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MediaPortal 1
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6 Chl Analog Sound - Live TV only stereo - Known dshow bug ?
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<blockquote data-quote="bigj" data-source="post: 42854" data-attributes="member: 10940"><p>Hi folks,</p><p></p><p>For a long time I've been using stereo out from my Audigy2 card into a dolby pro logic receiver. I took the time recently to remove the receiver and output 6 discrete analog channels to my amp. So now I can get glorious 6 channel (3/2+SW) surround sound from DVDs.</p><p></p><p>For regular music/tv, I'm using ffdshow - I have it set to auto select a configuration for "Music" or "TV" based on the filters in the graph; music is output as standard 2 channel stereo whereas TV goes via ffdshow's SW dolby decoder to multiple channels. This just works, and is completely transparent which is great. I've disabled the DD and DTS codecs in ffdshow and instead use AC3Filter for this as it seems a touch more stable (I noticed ffdshow's codecs would sometimes drop ac3 stream output if there was change from say 2.1 to 5.1 when moving from DVD menu to main program).</p><p></p><p>Anyway, I have one remaining problem that is driving me nuts.</p><p>When watching live TV I lose sound from all but L and R - I can see ffdshow is loaded and has selected the correct config - I can see looking at the volume filter that it is outputing on all channels. I just don't get to hear it. I can record the program and play it back and all works just fine, with no apparent difference in the graph used! It is related purely to the live.tv stream.</p><p></p><p>I did some googling and found this; it appears to be exactly this problem:</p><p><a href="http://groups.google.co.uk/group/microsoft.public.windows.mediacenter/browse_thread/thread/77ecd5586d2edc1f/c8b18f7e08d39e03?lnk=st&q=ffdshow+dolby+decoder&rnum=6#c8b18f7e08d39e03" target="_blank">http://groups.google.co.uk/group/microsoft.public.windows.mediacenter/browse_thread/thread/77ecd5586d2edc1f/c8b18f7e08d39e03?lnk=st&q=ffdshow+dolby+decoder&rnum=6#c8b18f7e08d39e03</a></p><p></p><p>I tried the nVideo reg patch mentioned in this thread - but it didn't work; it appears to be specific for MCE so I guess no surprise. I had been using the 'dual tuner' patch, so backed this out - and the problem still remains.</p><p></p><p>Does *everyone* get this? Does *anyone* else get it?</p><p>Any known solutions?</p><p></p><p>Cheers,</p><p>BigJ.</p></blockquote><p></p>
[QUOTE="bigj, post: 42854, member: 10940"] Hi folks, For a long time I've been using stereo out from my Audigy2 card into a dolby pro logic receiver. I took the time recently to remove the receiver and output 6 discrete analog channels to my amp. So now I can get glorious 6 channel (3/2+SW) surround sound from DVDs. For regular music/tv, I'm using ffdshow - I have it set to auto select a configuration for "Music" or "TV" based on the filters in the graph; music is output as standard 2 channel stereo whereas TV goes via ffdshow's SW dolby decoder to multiple channels. This just works, and is completely transparent which is great. I've disabled the DD and DTS codecs in ffdshow and instead use AC3Filter for this as it seems a touch more stable (I noticed ffdshow's codecs would sometimes drop ac3 stream output if there was change from say 2.1 to 5.1 when moving from DVD menu to main program). Anyway, I have one remaining problem that is driving me nuts. When watching live TV I lose sound from all but L and R - I can see ffdshow is loaded and has selected the correct config - I can see looking at the volume filter that it is outputing on all channels. I just don't get to hear it. I can record the program and play it back and all works just fine, with no apparent difference in the graph used! It is related purely to the live.tv stream. I did some googling and found this; it appears to be exactly this problem: [url]http://groups.google.co.uk/group/microsoft.public.windows.mediacenter/browse_thread/thread/77ecd5586d2edc1f/c8b18f7e08d39e03?lnk=st&q=ffdshow+dolby+decoder&rnum=6#c8b18f7e08d39e03[/url] I tried the nVideo reg patch mentioned in this thread - but it didn't work; it appears to be specific for MCE so I guess no surprise. I had been using the 'dual tuner' patch, so backed this out - and the problem still remains. Does *everyone* get this? Does *anyone* else get it? Any known solutions? Cheers, BigJ. [/QUOTE]
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