=1|0 FLV1=1 WMV3=0

LAV Audio (x64):
MP3=1 AAC=1 Vorbis=1 AC3=1 DTS=1 LPCM=1 WMA=0

ffdshow (x86):
H264=0 VC1=0 MPEG2=0 XVID=0 DX50=0 DIV3=0 FLV1=0 RAW=0
MP3=7 AAC=1 Vorbis=1 AC3=1 DTS=17 LPCM=4 RAW=0

ffdshow (x64):
H264=0 VC1=0 MPEG2=0 XVID=0 DX50=0 DIV3=0 FLV1=0 RAW=0
MP3=7 AAC=1 Vorbis=1 AC3=1 DTS=17 LPCM=4 RAW=0


##### DirectShow Filters (32-bit) #####

Description: CyberLink Audio Decoder (HP)
File name: c:\program files (x86)\hewlett-packard\media\dvd\kernel\movie\claud.ax
CLSID: {01E52E20-FB77-4F3D-B74A-3D7990C2A34E}
Merit: 00201000

Description: ffdshow Video Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\ffdshow\ffdshow.ax
CLSID: {04FE9017-F873-410E-871E-AB91661A4EF7}
Merit: FF800001

Description: MSDVD Audio Wizard (HP)
File name: c:\program files (x86)\hewlett-packard\media\dvd\kernel\movie\claudwizard.ax
CLSID: {06AA3FCB-BC9A-4694-BC20-7533E1207312}
Merit: 00200001

Description: ffdshow Audio Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\ffdshow\ffdshow.ax
CLSID: {0F40E1E5-4F79-4988-B1A9-CC98794E6B55}
Merit: FF800001

Description: DV Muxer
File name: C:\Windows\SysWOW64\qdv.dll
CLSID: {129D7E40-C10D-11D0-AFB9-00AA00B67A42}
Merit: 00400000 = MERIT_UNLIKELY

Description: Color Space Converter
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {1643E180-90F5-11CE-97D5-00AA0055595A}
Merit: 00400001 = MERIT_UNLIKELY + 1

Description: LAV Splitter
File name: c:\program files (x86)\k-lite codec pack\filters\lav\lavsplitter.ax
CLSID: {171252A0-8820-4AFE-9DF8-5C92B2D66B04}
Merit: 00400001 = MERIT_UNLIKELY + 1

Description: WM ASF Reader
File name: C:\Windows\SysWOW64\qasf.dll
CLSID: {187463A0-5BB7-11D3-ACBE-0080C75E246E}
Merit: 00400000 = MERIT_UNLIKELY

Description: CyberLink Audio Wizard
File name: c:\program files (x86)\cyberlink\powerdvd10\audiofilter\claudwizard.ax
CLSID: {1986FDCF-F657-4866-A83C-998B943A6321}
Merit: 00201010

Description: AVI Splitter
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {1B544C20-FD0B-11CE-8C63-00AA0044B51E}
Merit: 00600000 = MERIT_NORMAL

Description: VGA 16 Color Ditherer
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {1DA08500-9EDC-11CF-BC10-00AA00AC74F6}
Merit: 00400000 = MERIT_UNLIKELY

Description: Microsoft MPEG-2 Video Decoder
File name: c:\windows\syswow64\msmpeg2vdec.dll
CLSID: {212690FB-83E5-4526-8FD7-74478B7939CD}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: AC3 Parser Filter
File name: c:\windows\syswow64\mpg2splt.ax
CLSID: {280A3020-86CF-11D1-ABE6-00A0C905F375}
Merit: 00600000 = MERIT_NORMAL

Description: MJPEG Decompressor
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {301056D0-6DFF-11D2-9EEB-006008039E37}
Merit: 00600000 = MERIT_NORMAL

Description: Indeo® video 5.10 Decompression Filter
File name: c:\windows\syswow64\ir50_32.dll
CLSID: {30355649-0000-0010-8000-00AA00389B71}
Merit: 00640000

Description: MPEG-I Stream Splitter
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {336475D0-942A-11CE-A870-00AA002FEAB5}
Merit: 00600000 = MERIT_NORMAL

Description: SAMI (CC) Parser
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {33FACFE0-A9BE-11D0-A520-00A0D10129C0}
Merit: 00400000 = MERIT_UNLIKELY

Description: VBI Codec
File name: c:\windows\syswow64\vbicodec.ax
CLSID: {370A1D5D-DDEB-418C-81CD-189E0D4FA443}
Merit: 00600000 = MERIT_NORMAL

Description: CyberLink RealMedia Splitter(PDVD10)
File name: c:\program files (x86)\cyberlink\powerdvd10\navfilter\clrmsplitter.ax
CLSID: {38A6AC0C-4B7C-4922-8ADC-D22C55B86666}
Merit: 00600000 = MERIT_NORMAL

Description: MPEG-2 Splitter
File name: c:\windows\syswow64\mpg2splt.ax
CLSID: {3AE86B20-7BE8-11D1-ABE6-00A0C905F375}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: Internal Script Command Renderer
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {48025243-2D39-11CE-875D-00608CB78066}
Merit: 00800001 = MERIT_PREFERRED + 1

Description: MPEG Audio Decoder
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {4A2286E0-7BEF-11CE-9BD9-0000E202599C}
Merit: 03680001

Description: DV Splitter
File name: C:\Windows\SysWOW64\qdv.dll
CLSID: {4EB31670-9FC6-11CF-AF6E-00AA00B67A42}
Merit: 00600000 = MERIT_NORMAL

Description: CyberLink Audio Decoder (PDVD10)
File name: c:\program files (x86)\cyberlink\powerdvd10\audiofilter\claud.ax
CLSID: {501099E1-5C05-4ED3-B0CB-371F97F5412C}
Merit: 00201000

Description: Haali Media Splitter
File name: c:\program files (x86)\k-lite codec pack\filters\haali\splitter.ax
CLSID: {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D}
Merit: 00800001 = MERIT_PREFERRED + 1

Description: Haali Media Splitter (AR)
File name: c:\program files (x86)\k-lite codec pack\filters\haali\splitter.ax
CLSID: {564FD788-86C9-4444-971E-CC4A243DA150}
Merit: 00400000 = MERIT_UNLIKELY

Description: DENNY's DTS/AC3Filter
File name: c:\program files (x86)\dtsfilter\dtsfilter.ax
CLSID: {5721C7ED-89C3-4100-B081-71EB874A7626}
Merit: 00600001 = MERIT_NORMAL + 1

Description: ACM Wrapper
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {6A08CF80-0E18-11CF-A24D-0020AFD79767}
Merit: 00600000 = MERIT_NORMAL

Description: Video Renderer
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {6BC1CFFA-8FC1-4261-AC22-CFB4CC38DB50}
Merit: 00800001 = MERIT_PREFERRED + 1

Description: Line 21 Decoder
File name: C:\Windows\SysWOW64\qdvd.dll
CLSID: {6E8D4A20-310C-11D0-B79A-00AA003767A7}
Merit: 00600000 = MERIT_NORMAL

Description: Video Port Manager
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {6F26A6CD-967B-47FD-874A-7AED2C9D25A2}
Merit: 00600000 = MERIT_NORMAL

Description: Video Renderer
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {70E102B0-5556-11CE-97C0-00AA0055595A}
Merit: 00400000 = MERIT_UNLIKELY

Description: CyberLink AVCHD Navigator
File name: c:\program files (x86)\cyberlink\powerdvd10\navfilter\clavchdnav.ax
CLSID: {7970C827-3AF9-42D2-BF7D-8217E2AA87DB}
Merit: 00600000 = MERIT_NORMAL

Description: WM ASF Writer
File name: C:\Windows\SysWOW64\qasf.dll
CLSID: {7C23220E-55BB-11D3-8B16-00C04FB6BD3D}
Merit: 00400000 = MERIT_UNLIKELY

Description: VBI Surface Allocator
File name: c:\windows\syswow64\vbisurf.ax
CLSID: {814B9800-1C88-11D1-BAD9-00609744111A}
Merit: 00600000 = MERIT_NORMAL

Description: DirectVobSub (auto-loading version)
File name: c:\program files (x86)\k-lite codec pack\filters\vsfilter.dll
CLSID: {9852A670-F845-491B-9BE6-EBD841B8A613}
Merit: 00800002 = MERIT_PREFERRED + 2

Description: AC3Filter
File name: c:\program files (x86)\k-lite codec pack\filters\ac3filter\ac3filter.ax
CLSID: {A753A1EC-973E-4718-AF8E-A3F554D45C44}
Merit: 40000000

Description: AVI Draw
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {A888DF60-1E90-11CF-AC98-00AA004C0FA9}
Merit: 00600064

Description: CyberLink HAM Decoder
File name: c:\program files (x86)\cyberlink\powerdvd10\videofilter\clcvd.ax
CLSID: {A93F76CF-4B73-4B67-89ED-7E0AF90BBFED}
Merit: 00600000 = MERIT_NORMAL

Description: DC-Bass Source
File name: c:\program files (x86)\k-lite codec pack\filters\dcbass\dcbasssourcemod.ax
CLSID: {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492}
Merit: 00400000 = MERIT_UNLIKELY

Description: WST Pager
File name: c:\windows\syswow64\wstpager.ax
CLSID: {AD6C8934-F31B-4F43-B5E4-0541C1452F6F}
Merit: 00800000 = MERIT_PREFERRED

Description: MPEG-2 Demultiplexer
File name: c:\windows\syswow64\mpg2splt.ax
CLSID: {AFB6C280-2C41-11D3-8A60-0000F81E0E4A}
Merit: 00600000 = MERIT_NORMAL

Description: DV Video Decoder
File name: C:\Windows\SysWOW64\qdv.dll
CLSID: {B1B77C00-C3E4-11CF-AF79-00AA00B67A42}
Merit: 00800000 = MERIT_PREFERRED

Description: LAV Splitter Source
File name: c:\program files (x86)\k-lite codec pack\filters\lav\lavsplitter.ax
CLSID: {B98D13E7-55DB-4385-A33D-09FD1BA26338}
Merit: 00400001 = MERIT_UNLIKELY + 1

Description: VP7 Decompressor
File name: c:\program files (x86)\k-lite codec pack\filters\vp7dec.ax
CLSID: {C204438D-6E1A-4309-B09C-0C0F749863AF}
Merit: 00800000 = MERIT_PREFERRED

Description: CyberLink RealVideo Decoder(PDVD10)
File name: c:\program files (x86)\cyberlink\powerdvd10\videofilter\clrmvd.ax
CLSID: {C548BB6C-0E62-4A25-AE4E-DE41856BC682}
Merit: 00600000 = MERIT_NORMAL

Description: MPEG-2 Sections and Tables
File name: c:\windows\syswow64\mpeg2data.ax
CLSID: {C666E115-BB62-4027-A113-82D643FE2D99}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: IVF source filter
File name: c:\windows\syswow64\ivfsrc.ax
CLSID: {C69E8F40-D5C8-11D0-A520-145405C10000}
Merit: 00600000 = MERIT_NORMAL

Description: AVI Decompressor
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {CF49D4E0-1115-11CE-B03A-0020AF0BA770}
Merit: 00600000 = MERIT_NORMAL

Description: AVI/WAV File Source
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {D3588AB0-0781-11CE-B03A-0020AF0BA770}
Merit: 00400000 = MERIT_UNLIKELY

Description: Wave Parser
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {D51BD5A1-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: MIDI Parser
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {D51BD5A2-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: Multi-file Parser
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {D51BD5A3-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: File stream renderer
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {D51BD5A5-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: CyberLink MPEG-4 Splitter (PDVD10)
File name: c:\program files (x86)\cyberlink\powerdvd10\navfilter\clm4splt.ax
CLSID: {DB17C0D7-EA02-4CC0-94A3-C8E07B1510F9}
Merit: 00600000 = MERIT_NORMAL

Description: CyberLink RealAudio Decoder(PDVD10)
File name: c:\program files (x86)\cyberlink\powerdvd10\audiofilter\clrmaud.ax
CLSID: {DB5D8193-CB8D-4C72-98A5-1C147E075EDF}
Merit: 00600000 = MERIT_NORMAL

Description: Microsoft MPEG-1/DD Audio Decoder
File name: c:\windows\syswow64\msmpeg2adec.dll
CLSID: {E1F1A0B8-BEEE-490D-BA7C-066C40B5E2B9}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: Line 21 Decoder 2
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {E4206432-01A1-4BEE-B3E1-3702C8EDC574}
Merit: 00600002 = MERIT_NORMAL + 2

Description: File Source (Async.)
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {E436EBB5-524F-11CE-9F53-0020AF0BA770}
Merit: 00400000 = MERIT_UNLIKELY

Description: File Source (URL)
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {E436EBB6-524F-11CE-9F53-0020AF0BA770}
Merit: 00400000 = MERIT_UNLIKELY

Description: LAV Audio Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\lav\lavaudio.ax
CLSID: {E8E73B6B-4CB3-44A4-BE99-4F7BCB96E491}
Merit: 00800003 = MERIT_PREFERRED + 3

Description: CyberLink FLV Splitter(PDVD10)
File name: c:\program files (x86)\cyberlink\powerdvd10\navfilter\clflvsplitter.ax
CLSID: {ECA099DE-D413-4500-B401-6C4FF1EB9580}
Merit: 00400000 = MERIT_UNLIKELY

Description: LAV Video Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\lav\lavvideo.ax
CLSID: {EE30215D-164F-4A92-A4EB-9D4C13390F9F}
Merit: 00800003 = MERIT_PREFERRED + 3

Description: MPEG Video Decoder
File name: C:\Windows\SysWOW64\quartz.dll
CLSID: {FEB50740-7BEF-11CE-9BD9-0000E202599C}
Merit: 40000001

(A total of 198 filters, 64 shown, 134 hidden)


##### DirectShow Filters (64-bit) #####

Description: ffdshow Video Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\ffdshow64\ffdshow.ax
CLSID: {04FE9017-F873-410E-871E-AB91661A4EF7}
Merit: FF800001

Description: ffdshow Audio Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\ffdshow64\ffdshow.ax
CLSID: {0F40E1E5-4F79-4988-B1A9-CC98794E6B55}
Merit: FF800001

Description: DV Muxer
File name: C:\Windows\system32\qdv.dll
CLSID: {129D7E40-C10D-11D0-AFB9-00AA00B67A42}
Merit: 00400000 = MERIT_UNLIKELY

Description: Color Space Converter
File name: C:\Windows\system32\quartz.dll
CLSID: {1643E180-90F5-11CE-97D5-00AA0055595A}
Merit: 00400001 = MERIT_UNLIKELY + 1

Description: LAV Splitter
File name: c:\program files (x86)\k-lite codec pack\filters\lav64\lavsplitter.ax
CLSID: {171252A0-8820-4AFE-9DF8-5C92B2D66B04}
Merit: 00400001 = MERIT_UNLIKELY + 1

Description: WM ASF Reader
File name: C:\Windows\system32\qasf.dll
CLSID: {187463A0-5BB7-11D3-ACBE-0080C75E246E}
Merit: 00400000 = MERIT_UNLIKELY

Description: AVI Splitter
File name: C:\Windows\system32\quartz.dll
CLSID: {1B544C20-FD0B-11CE-8C63-00AA0044B51E}
Merit: 00600000 = MERIT_NORMAL

Description: VGA 16 Color Ditherer
File name: C:\Windows\system32\quartz.dll
CLSID: {1DA08500-9EDC-11CF-BC10-00AA00AC74F6}
Merit: 00400000 = MERIT_UNLIKELY

Description: Microsoft MPEG-2 Video Decoder
File name: c:\windows\system32\msmpeg2vdec.dll
CLSID: {212690FB-83E5-4526-8FD7-74478B7939CD}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: AC3 Parser Filter
File name: c:\windows\system32\mpg2splt.ax
CLSID: {280A3020-86CF-11D1-ABE6-00A0C905F375}
Merit: 00600000 = MERIT_NORMAL

Description: Microsoft TV Caption Decoder
File name: c:\windows\ehome\mstvcapn.dll
CLSID: {2F7EE4B6-6FF5-4EB4-B24A-2BFC41117171}
Merit: 00200001

Description: MJPEG Decompressor
File name: C:\Windows\system32\quartz.dll
CLSID: {301056D0-6DFF-11D2-9EEB-006008039E37}
Merit: 00600000 = MERIT_NORMAL

Description: MPEG-I Stream Splitter
File name: C:\Windows\system32\quartz.dll
CLSID: {336475D0-942A-11CE-A870-00AA002FEAB5}
Merit: 00600000 = MERIT_NORMAL

Description: SAMI (CC) Parser
File name: C:\Windows\system32\quartz.dll
CLSID: {33FACFE0-A9BE-11D0-A520-00A0D10129C0}
Merit: 00400000 = MERIT_UNLIKELY

Description: VBI Codec
File name: c:\windows\system32\vbicodec.ax
CLSID: {370A1D5D-DDEB-418C-81CD-189E0D4FA443}
Merit: 00600000 = MERIT_NORMAL

Description: MPEG-2 Splitter
File name: c:\windows\system32\mpg2splt.ax
CLSID: {3AE86B20-7BE8-11D1-ABE6-00A0C905F375}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: Internal Script Command Renderer
File name: C:\Windows\system32\quartz.dll
CLSID: {48025243-2D39-11CE-875D-00608CB78066}
Merit: 00800001 = MERIT_PREFERRED + 1

Description: MPEG Audio Decoder
File name: C:\Windows\system32\quartz.dll
CLSID: {4A2286E0-7BEF-11CE-9BD9-0000E202599C}
Merit: 03680001

Description: DV Splitter
File name: C:\Windows\system32\qdv.dll
CLSID: {4EB31670-9FC6-11CF-AF6E-00AA00B67A42}
Merit: 00600000 = MERIT_NORMAL

Description: Haali Media Splitter
File name: c:\program files (x86)\k-lite codec pack\filters\haali\splitter.x64.ax
CLSID: {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D}
Merit: 00800001 = MERIT_PREFERRED + 1

Description: Haali Media Splitter (AR)
File name: c:\program files (x86)\k-lite codec pack\filters\haali\splitter.x64.ax
CLSID: {564FD788-86C9-4444-971E-CC4A243DA150}
Merit: 00400000 = MERIT_UNLIKELY

Description: ACM Wrapper
File name: C:\Windows\system32\quartz.dll
CLSID: {6A08CF80-0E18-11CF-A24D-0020AFD79767}
Merit: 00600000 = MERIT_NORMAL

Description: Video Renderer
File name: C:\Windows\system32\quartz.dll
CLSID: {6BC1CFFA-8FC1-4261-AC22-CFB4CC38DB50}
Merit: 00800001 = MERIT_PREFERRED + 1

Description: Line 21 Decoder
File name: <unknown>
CLSID: {6E8D4A20-310C-11D0-B79A-00AA003767A7}
Merit: 00600000 = MERIT_NORMAL

Description: Video Port Manager
File name: C:\Windows\system32\quartz.dll
CLSID: {6F26A6CD-967B-47FD-874A-7AED2C9D25A2}
Merit: 00600000 = MERIT_NORMAL

Description: Video Renderer
File name: C:\Windows\system32\quartz.dll
CLSID: {70E102B0-5556-11CE-97C0-00AA0055595A}
Merit: 00400000 = MERIT_UNLIKELY

Description: WM ASF Writer
File name: C:\Windows\system32\qasf.dll
CLSID: {7C23220E-55BB-11D3-8B16-00C04FB6BD3D}
Merit: 00400000 = MERIT_UNLIKELY

Description: VBI Surface Allocator
File name: c:\windows\system32\vbisurf.ax
CLSID: {814B9800-1C88-11D1-BAD9-00609744111A}
Merit: 00600000 = MERIT_NORMAL

Description: DirectVobSub (auto-loading version)
File name: c:\program files (x86)\k-lite codec pack\filters\vsfilter64.dll
CLSID: {9852A670-F845-491B-9BE6-EBD841B8A613}
Merit: 00800002 = MERIT_PREFERRED + 2

Description: AC3Filter
File name: c:\program files (x86)\k-lite codec pack\filters\ac3filter64\ac3filter64.ax
CLSID: {A753A1EC-973E-4718-AF8E-A3F554D45C44}
Merit: 40000000

Description: WST Pager
File name: c:\windows\system32\wstpager.ax
CLSID: {AD6C8934-F31B-4F43-B5E4-0541C1452F6F}
Merit: 00800000 = MERIT_PREFERRED

Description: MPEG-2 Demultiplexer
File name: c:\windows\system32\mpg2splt.ax
CLSID: {AFB6C280-2C41-11D3-8A60-0000F81E0E4A}
Merit: 00600000 = MERIT_NORMAL

Description: DV Video Decoder
File name: C:\Windows\system32\qdv.dll
CLSID: {B1B77C00-C3E4-11CF-AF79-00AA00B67A42}
Merit: 00800000 = MERIT_PREFERRED

Description: LAV Splitter Source
File name: c:\program files (x86)\k-lite codec pack\filters\lav64\lavsplitter.ax
CLSID: {B98D13E7-55DB-4385-A33D-09FD1BA26338}
Merit: 00400001 = MERIT_UNLIKELY + 1

Description: MPEG-2 Sections and Tables
File name: c:\windows\system32\mpeg2data.ax
CLSID: {C666E115-BB62-4027-A113-82D643FE2D99}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: AVI Decompressor
File name: C:\Windows\system32\quartz.dll
CLSID: {CF49D4E0-1115-11CE-B03A-0020AF0BA770}
Merit: 00600000 = MERIT_NORMAL

Description: AVI/WAV File Source
File name: C:\Windows\system32\quartz.dll
CLSID: {D3588AB0-0781-11CE-B03A-0020AF0BA770}
Merit: 00400000 = MERIT_UNLIKELY

Description: Wave Parser
File name: C:\Windows\system32\quartz.dll
CLSID: {D51BD5A1-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: MIDI Parser
File name: C:\Windows\system32\quartz.dll
CLSID: {D51BD5A2-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: Multi-file Parser
File name: C:\Windows\system32\quartz.dll
CLSID: {D51BD5A3-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: File stream renderer
File name: C:\Windows\system32\quartz.dll
CLSID: {D51BD5A5-7548-11CF-A520-0080C77EF58A}
Merit: 00400000 = MERIT_UNLIKELY

Description: Microsoft MPEG-1/DD Audio Decoder
File name: c:\windows\system32\msmpeg2adec.dll
CLSID: {E1F1A0B8-BEEE-490D-BA7C-066C40B5E2B9}
Merit: 005FFFFF = MERIT_NORMAL - 1

Description: Line 21 Decoder 2
File name: C:\Windows\system32\quartz.dll
CLSID: {E4206432-01A1-4BEE-B3E1-3702C8EDC574}
Merit: 00600002 = MERIT_NORMAL + 2

Description: File Source (Async.)
File name: C:\Windows\system32\quartz.dll
CLSID: {E436EBB5-524F-11CE-9F53-0020AF0BA770}
Merit: 00400000 = MERIT_UNLIKELY

Description: File Source (URL)
File name: C:\Windows\system32\quartz.dll
CLSID: {E436EBB6-524F-11CE-9F53-0020AF0BA770}
Merit: 00400000 = MERIT_UNLIKELY

Description: LAV Audio Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\lav64\lavaudio.ax
CLSID: {E8E73B6B-4CB3-44A4-BE99-4F7BCB96E491}
Merit: 00800003 = MERIT_PREFERRED + 3

Description: LAV Video Decoder
File name: c:\program files (x86)\k-lite codec pack\filters\lav64\lavvideo.ax
CLSID: {EE30215D-164F-4A92-A4EB-9D4C13390F9F}
Merit: 00800003 = MERIT_PREFERRED + 3

Description: MPEG Video Decoder
File name: C:\Windows\system32\quartz.dll
CLSID: {FEB50740-7BEF-11CE-9BD9-0000E202599C}
Merit: 40000001

(A total of 111 filters, 48 shown, 63 hidden)


##### ICM Class Manager (32-bit) #####

Description: ffdshow video encoder
File name: c:\program files (x86)\k-lite codec pack\filters\ffdshow\ffdshow.ax
CLSID: {4DB2B5D9-4556-4340-B189-AD20110D953F} (ffdshow video encoder)
Merit: 00100000 = MERIT_SW_COMPRESSOR

Description: Indeo® video 5.10 Compression Filter
File name: c:\windows\syswow64\ir50_32.dll
CLSID: {1F73E9B1-8C3A-11D0-A3BE-00A0C9244436} (Indeo® video 5.10 Compression Filter)
Merit: 00100000 = MERIT_SW_COMPRESSOR

(A total of 4 filters, 2 shown, 2 hidden)


##### ICM Class Manager (64-bit) #####

Description: ffdshow video encoder
File name: c:\program files (x86)\k-lite codec pack\filters\ffdshow64\ffdshow.ax
CLSID: {4DB2B5D9-4556-4340-B189-AD20110D953F} (ffdshow video encoder)
Merit: 00100000 = MERIT_SW_COMPRESSOR

(A total of 3 filters, 1 shown, 2 hidden)


##### Default source filters (32-bit) #####

.3g2 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.3gp {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.3gp2 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.3gpp {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.aac {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.alac {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.amr {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ape {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.avs {D3588AB0-0781-11CE-B03A-0020AF0BA770} AVI/WAV File Source
.bdmv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.bmp {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.cmp {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.dib {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.dv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.dvr-ms {C9F5FE02-F851-4eb5-99EE-AD602AF1E619} StreamBufferSource
.evo {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.f4v {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.flac {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.flv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.gif {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.hdmov {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.jfif {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.jpe {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.jpeg {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.jpg {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.m2t {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.m2ts {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.m3u {e436ebb5-524f-11ce-9f53-0020af0ba770} File Source (Async.)
.m4a {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.m4v {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mka {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D} Haali Media Splitter
.mks {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D} Haali Media Splitter
.mkv {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D} Haali Media Splitter
.mov {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mp3 {E436EBB5-524F-11CE-9F53-0020AF0BA770} File Source (Async.)
.mp4 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mp4v {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mpc {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mpls {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mpv4 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mts {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ofr {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492} DC-Bass Source
.ofs {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492} DC-Bass Source
.oga {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ogg {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ogm {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ogv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.pcd {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.pcx {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.png {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.psd {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.ra {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.rm {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.rmvb {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.tak {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492} DC-Bass Source
.tga {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.tif {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.tp {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ts {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.webm {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.wmf {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter
.wtv {C9F5FE02-F851-4eb5-99EE-AD602AF1E619} StreamBufferSource
.wv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source

##### Default source filters (64-bit) #####

.3g2 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.3gp {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.3gp2 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.3gpp {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.aac {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.alac {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.amr {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ape {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.avs {D3588AB0-0781-11CE-B03A-0020AF0BA770} AVI/WAV File Source
.bdmv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.bmp {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.cmp {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.dib {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.dv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.dvr-ms {C9F5FE02-F851-4eb5-99EE-AD602AF1E619} StreamBufferSource
.evo {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.f4v {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.flac {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.flv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.gif {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.hdmov {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.jfif {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.jpe {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.jpeg {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.jpg {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.m2t {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.m2ts {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.m3u {e436ebb5-524f-11ce-9f53-0020af0ba770} File Source (Async.)
.m4a {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.m4v {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mka {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D} Haali Media Splitter
.mks {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D} Haali Media Splitter
.mkv {55DA30FC-F16B-49FC-BAA5-AE59FC65F82D} Haali Media Splitter
.mov {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mp3 {E436EBB5-524F-11CE-9F53-0020AF0BA770} File Source (Async.)
.mp4 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mp4v {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mpc {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mpls {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mpv4 {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.mts {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ofr {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492} DC-Bass Source [only valid for 32-bit]
.ofs {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492} DC-Bass Source [only valid for 32-bit]
.oga {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ogg {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ogm {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ogv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.pcd {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.pcx {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.png {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.psd {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.ra {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.rm {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.rmvb {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.tak {ABE7B1D9-4B3E-4ACD-A0D1-92611D3A4492} DC-Bass Source [only valid for 32-bit]
.tga {7DF62B50-6843-11D2-9EEB-006008039E37} Generate Still Video
.tif {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.tp {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.ts {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.webm {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source
.wmf {61665621-5523-11D4-A717-80E5A24FE52B} CyberLink Load Image Filter [only valid for 32-bit]
.wtv {C9F5FE02-F851-4eb5-99EE-AD602AF1E619} StreamBufferSource
.wv {B98D13E7-55DB-4385-A33D-09FD1BA26338} LAV Splitter Source

##### ACM and VFW Codecs (32-bit) #####

Description: <none>
ID: vidc.mrle
File name: C:\Windows\SysWOW64\msrle32.dll

Description: <none>
ID: vidc.msvc
File name: C:\Windows\SysWOW64\msvidc32.dll

Description: <none>
ID: msacm.imaadpcm
File name: C:\Windows\SysWOW64\imaadp32.acm

Description: <none>
ID: msacm.msg711
File name: C:\Windows\SysWOW64\msg711.acm

Description: <none>
ID: msacm.msgsm610
File name: C:\Windows\SysWOW64\msgsm32.acm

Description: <none>
ID: msacm.msadpcm
File name: C:\Windows\SysWOW64\msadp32.acm

Description: <none>
ID: vidc.uyvy
File name: C:\Windows\SysWOW64\msyuv.dll

Description: <none>
ID: vidc.yuy2
File name: C:\Windows\SysWOW64\msyuv.dll

Description: <none>
ID: vidc.yvyu
File name: C:\Windows\SysWOW64\msyuv.dll

Description: <none>
ID: vidc.iyuv
File name: C:\Windows\SysWOW64\iyuv_32.dll

Description: <none>
ID: vidc.i420
File name: C:\Windows\SysWOW64\i420vfw.dll

Description: <none>
ID: vidc.yvu9
File name: C:\Windows\SysWOW64\tsbyuv.dll

Description: <none>
ID: msacm.l3acm
File name: C:\Windows\SysWOW64\l3codeca.acm

Description: <none>
ID: vidc.cvid
File name: C:\Windows\SysWOW64\iccvid.dll

Description:
ID: msacm.l3codecp
File name: C:\Windows\SysWOW64\l3codecp.acm

Description: Indeo 3 video codec
ID: VIDC.IV31
File name: C:\Windows\SysWOW64\ir32_32.dll

Description: Indeo 3 video codec
ID: VIDC.IV32
File name: C:\Windows\SysWOW64\ir32_32.dll

Description: Indeo 4 video codec
ID: VIDC.IV41
File name: C:\Windows\SysWOW64\ir41_32.ax

Description: Indeo® video 5.10
ID: VIDC.IV50
File name: C:\Windows\SysWOW64\ir50_32.dll

Description: <none>
ID: vidc.I263
File name: C:\Windows\SysWOW64\i263_32.drv

Description: Lagarith lossless video codec
ID: VIDC.LAGS
File name: C:\Windows\SysWOW64\lagarith.dll

Description: x264 H.264 video codec
ID: VIDC.X264
File name: C:\Windows\SysWOW64\x264vfw.dll

Description: Xvid MPEG-4 video codec 1.3.2
ID: VIDC.XVID
File name: C:\Windows\SysWOW64\xvidvfw.dll

Description: ffdshow video codec
ID: VIDC.FFDS
File name: C:\Windows\SysWOW64\ff_vfw.dll

Description: AC3 ACM codec
ID: msacm.ac3acm
File name: C:\Windows\SysWOW64\ac3acm.acm

Description: <none>
ID: VIDC.YV12
File name: C:\Windows\SysWOW64\yv12vfw.dll

(A total of 26 codecs, 26 shown, 0 hidden)


##### ACM and VFW Codecs (64-bit) #####

Description: <none>
ID: vidc.mrle
File name: C:\Windows\system32\msrle32.dll

Description: <none>
ID: vidc.msvc
File name: C:\Windows\system32\msvidc32.dll

Description: <none>
ID: msacm.imaadpcm
File name: C:\Windows\system32\imaadp32.acm

Description: <none>
ID: msacm.msg711
File name: C:\Windows\system32\msg711.acm

Description: <none>
ID: msacm.msgsm610
File name: C:\Windows\system32\msgsm32.acm

Description: <none>
ID: msacm.msadpcm
File name: C:\Windows\system32\msadp32.acm

Description: <none>
ID: VIDC.UYVY
File name: C:\Windows\system32\msyuv.dll

Description: <none>
ID: VIDC.YUY2
File name: C:\Windows\system32\msyuv.dll

Description: <none>
ID: VIDC.YVYU
File name: C:\Windows\system32\msyuv.dll

Description: <none>
ID: VIDC.IYUV
File name: C:\Windows\system32\iyuv_32.dll

Description: <none>
ID: vidc.i420
File name: C:\Windows\system32\iyuv_32.dll

Description: <none>
ID: VIDC.YVU9
File name: C:\Windows\system32\tsbyuv.dll

Description: <none>
ID: msacm.l3acm
File name: C:\Windows\system32\l3codeca.acm

Description: Fraunhofer IIS MPEG Layer-3 Codec (Professional)
ID: msacm.l3codecp
File name: C:\Windows\system32\l3codecp.acm

Description: Lagarith lossless video codec
ID: VIDC.LAGS
File name: C:\Windows\system32\lagarith.dll

Description: x264 H.264 video codec
ID: VIDC.X264
File name: C:\Windows\system32\x264vfw64.dll

Description: Xvid MPEG-4 video codec 1.3.2
ID: VIDC.XVID
File name: C:\Windows\system32\xvidvfw.dll

Description: ffdshow video codec
ID: VIDC.FFDS
File name: C:\Windows\system32\ff_vfw.dll

Description: AC3 ACM codec
ID: msacm.ac3acm
File name: C:\Windows\system32\ac3acm.acm

(A total of 19 codecs, 19 shown, 0 hidden)

Codec Tweak Tool > Preferred Splitters > select LAV for WMV
Then seeking should be faster.

Thank you for the suggestion. It also seems to help to use MPC's internal VC1 filter. Seeking is still not up to SMPlayer's speed for these VC1 files, but is acceptable, given that MPC's playback quality is better.

Is there a way to increase the cache for MPC? SMPlayer has a setting for this, and its cache is enabled by default; I suspect it might be part of the reason why it can seek through these files so quickly.

Edit: actually, playing around with settings just now, it seems using "Use Merit" as the wmv splitter and MPC's internal VC1 filter seems to be the best combination for the largest, highest bitrate VC1 files. Very noticeable speed bump in seeking with these settings.

VLC seeks faster because it does not seek to keyframes, but any random frame. Downside of that method is that the video may show some corruption for a few frames after a seek. SMPlayer might do the same.

The internal decoder is MPC-HC is the same as LAV Video decoder. That decoder should be already used by default after installing the pack. You can see which filters are being used by looking at Play>Filters in the menu of MPC-HC.
"Use merit" should result in LAV Splitter being used.

Thank you for the further information. When I select "Use Merit" for wmv with the Codec Tweak Tool, "WMVideo Decoder DMO" shows up under Play > Filters in MPC, when I play a VC1 file. After trying the different preferred splitters for wmv's, I am now fairly certain that this WMVideo Decoder does a better job at handling VC1 files than the LAV Splitter.

I also turned off "Fast Seek (on keyframe)" in MPC under Options > Tweaks, based on your insight about how VLC seeks.

This seems to be the best setup I can get out of MPC and the Codec Pack for VC1 files. I do wonder how SMPlayer blazes through these things so quickly. MPC offers the same performance for large, high-bitrate H264 files, but gets hung up somehow on these VC1's.

Thank you again for your responses and suggestions.

"WMVideo Decoder DMO" is a decoder, not a splitter. The name of the standard WMV splitter is "WM ASF Reader".

The slow seeking is to blame on the WMV container. It does not have a good index table for seeking like other formats have.

Thanks for the clarification between splitters and decoders. I played around further with settings, and I've been able to reproduce, more or less, SMPlayer's seek times for VC1 files in MPC.

In the Codec Tweak Tool > Configuration > DirectShow Filters > LAV Video Decoder > Formats, I unchecked vc1 and wmv3. In MPC Options > Internal Filters, I disabled VC1. I kept "Use Merit" as the preferred splitter for wmv files, which as you point out, forces MPC to use the WM ASF Reader to split wmv files into streams.

With LAV no longer trying to split or decode VC1 files, the seeking delays I was experiencing seem to have been removed (even though, by default, under the LAV Formats tab, "use Microsoft WMV9 DMO decoder for WMV3 and VC-1" is checked by default).