when i tried opening an mkv video i had using media player classic, this error occured:
“The following pins failed to find a connectable filter:
Media Type 0:
--------------------------
Video: MPEG4 Video (H264) 704x400 23.98fps
AM_MEDIA_TYPE:
majortype: MEDIATYPE_Video {73646976-0000-0010-8000-00AA00389B71}
subtype: Unknown GUID Name {31435641-0000-0010-8000-00AA00389B71}
formattype: FORMAT_MPEG2_VIDEO {E06D80E3-DB46-11CF-B4D1-00805F6CBBEA}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 1
cbFormat: 165
VIDEOINFOHEADER:
rcSource: (0,0)-(0,0)
rcTarget: (0,0)-(0,0)
dwBitRate: 0
dwBitErrorRate: 0
AvgTimePerFrame: 417083
VIDEOINFOHEADER2:
dwInterlaceFlags: 0x00000000
dwCopyProtectFlags: 0x00000000
dwPictAspectRatioX: 704
dwPictAspectRatioY: 400
dwControlFlags: 0x00000000
dwReserved2: 0x00000000
MPEG2VIDEOINFO:
dwStartTimeCode: 0
cbSequenceHeader: 33
dwProfile: 0x00000064
dwLevel: 0x00000033
dwFlags: 0x00000004
BITMAPINFOHEADER:
biSize: 40
biWidth: 704
biHeight: 400
biPlanes: 1
biBitCount: 24
biCompression: AVC1
biSizeImage: 0
biXPelsPerMeter: 0
biYPelsPerMeter: 0
biClrUsed: 0
biClrImportant: 0
pbFormat:
0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0020: 00 00 00 00 00 00 00 00 3b 5d 06 00 00 00 00 00 ........;]......
0030: 00 00 00 00 00 00 00 00 c0 02 00 00 90 01 00 00 ........À......
0040: 00 00 00 00 00 00 00 00 28 00 00 00 c0 02 00 00 ........(...À...
0050: 90 01 00 00 01 00 18 00 41 56 43 31 00 00 00 00 .......AVC1....
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0070: 00 00 00 00 21 00 00 00 64 00 00 00 33 00 00 00 ....!...d...3...
0080: 04 00 00 00|00 19 67 64 00 33 ac 34 e3 80 b0 33 ......gd.3¬4ã°3
0090: a1 00 08 00 00 03 01 df 85 1e 8f 18 31 8e 80 00 ¡......ß..1.
00a0: 04 68 ee bc b0 .hî¼°
"
I have absolutely no idea wat to do about this.... Any information can be a great help to me... thanx 
I don’t think there’s any standalone codec you can download for H.264 ATM. Most come bundled in codec packs or all-in-one players like Videolan.
I personally recommend ffdshow-tryout: http://ffdshow-tryout.sourceforge.net
During installation just uncheck everything except H.264 in the video section. The file should play fine in Media Player Classic after that.
If you’re willing to try new things, try Videolan. It’s non-invasive and won’t hijack file associations unless you tell it to. It uninstalls very cleanly also. http://www.videolan.org/vlc