[mythtv-users] MythTV Raspberry Pi2 frontend testers

[rob e]

On Thu, 2015-12-31 at 17:36 +1100, rob e wrote:
>/firstly, thanks Lawrence for all your hard work ... it's really coming />/along nicely, I managed to install Myth 27 on the latest Raspbian-Jessie />/(installed via noobs) />//>/On trying the build, I found that the UI worked well and most files />/played. It even played quite well from an X session />//>/I also found that - />/- The only "passthrough" to HDMI that would work was Stereo, and neither />/DTS nor AC3 would pass through. />/I tried OpenMax and Alsa. OpenMax wouldn't play at all and Alsa would />/play as simple Stereo but not 5.1 and not DTS or AC3 />/OpenMax and Alsa would play test sounds as 5.1 and/or DTS/AC3 ... but />/it was highly distorted and no sound playing content />/My receiver can process both DTS and AC3 (but not HD variants) />/successfully eg. from Myth on a PC, Chromebox, Nuc, and from Kodi on a Pi />/- FLV files would not play (probably just need some codecs) />/- Building of video lists in Video section is really really slow, not />/sure what's happening there />//>/Is there any useful debug / further information I could supply ?/

/firstly, thanks Lawrence for all your hard work ... it's really coming 
along nicely, I managed to install Myth 27 on the latest Raspbian-Jessie 
(installed via noobs)//////On trying the build, I found that the UI worked well and most files 
played. It even played quite well from an X session//////I also found that -////- The only "passthrough" to HDMI that would work was Stereo, and neither 
DTS nor AC3 would pass through.////I tried OpenMax and Alsa. OpenMax wouldn't play at all and Alsa would 
play as simple Stereo but not 5.1 and not DTS or AC3////OpenMax and Alsa would play test sounds as 5.1 and/or DTS/AC3 ... but it 
was highly distorted and no sound playing content////My receiver can process both DTS and AC3 (but not HD variants) 
successfully eg. from Myth on a PC, Chromebox, Nuc, and from Kodi on a Pi////- FLV files would not play (probably just need some codecs)////- Building of video lists in Video section is really really slow, not 
sure what's happening there//////Is there any useful debug / further information I could supply ? /

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On Thu, 2016-01-01 at 04:25:54, Deacon Patrick Ouellette  wrote:

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/After a little research, there seems to be a known issue with ALSA and 
digital pass through on the Raspberry Pi. You add a configuration file 
to the ALSA directory and a couple of other settings and it will work. 
Info can be found at //https://github.com/raspberrypi/linux/issues/997//Pat/

hi Pat,
I should mention that there are fewer problems playing these files via Alsa

With sound set to Alsa
- If set to Stereo, no ac3 no dts
     Sound plays on all content (dts, ac3 etc) ... but obviously not passed through as ac3 or dts
- If set to Stereo, with ac3 with dts
     Sound ok on sd / stereo
     Distorted sound on ac3 ("interrupted")
     Distorted sound on dts ("white noise")
- Not possible to set speakers = 5.1 unless ac3 / dts selected
- If set to 5.1 with ac3 with dts
     Sound ok on sd / stereo
     Distorted sound on ac3 ("interrupted")
     Distorted sound on dts ("white noise")


I have tried the config file you suggested, it didn't solve these problems

At the moment I would use Alsa for sound because it offers greater reliability for the moment, at the expense of higher quality streams ie. only stereo sound is supported

It would be nice to be able to use OpenMax ...

ADDITIONAL INFORMATION
======================
Music will not play ... neither Flac not MP3 files will play .... via Alsa nor OpenMax. Something about frequency (44khz vs 48khz) ??

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