[mythtv-commits] Ticket #5552: AC3 passthrough causes accelerated playback on OSX frontend

[MythTV]

#5552: AC3 passthrough causes accelerated playback on OSX frontend
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 Reporter:  scram69@…          |          Owner:  jyavenard
     Type:  defect             |         Status:  infoneeded
 Priority:  minor              |      Milestone:  0.25
Component:  Ports - OSX        |        Version:  Trunk Head
 Severity:  medium             |     Resolution:
 Keywords:                     |  Ticket locked:  0
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Comment (by scram69@…):

 Replying to [comment:33 jyavenard]:
 > You do everything the same but for the plex instructions.
 >
 > In the MIDI utility, right click on the "aggregate device" and select
 "Use this device for sound output"
 > Do no change anything in the System Preferes -> Sound. If you do, it
 will stop using the aggregate device automatically.
 >
 > In mythtv, you simply select CoreAudio:Default
 >
 > Oh, and make sure the mythtv build you are using is less than a week old
 ; some fixes went in.

 Trying the "aggregate device" with Speaker Configuration -> 5.1 results in
 no sound.  I see the following in the frontend log:
 2011-03-06 20:30:12.851 AO: Original codec was AC3, signed 16 bit, 48 kHz,
 6 channels

 2011-03-06 20:30:12.854 AO: enc(1), passthru(0), canAC3(1), canDTS(1),
 canLPCM(0), configured_channels(6), 6 channels supported(1)

 2011-03-06 20:30:12.854 AO: Reencoding decoded AC-3/DTS to AC-3

 2011-03-06 20:30:12.854 AO: Creating AC-3 Encoder with sr = 48000, ch = 6

 2011-03-06 20:30:12.855 DEnc: Init codecid=AC3, br=448000, sr=48000, ch=6

 2011-03-06 20:30:12.855 [ac3 @ 0x8a45a640]No channel layout specified. The
 encoder will guess the layout, but it might be incorrect.

 2011-03-06 20:30:12.855 DigitalEncoder::Init fs=1536, bpf=12 ofb=18432

 2011-03-06 20:30:12.855 AO: Audio processing enabled

 2011-03-06 20:30:12.855 AO: Opening audio device 'CoreAudio:' ch 2(6) sr
 48000 sf signed 16 bit reenc 1

 2011-03-06 20:30:12.856 AudioOutputCA Error: Configured for AC3 passthru
 but can't find an AC3 output stream. Disabling audio to prevent static

 2011-03-06 20:30:12.856 AudioOutput Error: Aborting reconfigure

 2011-03-06 20:30:12.856 AudioPlayer: Disabling Audio, reason is: Aborting
 reconfigure

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Ticket URL: <http://code.mythtv.org/trac/ticket/5552#comment:34>
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