Opened 6 years ago
Closed 6 years ago
Last modified 6 years ago
#13249 closed Bug Report - General (fixed)
OpenMax:hdmi on Raspberry Pi - LFE and centre channels swapped
Reported by: | Owned by: | Peter Bennett | |
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Priority: | minor | Milestone: | 29.2 |
Component: | Ports - rPi | Version: | 0.28.1 |
Severity: | medium | Keywords: | |
Cc: | Ticket locked: | no |
Description
Using OpenMax:hdmi audio output on a Raspberry Pi 3, with speakers set to 5.1, the centre and LFE channels are swapped. This error is present on both the speaker test screen, and during playback of 5.1 content.
Installed from the mythtv-light package, version 0.28.1-59-g7c931f1752-0on
Change History (18)
comment:1 Changed 6 years ago by
Component: | MythTV - Audio Output → Ports - rPi |
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Owner: | changed from JYA to Peter Bennett |
Status: | new → assigned |
comment:2 Changed 6 years ago by
comment:3 Changed 6 years ago by
I do not have a sound system capable of multi-channel PCM. I can make a fix but I cannot test it. If I supply a package please let me know if you will be able to test it for me.
Please let me know if you are running Jessie or Stretch version of Raspbian and whether you need MythTV version 28, 29 or 30 for the test package.
comment:4 Changed 6 years ago by
Thanks very much for looking at this. I can test Stretch with MythTV 0.28.
comment:5 Changed 6 years ago by
As it happens, I have a 7.1 system; I notice that the 7.1 channel test works even less than the 5.1 does - I'd be happy to help with any tests of this too (although for my own use I don't especially need 7.1 sound since I don't think UK TV broadcasts in 7.1).
comment:6 Changed 6 years ago by
Please download the updated package from here
https://www.dropbox.com/s/rwcj6oaswbz7fj0/mythtv-light_0.28.2-dirty-0_armhf_stretch.deb?dl=0
Install it using
sudo gdebi <filename>
. If you do not have gdebi on your raspberry pi, install it with sudo apt install gdebi-core
.
Let me know if this solves the 5.1 problem. If there is a 7.1 problem still, let me know the details.
To get back to your prior install of MythTV if necessary, first uninstall mythtv-light and then install again with apt.
comment:7 Changed 6 years ago by
Thanks for the quick turnaround. However, this seems to have made no difference. In "information centre", MythTV reports version "fixes/0.28 (v0.28.2-dirty)", but the sound output is unchanged.
Specifically, with 5.1, centre and LFE channels are swapped, but other channels are correct.
With 7.1 (both with my original and this version), only front left and front right output sound at all, and other channels are silent.
comment:8 Changed 6 years ago by
Update - I've just tried a 7.1 file with OMX player (using --layout 7.1), and it also only plays front-left and front-right, so I don't think this is a Myth issue particularly.
However, a 5.1 file, using --layout 5.1, with OMX player, does work.
comment:10 Changed 6 years ago by
Please try this package.
https://www.dropbox.com/s/pxo9plziqdys0wm/mythtv-light_0.28.2-dirty-2_armhf_stretch.deb?dl=0
comment:11 Changed 6 years ago by
Some definite improvement: with this version, 5.1 sounds all play from the correct speakers, but ONLY if I have "use internal mixer" selected. If I leave "internal mixer" turned off, the receiver still lights up to indicate that audio streams are incoming, but no sound is heard. I'm not sure if this is just user error - is there some way to adjust the OMX volume, that I am not aware of?
In 7.1 mode, I see the same "internal mixer" issue, plus I only get sound from front-left and front-right in speaker test, as before.
comment:12 Changed 6 years ago by
For some reason the volume frequently sets itself back to zero. Did you try pressing the keyboard square bracket ] while playing to set the volume up? This seems to work during playback but not during audio test.
You will also have to select the setting to allow internal volume control.
comment:13 Changed 6 years ago by
Sorry, yes, I said "internal mixer" before but I meant "Use internal volume controls". If this setting is enabled, 5.1 sound is working correctly, thank you. With it disabled, I get silence.
comment:14 Changed 6 years ago by
Resolution: | → fixed |
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Status: | assigned → closed |
comment:17 Changed 6 years ago by
Milestone: | needs_triage → 29.2 |
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comment:18 Changed 6 years ago by
Owner: | changed from Peter Bennett to Peter Bennett |
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See https://forum.mythtv.org/viewtopic.php?f=46&t=2554