Opened 11 years ago

Closed 10 years ago

Last modified 10 years ago

#6699 closed defect (fixed)

8 Channel audio tracks play only white noise

Reported by: robert.mcnamara@… Owned by: JYA
Priority: minor Milestone: 0.23
Component: MythTV - Audio Output Version: head
Severity: medium Keywords:
Cc: Ticket locked: no

Description (last modified by robertm)

After the ffmpeg resync in [20797], TrueHD and LPCM 8 channel audio tracks cause loud, persistent white noise. This affects all primary audio tracks in HD-DVD material and many primary audio tracks from Blu ray material.

After switching to the TrueHD track, the audio becomes loud white noise, and the video framerate is halved.

30 second Sample available at:

I can provide additional samples of varying lengths on request. Thanks!

Change History (8)

comment:1 Changed 11 years ago by robertm

Description: modified (diff)
Summary: TrueHD Tracks in EVOB containers do not play properly8 Channel audio tracks play only white noise

comment:2 Changed 10 years ago by Janne Grunau

Owner: changed from Isaac Richards to Janne Grunau
Status: newaccepted

comment:3 Changed 10 years ago by Janne Grunau

(In [22109]) set sample format to S16 for the TrueHD decoder

MythTV cannot handle S32 at the moment. Makes the audio in Refs #6699 recognizeable but there still an annoying repetitive distortion.

comment:4 Changed 10 years ago by stuartm

Component: MythTV - Video PlaybackMythTV - Audio Output
Owner: changed from Janne Grunau to JYA
Status: acceptedassigned

comment:5 Changed 10 years ago by JYA

Status: assignedinfoneeded

Can you confirm that the issue still occurs with trunk >= 22432.

Normally, the Audio should now be re-encoded as AC3...

comment:6 Changed 10 years ago by robertm

Resolution: fixed
Status: infoneededclosed

Yep, all seems to mostly work now-- there are some secondary issues related to decode/transcode of the original audio track but they may be an upstream issue so I'll narrow those further. Appears fixed by r22432.

comment:7 Changed 10 years ago by stuartm

Milestone: unknown0.23

comment:8 Changed 10 years ago by JYA

Final note.. I hope to have 7 and 8 channels supports added for 0.23

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