Opened 12 years ago

Closed 12 years ago

#5384 closed defect (duplicate)

AC3 passthrough does not function when Max Audio Channels set to '5.1', only when set to 'Stereo'

Reported by: kidcharlemagne87@… Owned by: Isaac Richards
Priority: minor Milestone: unknown
Component: mythtv Version: 0.21
Severity: medium Keywords: ac3 5.1 passthrough max audio channels
Cc: Ticket locked: no

Description

I have set up the audio to passthrough ac3 encoded sound (5.1 channels) to my external digital audio receiver. Ironically, in the Setup->General->Audio screen in the Frontend, if I choose '5.1' for 'Max Audio Channels' the passthrough does not work, and only silence is heard on my speakers. If I set it instead to 'Stereo', I get proper passthrough and full 5.1 channel sound on the speakers.

Change History (4)

comment:1 Changed 12 years ago by anonymous

I can confirm that this happens to me as well, running the latest 21-fixes SVN.

comment:2 Changed 12 years ago by anonymous

This happens to me too. Here is what I see from a log on the frontend.

2008-06-08 14:27:00.714 AFD: Opened codec 0x867c930, id(MPEG2VIDEO) type(Video) 2008-06-08 14:27:00.714 AFD: codec AC3 has 6 channels 2008-06-08 14:27:00.715 AFD: Opened codec 0x964cb40, id(AC3) type(Audio) 2008-06-08 14:27:01.246 AFD: Opened codec 0x964cb40, id(MPEG2VIDEO) type(Video) 2008-06-08 14:27:01.246 AFD: codec AC3 has 6 channels

I think this is the relevant part. I see no errors anywhere.

aplay -L default:CARD=CK804

NVidia CK804, NVidia CK804 Default Audio Device

front:CARD=CK804,DEV=0

NVidia CK804, NVidia CK804 Front speakers

surround40:CARD=CK804,DEV=0

NVidia CK804, NVidia CK804 4.0 Surround output to Front and Rear speakers

surround41:CARD=CK804,DEV=0

NVidia CK804, NVidia CK804 4.1 Surround output to Front, Rear and Subwoofer speakers

surround50:CARD=CK804,DEV=0

NVidia CK804, NVidia CK804 5.0 Surround output to Front, Center and Rear speakers

surround51:CARD=CK804,DEV=0

NVidia CK804, NVidia CK804 5.1 Surround output to Front, Center, Rear and Subwoofer speakers

null

Discard all samples (playback) or generate zero samples (capture)

comment:3 Changed 12 years ago by foobum@…

#5900 will fix

comment:4 Changed 12 years ago by Dibblah

Resolution: duplicate
Status: newclosed
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