[mythtv-users] AC3 passthrough setup problems

James Fidell james at fidell.co.uk
Thu Nov 8 19:30:06 UTC 2007

I have everything working fine with normal stereo sound, so I thought
I'd finally get around to trying to get AC3 passthrough working on my
main front-end.

I'm following the guidelines in the wiki at



but when testing with mplayer (using an ISO rip of a DVD) mplayer
spews a52 CRC errors, plays choppy sound and can't display the video
properly either.

I've tried changing the mythtv config as suggested and playing the same
iso back with the internal player but get no sound at all.  In "normal"
stereo mode, playback is fine on both video and audio.

I think first I need to confirm that I can play back properly through
the SPDIF connector outside mythtv.  Is there another easy way to do


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