Thanks Yaobing :-)
Well that worked in so much as I can now chose Gabest Matroska, which is great...
but it's still taking forever to open AND!
MC is playing the audio file from completely the wrong media file!!!
It's actually playing the Audio stream from the previous file in playing now!
For some reason the filters seem to have gone a bit crazy:
Filter Graph Info:
Filter 'ReClock Audio Renderer'
CLSID: {9DC15360-914C-46B8-B9DF-BFE67FD36C6A}
Host: c:\program files (x86)\reclock\reclock.ax
Input Pin 'In'
Connected to pin 'Out' of filter 'AC3Filter 0070'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'Default DirectSound Device'
CLSID: {79376820-07D0-11CF-A24D-0020AFD79767}
Host: quartz.dll
Input Pin 'Audio Input pin (rendered)'
Connected to pin 'Out' of filter 'AC3Filter'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'Video Mixing Renderer 9'
CLSID: {51B4ABF3-748F-4E3B-A276-C828330E926A}
Host: quartz.dll
Input Pin 'VMR Input0'
Connected to pin 'Output' of filter 'CoreAVC Video Decoder'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Input Pin 'VMR Input1'
Filter 'AC3Filter'
CLSID: {A753A1EC-973E-4718-AF8E-A3F554D45C44}
Host: c:\program files (x86)\ac3filter\ac3filter.ax
Input Pin 'In'
Connected to pin 'Output' of filter 'JRiver Media Proxy Audio'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00002000-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Output Pin 'Out'
Connected to pin 'Audio Input pin (rendered)' of filter 'Default DirectSound Device'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'AC3Filter 0070'
CLSID: {A753A1EC-973E-4718-AF8E-A3F554D45C44}
Host: c:\program files (x86)\ac3filter\ac3filter.ax
Input Pin 'In'
Connected to pin 'Out' of filter 'ffdshow Audio Decoder'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Output Pin 'Out'
Connected to pin 'In' of filter 'ReClock Audio Renderer'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'CoreAVC Video Decoder'
CLSID: {09571A4B-F1FE-4C60-9760-DE6D310C7C31}
Host: c:\program files (x86)\corecodec\coreavc professional edition\coreavcdecoder.ax
Input Pin 'Input'
Connected to pin 'Output' of filter 'JRiver Media Proxy Video'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {31435641-0000-0010-8000-00AA00389B71}, Format type FORMAT_MPEG2_VIDEO
Output Pin 'Output'
Connected to pin 'VMR Input0' of filter 'Video Mixing Renderer 9'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Filter 'JRiver Media Proxy Audio'
CLSID: {A4207487-E7D8-406B-9882-B66370DE2492}
Host:
Input Pin 'Input'
Connected to pin 'English, AC3 5.1 384 Kbps (Audio 1)' of filter 'Matroska Splitter'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00002000-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Output Pin 'Output'
Connected to pin 'In' of filter 'AC3Filter'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00002000-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Filter 'JRiver Media Proxy Video'
CLSID: {A4207487-E7D8-406B-9882-B66370DE2492}
Host:
Input Pin 'Input'
Connected to pin 'English, 720p BDRip -UNiT3D (Video 1)' of filter 'Matroska Splitter'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {31435641-0000-0010-8000-00AA00389B71}, Format type FORMAT_MPEG2_VIDEO
Output Pin 'Output'
Connected to pin 'Input' of filter 'CoreAVC Video Decoder'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {31435641-0000-0010-8000-00AA00389B71}, Format type FORMAT_MPEG2_VIDEO
Filter 'ffdshow Audio Decoder'
CLSID: {0F40E1E5-4F79-4988-B1A9-CC98794E6B55}
Host: c:\program files (x86)\combined community codec pack\filters\ffdshow\ffdshow.ax
Output Pin 'Out'
Connected to pin 'In' of filter 'AC3Filter 0070'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Input Pin 'In'
Connected to pin 'English, Director's Commentary - 2.0 Vorbis @ 80 Kbps (Audio 2)' of filter 'Matroska Splitter'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {8D2FD10B-5841-4A6B-8905-588FEC1ADED9}, Format type Unknown GUID Name: {8D2FD10B-5841-4A6B-8905-588FEC1ADED9}
Filter 'Matroska Splitter'
CLSID: {149D2E01-C32E-4939-80F6-C07B81015A7A}
Host: c:\program files (x86)\opensource avi splitter\matroskasplitter.ax
Output Pin 'English, 720p BDRip -UNiT3D (Video 1)'
Connected to pin 'Input' of filter 'JRiver Media Proxy Video'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {31435641-0000-0010-8000-00AA00389B71}, Format type FORMAT_MPEG2_VIDEO
Output Pin 'English, AC3 5.1 384 Kbps (Audio 1)'
Connected to pin 'Input' of filter 'JRiver Media Proxy Audio'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00002000-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Output Pin 'English, Director's Commentary - 2.0 Vorbis @ 80 Kbps (Audio 2)'
Connected to pin 'In' of filter 'ffdshow Audio Decoder'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {8D2FD10B-5841-4A6B-8905-588FEC1ADED9}, Format type Unknown GUID Name: {8D2FD10B-5841-4A6B-8905-588FEC1ADED9}
Output Pin 'English, Subs (Subtitle 1)'
Input Pin 'Input'
Connected to pin 'Output' of filter 'K:\Media\Video\To be sorted\Pixar Short Movies\13 - Lifted.2007.720p.BluRay.AC3.x264\13 - Lifted.2007.720p.BluRay.AC3.x264.mkv'
Major type MEDIATYPE_Stream Sub type Unknown GUID Name: {1AC0BEBD-4D2B-45AD-BCEB-F2C41C5E3788}, Format type TIME_FORMAT_NONE
Filter 'K:\Media\Video\To be sorted\Pixar Short Movies\13 - Lifted.2007.720p.BluRay.AC3.x264\13 - Lifted.2007.720p.BluRay.AC3.x264.mkv'
CLSID: {E436EBB5-524F-11CE-9F53-0020AF0BA770}
Host: quartz.dll
Output Pin 'Output'
Connected to pin 'Input' of filter 'Matroska Splitter'
Major type MEDIATYPE_Stream Sub type Unknown GUID Name: {1AC0BEBD-4D2B-45AD-BCEB-F2C41C5E3788}, Format type TIME_FORMAT_NONE
For reference I've not got Reclock selected, nor two AC3 Filters....