Mailing List Archive: MythTV: Users

Strange Audio Problem 0.25

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jraymyth at gmail

Jun 12, 2012, 10:40 AM

Post #1 of 15 (988 views)
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Strange Audio Problem 0.25

I have a fresh install of Ubuntu 12.04 and MythBuntu 0.25 FE/BE. The
install went without a hitch. The tuners and channels are all
configured. Blah blah blah. The problem I am having is with the
audio.

I went through the Setup Wizard and set the audio device
(ALSA:hdmi:CARD=NVidia,DEV=1). The speaker test hissed as expected.
Video Playback Profile is set to VDPAU High Quality. Test High
Definition plays me a nice movie intro of someone walking across icy
mountains. The incidental music is clear and audible.

So I went to make a recording and played it. The video was clear, but
no audio was emitted. The recording does have sound when played
through VLC. I figure that its a config problem, but of what? ALSA
is clearly working with the HDMI port. MythTV is communicating with
ALSA, in the setup at the least. I don't mind digging in...but where
do I dig?

Thanks,
jr

Intel DQ67EP (i5) -- Onboard audio is disabled in the bios
MSI N210-MD512H GeForce 210 512MB
4GB

mythuser [at] Jotu:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC888 Analog [ALC888 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC888 Digital [ALC888 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
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jyavenard at gmail

Jun 12, 2012, 1:23 PM

Post #2 of 15 (980 views)
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Re: Strange Audio Problem 0.25 [In reply to]

On 13 June 2012 03:40, jr <jraymyth [at] gmail> wrote:

> So I went to make a recording and played it. The video was clear, but
> no audio was emitted. The recording does have sound when played
> through VLC. I figure that its a config problem, but of what? ALSA
> is clearly working with the HDMI port. MythTV is communicating with
> ALSA, in the setup at the least. I don't mind digging in...but where
> do I dig?

mythfrontend -v audio,playback

start playback of the file giving you an issue, post the output of the console
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jraymyth at gmail

Jun 12, 2012, 5:01 PM

Post #3 of 15 (968 views)
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Re: Strange Audio Problem 0.25 [In reply to]

On Tue, Jun 12, 2012 at 4:23 PM, Jean-Yves Avenard <jyavenard [at] gmail> wrote:
> On 13 June 2012 03:40, jr <jraymyth [at] gmail> wrote:
>
>> So I went to make a recording and played it. The video was clear, but
>> no audio was emitted. The recording does have sound when played
>> through VLC. I figure that its a config problem, but of what? ALSA
>> is clearly working with the HDMI port. MythTV is communicating with
>> ALSA, in the setup at the least. I don't mind digging in...but where
>> do I dig?
>
> mythfrontend -v audio,playback
>
> start playback of the file giving you an issue, post the output of the console
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users

****From start of play to end of play***

2012-06-12 19:58:10.846712 I TV: Creating TV object
2012-06-12 19:58:10.850216 I TV: Finished creating TV object
2012-06-12 19:58:10.850225 I TV: StartTV() -- begin
2012-06-12 19:58:10.850289 N Resuming idle timer
2012-06-12 19:58:10.850308 N Suspending idle timer
2012-06-12 19:58:10.850315 I TV: Init -- begin
2012-06-12 19:58:10.851858 I TV: Created TvPlayWindow.
2012-06-12 19:58:10.851924 I TV: DrawUnusedRects() -- begin
2012-06-12 19:58:10.851932 I TV: DrawUnusedRects() -- end
2012-06-12 19:58:10.853835 I TV: Init -- end
2012-06-12 19:58:10.854256 I TV: tv->Playback() -- begin
2012-06-12 19:58:10.856518 I TV: HandleStateChange(0) -- begin
2012-06-12 19:58:10.856531 I TV: Attempting to change from None to
WatchingPreRecorded
2012-06-12 19:58:10.856831 I
FileRingBuf(/var/lib/mythtv/recordings/1081_20120612111100.mpg):
OpenFile(/var/lib/mythtv/recordings/1081_20120612111100.mpg, 2000 ms)
2012-06-12 19:58:10.857012 I TV: StartPlayer(0, WatchingPreRecorded,
main) -- begin
2012-06-12 19:58:10.857024 I TV: Elapsed time since TV constructor
was called: 11 ms
2012-06-12 19:58:10.931924 I Pulse: PulseAudio not running
2012-06-12 19:58:10.933170 I ALSA: OpenDevice hdmi:CARD=NVidia,DEV=1
2012-06-12 19:58:10.941666 I AOS: Sample rate 32000 is supported
2012-06-12 19:58:10.941681 I AOS: Sample rate 44100 is supported
2012-06-12 19:58:10.941689 I AOS: Sample rate 48000 is supported
2012-06-12 19:58:10.941697 I AOS: Format signed 16 bit is supported
2012-06-12 19:58:10.941703 I AOS: Format signed 24 bit MSB is supported
2012-06-12 19:58:10.941708 I AOS: Format signed 32 bit is supported
2012-06-12 19:58:10.941716 I AOS: 2 channel(s) are supported
2012-06-12 19:58:10.941836 I ALSA: Successfully retrieved ELD data
2012-06-12 19:58:10.941849 I ELDUTILS: Detected monitor VW246 at
connection type HDMI
2012-06-12 19:58:10.941856 I ELDUTILS: available speakers: FL/FR
2012-06-12 19:58:10.941862 I ELDUTILS: max LPCM channels = 2
2012-06-12 19:58:10.941867 I ELDUTILS: max channels = 2
2012-06-12 19:58:10.941872 I ELDUTILS: supported codecs = LPCM
2012-06-12 19:58:10.941892 I ELDUTILS: supports coding type LPCM:
channels = 2, rates = 32000 44100 48000, bits = 16 20 24
2012-06-12 19:58:10.968411 I AOS: may be AC3 or DTS capable
2012-06-12 19:58:10.968422 I AOS: 6 channel(s) are supported
2012-06-12 19:58:10.968445 N AudioPlayer: Enabling Audio
2012-06-12 19:58:10.969275 I AFD: Buffer size: 32768, streamed 0
2012-06-12 19:58:10.989637 I AFD: Stream #0, has id 0x245 codec id
MPEG2VIDEO, type Video, bitrate 15498400 at 0x53a5c40
2012-06-12 19:58:10.990629 I VDP: Accepting: cmp(> 0 0) dec(vdpau)
cpus(1) skiploop(disabled) rend(vdpau) osd(vdpau) osdfade(enabled)
deint(vdpauadvanceddoublerate,vdpauadvanced) filt()
2012-06-12 19:58:10.990645 I VDP: LoadBestPreferences(2048x2048, 0)
2012-06-12 19:58:10.990667 I VDP: LoadBestPreferences(2048x2048, 60)
2012-06-12 19:58:10.990682 I VDP: LoadBestPreferences(1280x720, 60)
2012-06-12 19:58:10.990707 I AFD: Using 1 CPUs for decoding
2012-06-12 19:58:10.990716 I AFD: InitVideoCodec() 0x5011920
id(MPEG2VIDEO) type (Video).
2012-06-12 19:58:10.990752 I AFD: Selected FPS is 59.9401 (avg 59.96
codec 59.9401 container 90000 estimated 59.9401)
2012-06-12 19:58:10.990764 I Player(1): SetFrameInterval ps:1 scan:3
2012-06-12 19:58:10.990783 I Player(1): detectInterlace(Detect Scan,
Interlaced Scan, 59.9401, 720) ->Progressive Scan
2012-06-12 19:58:10.990805 I AFD: Using vdpau for video decoding
2012-06-12 19:58:10.990811 I AFD: Looking for decoder for MPEG2VIDEO
2012-06-12 19:58:10.990832 I AFD: Opened codec 0x5011920,
id(MPEG2VIDEO) type(Video)
2012-06-12 19:58:10.990845 I AFD: Stream #1, has id 0x246 codec id
AC3, type Audio, bitrate 448000 at 0x1bdf120
2012-06-12 19:58:10.990853 I AFD: codec AC3 has 2 channels
2012-06-12 19:58:10.990858 I AFD: Looking for decoder for AC3
2012-06-12 19:58:10.991222 I AFD: Opened codec 0x1b83460, id(AC3) type(Audio)
2012-06-12 19:58:10.991249 I AFD: Audio Track #1, with type 0 is A/V
stream #1 and has 2 channels in the English language(6647399).
2012-06-12 19:58:10.991261 I AFD: Stream #2, has id 0x247 codec id
AC3, type Audio, bitrate 192000 at 0x53a6130
2012-06-12 19:58:10.991268 I AFD: codec AC3 has 2 channels
2012-06-12 19:58:10.991272 I AFD: Looking for decoder for AC3
2012-06-12 19:58:10.991610 I AFD: Opened codec 0x466b7d0, id(AC3) type(Audio)
2012-06-12 19:58:10.991631 I AFD: Audio Track #2, with type 0 is A/V
stream #2 and has 2 channels in the Spanish; Castilian
language(7565409).
2012-06-12 19:58:10.991643 I AFD: Trying to select default track
2012-06-12 19:58:10.991648 I AFD: Trying to select audio track (w/lang)
2012-06-12 19:58:10.991668 I AFD: Selected track 1: English AC3 2ch
(A/V Stream #1)
2012-06-12 19:58:10.991677 I AFD: Initializing audio parms from audio track #1
2012-06-12 19:58:10.991698 I AFD: Audio format changed
from id(NONE) -1Hz -1ch -1bps (profile 0) to id( AC3)
48000Hz 2ch 16bps pt (profile 0)
2012-06-12 19:58:10.991712 I AO: Setting AC3 passthrough
2012-06-12 19:58:10.992518 I SPDIFEncoder: Creating spdif encoder (for AC3)
2012-06-12 19:58:10.992524 I AO: Killing AudioOutputDSP
2012-06-12 19:58:10.992535 I AO: Original codec was AC3, signed 16
bit, 48 kHz, 2 channels
2012-06-12 19:58:10.992551 I AO: enc(0), passthru(1), features
(AC3,DTS) configured_channels(2), 2 channels supported(1)
max_channels(2)
2012-06-12 19:58:10.992564 I AO: Opening audio device
'hdmi:CARD=NVidia,DEV=1' ch 2(2) sr 48000 sf signed 16 bit reenc 0
2012-06-12 19:58:10.992573 I ALSA: OpenDevice
hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
passthrough
2012-06-12 19:58:11.001427 I ALSA: SetParameters(format=2,
channels=2, rate=48000, buffer_time=500000, period_time=4)
2012-06-12 19:58:11.001473 I ALSA: Buffer size range from 64 to 16384
2012-06-12 19:58:11.001480 I ALSA: Period size range from 32 to 8192
2012-06-12 19:58:11.001496 I ALSA: Requested 500000us got 341333 buffer time
2012-06-12 19:58:11.001596 I ALSA: Hardware audio buffer cur: 64
need: 128 max allowed: 32768
2012-06-12 19:58:11.001618 E ALSA: Setting hardware audio buffer size to 128
2012-06-12 19:58:11.009507 E ALSA: Error opening
/proc/asound/card1/pcm7p/sub0/prealloc: Permission denied.
2012-06-12 19:58:11.009521 E ALSA: Try to manually increase audio
buffer with: echo 128 | sudo tee
/proc/asound/card1/pcm7p/sub0/prealloc
2012-06-12 19:58:11.009535 E ALSA: Unable to sufficiently increase
ALSA hardware buffer size - underruns are likely
2012-06-12 19:58:11.009543 I ALSA: OpenDevice
hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
passthrough
2012-06-12 19:58:11.017697 I ALSA: SetParameters(format=2,
channels=2, rate=48000, buffer_time=500000, period_time=4)
2012-06-12 19:58:11.017742 I ALSA: Buffer size range from 64 to 16384
2012-06-12 19:58:11.017749 I ALSA: Period size range from 32 to 8192
2012-06-12 19:58:11.017762 I ALSA: Buffer time = 341333 us
2012-06-12 19:58:11.017773 I ALSA: Period time = 4 periods
2012-06-12 19:58:11.113425 I ALSA: Buffer size = 16384 | Period size = 4096
2012-06-12 19:58:11.209466 I AO: Audio fragment size: 8192
2012-06-12 19:58:11.209488 I AO: Audio Stretch Factor: 1
2012-06-12 19:58:11.209539 I AO: Ending Reconfigure()
2012-06-12 19:58:11.209560 I Dec: Selected track #1 in the Unknown language(0)
2012-06-12 19:58:11.209573 I Dec: Resyncing position map.
posmapStarted = 0 livetv(0) watchingRec(0)
2012-06-12 19:58:11.209668 I AO: kickoffOutputAudioLoop: pid = 7589
2012-06-12 19:58:11.209690 I AO: OutputAudioLoop: Play Event
2012-06-12 19:58:11.210307 I Dec: Position map filled from DB to: 2352
2012-06-12 19:58:11.210325 I Dec: SyncPositionMap prerecorded, from
DB: 99 entries
2012-06-12 19:58:11.210334 I Dec: SyncPositionMap, new totframes:
2352, new length: 39, posMap size: 99
2012-06-12 19:58:11.452268 I AFD: Position map found
2012-06-12 19:58:11.452286 I AFD: Successfully opened decoder for
file: "/var/lib/mythtv/recordings/1081_20120612111100.mpg". novideo(0)
2012-06-12 19:58:11.455305 I VideoOutput: Allowed renderers: vdpau
2012-06-12 19:58:11.455323 I VideoOutput: Allowed renderers (filt:
vdpau): vdpau
2012-06-12 19:58:11.456082 I VDP: Accepting: cmp(> 0 0) dec(vdpau)
cpus(1) skiploop(disabled) rend(vdpau) osd(vdpau) osdfade(enabled)
deint(vdpauadvanceddoublerate,vdpauadvanced) filt()
2012-06-12 19:58:11.456097 I VDP: LoadBestPreferences(2048x2048, 0)
2012-06-12 19:58:11.456119 I VDP: LoadBestPreferences(2048x2048, 60)
2012-06-12 19:58:11.456134 I VDP: LoadBestPreferences(1280x720, 60)
2012-06-12 19:58:11.456148 I VideoOutput: Preferred renderer: vdpau
2012-06-12 19:58:11.456158 I VideoOutput: Trying video renderer: 'vdpau'
2012-06-12 19:58:11.457750 I VDP: Accepting: cmp(> 0 0) dec(vdpau)
cpus(1) skiploop(disabled) rend(vdpau) osd(vdpau) osdfade(enabled)
deint(vdpauadvanceddoublerate,vdpauadvanced) filt()
2012-06-12 19:58:11.457764 I VDP: LoadBestPreferences(2048x2048, 0)
2012-06-12 19:58:11.457783 I VDP: LoadBestPreferences(2048x2048, 60)
2012-06-12 19:58:11.457808 I VideoOutWindow::SetPIPState. pip_state: 0]
2012-06-12 19:58:11.457818 I VDP: LoadBestPreferences(2048x2048, 59.9401)
2012-06-12 19:58:11.457830 I Clearing OpenGL painter cache.
2012-06-12 19:58:11.465814 I Display Rect left: 0, top: 0, width:
1920, height: 1080, aspect: 1.33333
2012-06-12 19:58:11.465832 I Video Rect left: 0, top: 0, width:
1280, height: 720, aspect: 1.33333
2012-06-12 19:58:11.465843 I VDP: LoadBestPreferences(1280x720, 59.9401)
2012-06-12 19:58:11.465869 I Display Rect left: 0, top: 0, width:
1920, height: 1080, aspect: 1.33333
2012-06-12 19:58:11.465880 I Video Rect left: 0, top: 0, width:
1280, height: 720, aspect: 1.33333
2012-06-12 19:58:11.465886 I VDP: SetVideoRenderer(vdpau)
2012-06-12 19:58:11.465895 I VDP: SetVideoRender(vdpau) == GetVideoRenderer()
2012-06-12 19:58:11.466492 I VideoOutput: Pixel dimensions: Screen
1920x1080, window 1920x1080
2012-06-12 19:58:11.466507 I VideoOutput: Actual display dimensions:
530x301 mm Aspect: 1.7608
2012-06-12 19:58:11.466517 I VideoOutput: Estimated window
dimensions: 530x301 mm Aspect: 1.7608
2012-06-12 19:58:11.513756 I VDPAU: Created 2 output surfaces.
2012-06-12 19:58:11.513788 I VDPAU: Set colorkey to 0x20202
2012-06-12 19:58:11.513798 I VDPAU: Created VDPAU render device 1920x1080
2012-06-12 19:58:11.513811 I VidOutVDPAU: Created VDPAU osd (1920x1080)
2012-06-12 19:58:11.528376 I ColourSpace: PictureAttributes:
Brightness, Contrast, Colour, Hue, Studio Levels,
2012-06-12 19:58:11.528401 I Display Rect left: 240, top: 0, width:
1440, height: 1080, aspect: 1.77778
2012-06-12 19:58:11.528410 I Video Rect left: 0, top: 0, width:
1280, height: 720, aspect: 1.33333
2012-06-12 19:58:11.528414 I VidOutVDPAU: Created VDPAU context (GPU decode)
2012-06-12 19:58:11.528431 I Over/underscan. V: 0, H: 0
2012-06-12 19:58:11.528440 I Display Rect left: 240, top: 0, width:
1440, height: 1080, aspect: 1.77778
2012-06-12 19:58:11.528447 I Video Rect left: 0, top: 0, width:
1280, height: 720, aspect: 1.33333
2012-06-12 19:58:11.528455 N Player(1): Forcing decode extra audio
option on (Video method requires it).
2012-06-12 19:58:11.528464 I Player(1): LoadFilters(''..) -> 0x0
2012-06-12 19:58:11.529488 I Player(1): Decoder thread starting.
2012-06-12 19:58:11.533116 I OSD: Loaded window osd_message
2012-06-12 19:58:11.536427 I OSD: Loaded window osd_input
2012-06-12 19:58:11.544386 I OSD: Loaded window program_info
2012-06-12 19:58:11.548394 I OSD: Loaded window browse_info
2012-06-12 19:58:11.552160 I OSD: Loaded window osd_status
2012-06-12 19:58:11.555726 I OSD: Loaded window osd_program_editor
2012-06-12 19:58:11.560749 I OSD: Loaded window osd_debug
2012-06-12 19:58:11.560760 I OSD: Loaded OSD: size 1920x1080 offset 0+0
2012-06-12 19:58:11.560792 I OSD: Created window aa_OSD_SUBTITLES
2012-06-12 19:58:11.560810 I Player(1): ClearAfterSeek(0)
2012-06-12 19:58:11.561532 I VDP: GetFilteredDeint() : vdpau ->
'vdpauadvanceddoublerate'
2012-06-12 19:58:11.561779 I AO: OutputAudioLoop: Play Event
2012-06-12 19:58:11.561927 I VidOutVDPAU: Enabled deinterlacing.
2012-06-12 19:58:11.561948 I VSYNC: DRMVideoSync: Could not open
device /dev/dri/card0, No such file or directory
2012-06-12 19:58:11.561962 E VSYNC: RTCVideoSync: Could not open /dev/rtc:
eno: Permission denied (13)
2012-06-12 19:58:11.561968 E Player(1): Video sync method can't
support double framerate (refresh rate too low for 2x deint)
2012-06-12 19:58:11.562287 I VDP: GetFilteredDeint(vdpauadvanced) :
vdpau -> 'vdpauadvanced'
2012-06-12 19:58:11.562572 I VidOutVDPAU: Enabled deinterlacing.
2012-06-12 19:58:11.562991 I Player(1): Video timing method: USleep
with busy wait
2012-06-12 19:58:11.563003 I Player(1): Display Refresh Rate: 59.999
Video Frame Rate: 59.941
2012-06-12 19:58:11.563008 I Player(1): SetFrameInterval ps:1 scan:1
2012-06-12 19:58:11.563295 I playCtx: StartPlaying(): took 0 ms to
start player.
2012-06-12 19:58:11.563315 I TV: Created player.
2012-06-12 19:58:11.563332 I TV: StartPlayer(0, WatchingPreRecorded,
main) -- end ok
2012-06-12 19:58:11.565782 I TV: Changing from None to WatchingPreRecorded
2012-06-12 19:58:11.568586 I TV: DrawUnusedRects() -- begin
2012-06-12 19:58:11.568595 I TV: DrawUnusedRects() -- end
2012-06-12 19:58:11.568677 I TV: Main UI disabled.
2012-06-12 19:58:11.568685 I TV: HandleStateChange(0) -- end
2012-06-12 19:58:11.568689 I TV: tv->Playback() -- end
2012-06-12 19:58:11.568693 I TV: Entering main playback loop.
2012-06-12 19:58:11.571708 I Player(1): Waiting for video buffers...
2012-06-12 19:58:11.571736 I VidOutVDPAU: Created VDPAU decoder (2 ref frames)
2012-06-12 19:58:11.574525 I Player(1): Video Aspect ratio changed
from 1.33333 to 1.77778
2012-06-12 19:58:11.574543 I Display Rect left: 0, top: 0, width:
1920, height: 1080, aspect: 1.77778
2012-06-12 19:58:11.574551 I Video Rect left: 0, top: 0, width:
1280, height: 720, aspect: 1.77778
2012-06-12 19:58:11.574559 I Player(1): progressive frame seen after
2 interlaced frames
2012-06-12 19:58:11.576636 I VDPAU: Added 2 output surfaces (total 4, max 4)
2012-06-12 19:58:11.588963 I AFD: EIA-708 caption service #1 is in
the Undetermined language.
2012-06-12 19:58:11.588978 I Dec: Selected track #1 in the
Undetermined language(7695972)
2012-06-12 19:58:11.632076 I Player(1): Disabled deinterlacing
2012-06-12 19:58:11.862474 I AFD: EIA-708 caption service #1 is in
the Undetermined language.
2012-06-12 19:58:11.862489 I AFD: EIA-608 caption service #1 is in
the Undetermined language.
2012-06-12 19:58:11.878541 I Dec: Selected track #1 in the
Undetermined language(7695972)
2012-06-12 19:58:13.046085 I TV: SetActive(0,w/o OSD) 0 -> 0 -- begin
2012-06-12 19:58:13.046112 I TV: SetActive(0,w/o OSD) 0 -> 0 -- end
2012-06-12 19:58:13.063657 I TV: HandleStateChange(0) -- begin
2012-06-12 19:58:13.063673 I TV: Attempting to change from
WatchingPreRecorded to None
2012-06-12 19:58:13.063688 I TV: StopStuff() for player ctx 0 -- begin
2012-06-12 19:58:13.063698 I TV: SetActive(0,w/o OSD) 0 -> 0 -- begin
2012-06-12 19:58:13.063712 I TV: SetActive(0,w/o OSD) 0 -> 0 -- end
2012-06-12 19:58:13.063720 I Player(1): StopPlaying - begin
2012-06-12 19:58:13.075193 I Player(1): Decoder thread exiting.
2012-06-12 19:58:13.075295 I Player(1): Exited decoder loop.
2012-06-12 19:58:13.075992 I VidOutVDPAU: DiscardFrames(1)
2012-06-12 19:58:13.076029 I VideoBuffers::DiscardFrames(1): AUUUUUUUUUUuuL
2012-06-12 19:58:13.076054 I VideoBuffers::DiscardFrames(1):
AAAAAAAAAAAAAA -- done
2012-06-12 19:58:13.076070 I VidOutVDPAU: DiscardFrames() 3:
AAAAAAAAAAAAAA -- done()
2012-06-12 19:58:13.077283 I VDPAU Painter: Clearing VDPAU painter cache.
2012-06-12 19:58:13.116862 I AO: Killing AudioOutputDSP
2012-06-12 19:58:13.122869 I AO: OutputAudioLoop: Stop Event
2012-06-12 19:58:13.122889 I AO: kickoffOutputAudioLoop exiting
2012-06-12 19:58:13.132409 I Player(1): StopPlaying - end
2012-06-12 19:58:13.132422 I TV: StopStuff(): stopping ring buffer
2012-06-12 19:58:13.132448 I TV: StopStuff(): stopping player
2012-06-12 19:58:13.132460 I TV: StopStuff() -- end
2012-06-12 19:58:13.132474 I TV: Changing from WatchingPreRecorded to None
2012-06-12 19:58:13.132487 I TV: HandleStateChange(0) -- end
2012-06-12 19:58:13.132500 I TV: Exiting main playback loop.
2012-06-12 19:58:13.132507 I TV: StartTV -- process events 2 begin
2012-06-12 19:58:13.132773 I TV: StartTV -- process events 2 end
2012-06-12 19:58:13.132788 I TV::~TV() -- begin
2012-06-12 19:58:13.143397 I TV::~TV() -- lock
2012-06-12 19:58:13.143496 I Player(1): StopPlaying - begin
2012-06-12 19:58:13.143512 I Player(1): Exited decoder loop.
2012-06-12 19:58:13.143520 I Player(1): StopPlaying - end
2012-06-12 19:58:13.145942 I TV::~TV() -- end
2012-06-12 19:58:13.146486 N Suspending idle timer
2012-06-12 19:58:13.146494 I TV: StartTV -- end
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://www.mythtv.org/mailman/listinfo/mythtv-users

icicimov at gmail

Jun 12, 2012, 6:53 PM

Post #4 of 15 (972 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Wed, Jun 13, 2012 at 3:40 AM, jr <jraymyth [at] gmail> wrote:

> I have a fresh install of Ubuntu 12.04 and MythBuntu 0.25 FE/BE. The
> install went without a hitch. The tuners and channels are all
> configured. Blah blah blah. The problem I am having is with the
> audio.
>
> I went through the Setup Wizard and set the audio device
> (ALSA:hdmi:CARD=NVidia,DEV=1). The speaker test hissed as expected.
> Video Playback Profile is set to VDPAU High Quality. Test High
> Definition plays me a nice movie intro of someone walking across icy
> mountains. The incidental music is clear and audible.
>
> So I went to make a recording and played it. The video was clear, but
> no audio was emitted. The recording does have sound when played
> through VLC. I figure that its a config problem, but of what? ALSA
> is clearly working with the HDMI port. MythTV is communicating with
> ALSA, in the setup at the least. I don't mind digging in...but where
> do I dig?
>
> Thanks,
> jr
>
> Intel DQ67EP (i5) -- Onboard audio is disabled in the bios
> MSI N210-MD512H GeForce 210 512MB
> 4GB
>
>
> mythuser [at] Jotu:~$ aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: PCH [HDA Intel PCH], device 0: ALC888 Analog [ALC888 Analog]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 0: PCH [HDA Intel PCH], device 1: ALC888 Digital [ALC888 Digital]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

"2012-06-12 19:58:11.009507 E ALSA: Error opening
/proc/asound/card1/pcm7p/sub0/prealloc: Permission denied.
2012-06-12 19:58:11.009521 E ALSA: Try to manually increase audio
buffer with: echo 128 | sudo tee
/proc/asound/card1/pcm7p/sub0/prealloc
2012-06-12 19:58:11.009535 E ALSA: Unable to sufficiently increase
ALSA hardware buffer size - underruns are likely
2012-06-12 19:58:11.009543 I ALSA: OpenDevice
hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
passthrough"

You might also check the user permissions on /dev/asound directory and if
the user you are running MythTV with belongs to video and audio groups. I'm
not an expert in Myth audio but looks like it tries to open the device 7 on
the Nvidia card for playback?

You might also try to increase the buffer size manually as the error
suggests. Run

$ echo 4096 > /proc/asound/card1/pcm7p/sub0/prealloc

and see what happens. If the command fails with permissions issue then you
really have a problem with your Myth user editing the ALSA files. Fix the
permissions or run the command as root and start the playback again to see
if things have improved.

Igor

jraymyth at gmail

Jun 12, 2012, 7:33 PM

Post #5 of 15 (970 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Tue, Jun 12, 2012 at 9:53 PM, Igor Cicimov <icicimov [at] gmail> wrote:
> On Wed, Jun 13, 2012 at 3:40 AM, jr <jraymyth [at] gmail> wrote:
>>
>> I have a fresh install of Ubuntu 12.04 and MythBuntu 0.25 FE/BE. The
>> install went without a hitch. The tuners and channels are all
>> configured. Blah blah blah. The problem I am having is with the
>> audio.
>>
>> I went through the Setup Wizard and set the audio device
>> (ALSA:hdmi:CARD=NVidia,DEV=1). The speaker test hissed as expected.
>> Video Playback Profile is set to VDPAU High Quality. Test High
>> Definition plays me a nice movie intro of someone walking across icy
>> mountains. The incidental music is clear and audible.
>>
>> So I went to make a recording and played it. The video was clear, but
>> no audio was emitted. The recording does have sound when played
>> through VLC. I figure that its a config problem, but of what? ALSA
>> is clearly working with the HDMI port. MythTV is communicating with
>> ALSA, in the setup at the least. I don't mind digging in...but where
>> do I dig?
>>
>> Thanks,
>> jr
>>
>> Intel DQ67EP (i5) -- Onboard audio is disabled in the bios
>> MSI N210-MD512H GeForce 210 512MB
>> 4GB
>>
>>
>> mythuser [at] Jotu:~$ aplay -l
>> **** List of PLAYBACK Hardware Devices ****
>> card 0: PCH [HDA Intel PCH], device 0: ALC888 Analog [ALC888 Analog]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 0: PCH [HDA Intel PCH], device 1: ALC888 Digital [ALC888 Digital]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 1: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 1: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> card 1: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
>> Subdevices: 1/1
>> Subdevice #0: subdevice #0
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users [at] mythtv
>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>
>
>
> "2012-06-12 19:58:11.009507 E ALSA: Error opening
> /proc/asound/card1/pcm7p/sub0/prealloc: Permission denied.
> 2012-06-12 19:58:11.009521 E ALSA: Try to manually increase audio
> buffer with: echo 128 | sudo tee
> /proc/asound/card1/pcm7p/sub0/prealloc
> 2012-06-12 19:58:11.009535 E ALSA: Unable to sufficiently increase
> ALSA hardware buffer size - underruns are likely
> 2012-06-12 19:58:11.009543 I ALSA: OpenDevice
> hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
> passthrough"
>
> You might also check the user permissions on /dev/asound directory and if
> the user you are running MythTV with belongs to video and audio groups. I'm
> not an expert in Myth audio but looks like it tries to open the device 7 on
> the Nvidia card for playback?
>
> You might also try to increase the buffer size manually as the error
> suggests. Run
>
> $ echo 4096 > /proc/asound/card1/pcm7p/sub0/prealloc
>
> and see what happens. If the command fails with permissions issue then you
> really have a problem with your Myth user editing the ALSA files. Fix the
> permissions or run the command as root and start the playback again to see
> if things have improved.
>
> Igor
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

I added my user to the audio group : usermod -a -G audio mythuser
and did a
echo 4096 > /proc/asound/card1/pcm7p/sub0/prealloc

The overrun and permission denied lines went away. but still no sound
during playback. No change when running mythfrontend as root.

Is sound managed differently in the Setup Wizard than it is during playback?

***Latest Log***
2012-06-12 22:26:37.674113 I AFD: Opened codec 0x470ef50, id(AC3) type(Audio)
2012-06-12 22:26:37.674128 I AFD: Audio Track #2, with type 0 is A/V
stream #2 and has 2 channels in the Spanish; Castilian
language(7565409).
2012-06-12 22:26:37.674143 I AFD: Trying to select default track
2012-06-12 22:26:37.674148 I AFD: Trying to select audio track (w/lang)
2012-06-12 22:26:37.674608 I AFD: Selected track 1: English AC3 2ch
(A/V Stream #1)
2012-06-12 22:26:37.674621 I AFD: Initializing audio parms from audio track #1
2012-06-12 22:26:37.674639 I AFD: Audio format changed
from id(NONE) -1Hz -1ch -1bps (profile 0) to id( AC3)
48000Hz 2ch 16bps pt (profile 0)
2012-06-12 22:26:37.674656 I AO: Setting AC3 passthrough
2012-06-12 22:26:37.675238 I SPDIFEncoder: Creating spdif encoder (for AC3)
2012-06-12 22:26:37.675243 I AO: Killing AudioOutputDSP
2012-06-12 22:26:37.675251 I AO: Original codec was AC3, signed 16
bit, 48 kHz, 2 channels
2012-06-12 22:26:37.675266 I AO: enc(0), passthru(1), features
(AC3,DTS) configured_channels(2), 2 channels supported(1)
max_channels(2)
2012-06-12 22:26:37.675278 I AO: Opening audio device
'hdmi:CARD=NVidia,DEV=1' ch 2(2) sr 48000 sf signed 16 bit reenc 0
2012-06-12 22:26:37.675285 I ALSA: OpenDevice
hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
passthrough
2012-06-12 22:26:37.683536 I ALSA: SetParameters(format=2,
channels=2, rate=48000, buffer_time=500000, period_time=4)
2012-06-12 22:26:37.683615 I ALSA: Buffer size range from 64 to 1048576
2012-06-12 22:26:37.683625 I ALSA: Period size range from 32 to 524288
2012-06-12 22:26:37.683652 I ALSA: Buffer time = 500000 us
2012-06-12 22:26:37.683673 I ALSA: Period time = 5 periods
2012-06-12 22:26:37.802580 I ALSA: Buffer size = 24000 | Period size = 4800
2012-06-12 22:26:37.898559 I AO: Audio fragment size: 9600
2012-06-12 22:26:37.898584 I AO: Audio Stretch Factor: 1
2012-06-12 22:26:37.898693 I AO: Ending Reconfigure()
2012-06-12 22:26:37.898723 I Dec: Selected track #1 in the Unknown language(0)
2012-06-12 22:26:37.898739 I Dec: Resyncing position map.
posmapStarted = 0 livetv(0) watchingRec(0)
2012-06-12 22:26:37.898851 I AO: kickoffOutputAudioLoop: pid = 3096
2012-06-12 22:26:37.898874 I AO: OutputAudioLoop: Play Event
2012-06-12 22:26:37.899499 I Dec: Position map filled from DB to: 2352
2012-06-12 22:26:37.899516 I Dec: SyncPositionMap prerecorded, from
DB: 99 entries
2012-06-12 22:26:37.899528 I Dec: SyncPositionMap, new totframes:
2352, new length: 39, posMap size: 99
2012-06-12 22:26:38.141460 I AFD: Position map found
2012-06-12 22:26:38.141479 I AFD: Successfully opened decoder for
file: "/var/lib/mythtv/recordings/1081_20120612111100.mpg". novideo(0)
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://www.mythtv.org/mailman/listinfo/mythtv-users

icicimov at gmail

Jun 12, 2012, 8:03 PM

Post #6 of 15 (965 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

Did you try with "ALSA:hdmi:CARD=NVidia,DEV=3" or DEV=7 in the audio setup?
Sorry fot top post im typing this on my phone. If not available as
selection i think you can manually edit it.
On Jun 13, 2012 12:33 PM, "jr" <jraymyth [at] gmail> wrote:

> On Tue, Jun 12, 2012 at 9:53 PM, Igor Cicimov <icicimov [at] gmail> wrote:
> > On Wed, Jun 13, 2012 at 3:40 AM, jr <jraymyth [at] gmail> wrote:
> >>
> >> I have a fresh install of Ubuntu 12.04 and MythBuntu 0.25 FE/BE. The
> >> install went without a hitch. The tuners and channels are all
> >> configured. Blah blah blah. The problem I am having is with the
> >> audio.
> >>
> >> I went through the Setup Wizard and set the audio device
> >> (ALSA:hdmi:CARD=NVidia,DEV=1). The speaker test hissed as expected.
> >> Video Playback Profile is set to VDPAU High Quality. Test High
> >> Definition plays me a nice movie intro of someone walking across icy
> >> mountains. The incidental music is clear and audible.
> >>
> >> So I went to make a recording and played it. The video was clear, but
> >> no audio was emitted. The recording does have sound when played
> >> through VLC. I figure that its a config problem, but of what? ALSA
> >> is clearly working with the HDMI port. MythTV is communicating with
> >> ALSA, in the setup at the least. I don't mind digging in...but where
> >> do I dig?
> >>
> >> Thanks,
> >> jr
> >>
> >> Intel DQ67EP (i5) -- Onboard audio is disabled in the bios
> >> MSI N210-MD512H GeForce 210 512MB
> >> 4GB
> >>
> >>
> >> mythuser [at] Jotu:~$ aplay -l
> >> **** List of PLAYBACK Hardware Devices ****
> >> card 0: PCH [HDA Intel PCH], device 0: ALC888 Analog [ALC888 Analog]
> >> Subdevices: 1/1
> >> Subdevice #0: subdevice #0
> >> card 0: PCH [HDA Intel PCH], device 1: ALC888 Digital [ALC888 Digital]
> >> Subdevices: 1/1
> >> Subdevice #0: subdevice #0
> >> card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
> >> Subdevices: 1/1
> >> Subdevice #0: subdevice #0
> >> card 1: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
> >> Subdevices: 1/1
> >> Subdevice #0: subdevice #0
> >> card 1: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
> >> Subdevices: 1/1
> >> Subdevice #0: subdevice #0
> >> card 1: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
> >> Subdevices: 1/1
> >> Subdevice #0: subdevice #0
> >> _______________________________________________
> >> mythtv-users mailing list
> >> mythtv-users [at] mythtv
> >> http://www.mythtv.org/mailman/listinfo/mythtv-users
> >
> >
> >
> > "2012-06-12 19:58:11.009507 E ALSA: Error opening
> > /proc/asound/card1/pcm7p/sub0/prealloc: Permission denied.
> > 2012-06-12 19:58:11.009521 E ALSA: Try to manually increase audio
> > buffer with: echo 128 | sudo tee
> > /proc/asound/card1/pcm7p/sub0/prealloc
> > 2012-06-12 19:58:11.009535 E ALSA: Unable to sufficiently increase
> > ALSA hardware buffer size - underruns are likely
> > 2012-06-12 19:58:11.009543 I ALSA: OpenDevice
> > hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
> > passthrough"
> >
> > You might also check the user permissions on /dev/asound directory and if
> > the user you are running MythTV with belongs to video and audio groups.
> I'm
> > not an expert in Myth audio but looks like it tries to open the device 7
> on
> > the Nvidia card for playback?
> >
> > You might also try to increase the buffer size manually as the error
> > suggests. Run
> >
> > $ echo 4096 > /proc/asound/card1/pcm7p/sub0/prealloc
> >
> > and see what happens. If the command fails with permissions issue then
> you
> > really have a problem with your Myth user editing the ALSA files. Fix the
> > permissions or run the command as root and start the playback again to
> see
> > if things have improved.
> >
> > Igor
> >
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users [at] mythtv
> > http://www.mythtv.org/mailman/listinfo/mythtv-users
> >
>
> I added my user to the audio group : usermod -a -G audio mythuser
> and did a
> echo 4096 > /proc/asound/card1/pcm7p/sub0/prealloc
>
> The overrun and permission denied lines went away. but still no sound
> during playback. No change when running mythfrontend as root.
>
> Is sound managed differently in the Setup Wizard than it is during
> playback?
>
> ***Latest Log***
> 2012-06-12 22:26:37.674113 I AFD: Opened codec 0x470ef50, id(AC3)
> type(Audio)
> 2012-06-12 22:26:37.674128 I AFD: Audio Track #2, with type 0 is A/V
> stream #2 and has 2 channels in the Spanish; Castilian
> language(7565409).
> 2012-06-12 22:26:37.674143 I AFD: Trying to select default track
> 2012-06-12 22:26:37.674148 I AFD: Trying to select audio track (w/lang)
> 2012-06-12 22:26:37.674608 I AFD: Selected track 1: English AC3 2ch
> (A/V Stream #1)
> 2012-06-12 22:26:37.674621 I AFD: Initializing audio parms from audio
> track #1
> 2012-06-12 22:26:37.674639 I AFD: Audio format changed
> from id(NONE) -1Hz -1ch -1bps (profile 0)
> to id( AC3)
> 48000Hz 2ch 16bps pt (profile 0)
> 2012-06-12 22:26:37.674656 I AO: Setting AC3 passthrough
> 2012-06-12 22:26:37.675238 I SPDIFEncoder: Creating spdif encoder (for
> AC3)
> 2012-06-12 22:26:37.675243 I AO: Killing AudioOutputDSP
> 2012-06-12 22:26:37.675251 I AO: Original codec was AC3, signed 16
> bit, 48 kHz, 2 channels
> 2012-06-12 22:26:37.675266 I AO: enc(0), passthru(1), features
> (AC3,DTS) configured_channels(2), 2 channels supported(1)
> max_channels(2)
> 2012-06-12 22:26:37.675278 I AO: Opening audio device
> 'hdmi:CARD=NVidia,DEV=1' ch 2(2) sr 48000 sf signed 16 bit reenc 0
> 2012-06-12 22:26:37.675285 I ALSA: OpenDevice
> hdmi:CARD=NVidia,DEV=1,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01 for
> passthrough
> 2012-06-12 22:26:37.683536 I ALSA: SetParameters(format=2,
> channels=2, rate=48000, buffer_time=500000, period_time=4)
> 2012-06-12 22:26:37.683615 I ALSA: Buffer size range from 64 to 1048576
> 2012-06-12 22:26:37.683625 I ALSA: Period size range from 32 to 524288
> 2012-06-12 22:26:37.683652 I ALSA: Buffer time = 500000 us
> 2012-06-12 22:26:37.683673 I ALSA: Period time = 5 periods
> 2012-06-12 22:26:37.802580 I ALSA: Buffer size = 24000 | Period size =
> 4800
> 2012-06-12 22:26:37.898559 I AO: Audio fragment size: 9600
> 2012-06-12 22:26:37.898584 I AO: Audio Stretch Factor: 1
> 2012-06-12 22:26:37.898693 I AO: Ending Reconfigure()
> 2012-06-12 22:26:37.898723 I Dec: Selected track #1 in the Unknown
> language(0)
> 2012-06-12 22:26:37.898739 I Dec: Resyncing position map.
> posmapStarted = 0 livetv(0) watchingRec(0)
> 2012-06-12 22:26:37.898851 I AO: kickoffOutputAudioLoop: pid = 3096
> 2012-06-12 22:26:37.898874 I AO: OutputAudioLoop: Play Event
> 2012-06-12 22:26:37.899499 I Dec: Position map filled from DB to: 2352
> 2012-06-12 22:26:37.899516 I Dec: SyncPositionMap prerecorded, from
> DB: 99 entries
> 2012-06-12 22:26:37.899528 I Dec: SyncPositionMap, new totframes:
> 2352, new length: 39, posMap size: 99
> 2012-06-12 22:26:38.141460 I AFD: Position map found
> 2012-06-12 22:26:38.141479 I AFD: Successfully opened decoder for
> file: "/var/lib/mythtv/recordings/1081_20120612111100.mpg". novideo(0)
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

jraymyth at gmail

Jun 12, 2012, 8:43 PM

Post #7 of 15 (958 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Tue, Jun 12, 2012 at 11:03 PM, Igor Cicimov <icicimov [at] gmail> wrote:
> Did you try with "ALSA:hdmi:CARD=NVidia,DEV=3" or DEV=7 in the audio setup?
> Sorry fot top post im typing this on my phone. If not available as selection
> i think you can manually edit it.
>

Hmmm. This is confusing. Using 7 in that line resulted in a no
device found error. But it got me wondering, so I went thru all of my
listed devices with DEV=7, and found one that works.

ALSA:dmix:CARD=NVidia,DEV=7

This is good, but I dont understand why the HDMI line does not.

I have an
ALSA:hdmi:CARD=NVidia,DEV=0
ALSA:hdmi:CARD=NVidia,DEV=1*
ALSA:hdmi:CARD=NVidia,DEV=2
ALSA:hdmi:CARD=NVidia,DEV=3

*A connection is found by MythTV. Clicking "Test" yields the test
hiss in alternating speakers. No sound when playing a recording.

Also:
ALSA:hw:CARD=NVidia,DEV=3
ALSA:hw:CARD=NVidia,DEV=7**
ALSA:hw:CARD=NVidia,DEV=8
ALSA:hw:CARD=NVidia,DEV=9
**A connection is found by MythTV. Clicking "Test" yields the test
hiss in alternating speakers. I hear a fast fluttering sound when
playing a recording.

Also:
ALSA:plughw:CARD=NVidia,DEV=3
ALSA:plughw:CARD=NVidia,DEV=7**
ALSA:plughw:CARD=NVidia,DEV=8
ALSA:plughw:CARD=NVidia,DEV=9
**A connection is found by MythTV. Clicking "Test" yields the test
hiss in alternating speakers. I hear a fast fluttering sound when
playing a recording.
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://www.mythtv.org/mailman/listinfo/mythtv-users

icicimov at gmail

Jun 12, 2012, 9:02 PM

Post #8 of 15 (966 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Wed, Jun 13, 2012 at 1:43 PM, jr <jraymyth [at] gmail> wrote:

> On Tue, Jun 12, 2012 at 11:03 PM, Igor Cicimov <icicimov [at] gmail> wrote:
> > Did you try with "ALSA:hdmi:CARD=NVidia,DEV=3" or DEV=7 in the audio
> setup?
> > Sorry fot top post im typing this on my phone. If not available as
> selection
> > i think you can manually edit it.
> >
>
> Hmmm. This is confusing. Using 7 in that line resulted in a no
> device found error. But it got me wondering, so I went thru all of my
> listed devices with DEV=7, and found one that works.
>
> ALSA:dmix:CARD=NVidia,DEV=7
>
> This is good, but I dont understand why the HDMI line does not.
>
> I have an
> ALSA:hdmi:CARD=NVidia,DEV=0
> ALSA:hdmi:CARD=NVidia,DEV=1*
> ALSA:hdmi:CARD=NVidia,DEV=2
> ALSA:hdmi:CARD=NVidia,DEV=3
>
> *A connection is found by MythTV. Clicking "Test" yields the test
> hiss in alternating speakers. No sound when playing a recording.
>
> Also:
> ALSA:hw:CARD=NVidia,DEV=3
> ALSA:hw:CARD=NVidia,DEV=7**
> ALSA:hw:CARD=NVidia,DEV=8
> ALSA:hw:CARD=NVidia,DEV=9
> **A connection is found by MythTV. Clicking "Test" yields the test
> hiss in alternating speakers. I hear a fast fluttering sound when
> playing a recording.
>
> Also:
> ALSA:plughw:CARD=NVidia,DEV=3
> ALSA:plughw:CARD=NVidia,DEV=7**
> ALSA:plughw:CARD=NVidia,DEV=8
> ALSA:plughw:CARD=NVidia,DEV=9
> **A connection is found by MythTV. Clicking "Test" yields the test
> hiss in alternating speakers. I hear a fast fluttering sound when
> playing a recording.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

Yep now that you mentioned it I remembered, the HDMI option was not working
for me too. I think has something to do with the channels, format and
sampling rate which needs to be 48KHz for the digital output (I think).
That's why you need to choose the software mixing plugin device and not the
hardware device it self. Then the dmix plugin probably uses the hardware
device as slave PCM.

So it goes something like this:

# This is the DMIX device you chose and it uses a PCM slave called here
"digital-hdmi"
pcm.dmix {
type dmix
ipc_key 1235
slave {
pcm "digital-hdmi"
period_time 0
period_size 1024
buffer_size 4096
rate 48000
}
}

# This is the hardware device it self, Nvidia HDMI, which is
card=1,device=7 in your case
# and is being used in the above dmix device as slave
pcm.digital-hdmi {
type hw
card 1
device 7
}

Please note that this is from my understanding of how ALSA works :) It's
little bit complicated and I'm sure you can get much better explanation
from some of the audio experts here like Jean-Yves. I would also appreciate
if they correct me if I'm wrong so we both learn something too :)

Igor

icicimov at gmail

Jun 12, 2012, 9:08 PM

Post #9 of 15 (962 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Wed, Jun 13, 2012 at 2:02 PM, Igor Cicimov <icicimov [at] gmail> wrote:

>
>
> On Wed, Jun 13, 2012 at 1:43 PM, jr <jraymyth [at] gmail> wrote:
>
>> On Tue, Jun 12, 2012 at 11:03 PM, Igor Cicimov <icicimov [at] gmail>
>> wrote:
>> > Did you try with "ALSA:hdmi:CARD=NVidia,DEV=3" or DEV=7 in the audio
>> setup?
>> > Sorry fot top post im typing this on my phone. If not available as
>> selection
>> > i think you can manually edit it.
>> >
>>
>> Hmmm. This is confusing. Using 7 in that line resulted in a no
>> device found error. But it got me wondering, so I went thru all of my
>> listed devices with DEV=7, and found one that works.
>>
>> ALSA:dmix:CARD=NVidia,DEV=7
>>
>>
One other thing that comes to mind ... Do you have the "Software mixer"
option ticked or not?

Igor

> This is good, but I dont understand why the HDMI line does not.
>>
>> I have an
>> ALSA:hdmi:CARD=NVidia,DEV=0
>> ALSA:hdmi:CARD=NVidia,DEV=1*
>> ALSA:hdmi:CARD=NVidia,DEV=2
>> ALSA:hdmi:CARD=NVidia,DEV=3
>>
>> *A connection is found by MythTV. Clicking "Test" yields the test
>> hiss in alternating speakers. No sound when playing a recording.
>>
>> Also:
>> ALSA:hw:CARD=NVidia,DEV=3
>> ALSA:hw:CARD=NVidia,DEV=7**
>> ALSA:hw:CARD=NVidia,DEV=8
>> ALSA:hw:CARD=NVidia,DEV=9
>> **A connection is found by MythTV. Clicking "Test" yields the test
>> hiss in alternating speakers. I hear a fast fluttering sound when
>> playing a recording.
>>
>> Also:
>> ALSA:plughw:CARD=NVidia,DEV=3
>> ALSA:plughw:CARD=NVidia,DEV=7**
>> ALSA:plughw:CARD=NVidia,DEV=8
>> ALSA:plughw:CARD=NVidia,DEV=9
>> **A connection is found by MythTV. Clicking "Test" yields the test
>> hiss in alternating speakers. I hear a fast fluttering sound when
>> playing a recording.
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users [at] mythtv
>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>>
>
> Yep now that you mentioned it I remembered, the HDMI option was not
> working for me too. I think has something to do with the channels, format
> and sampling rate which needs to be 48KHz for the digital output (I think).
> That's why you need to choose the software mixing plugin device and not the
> hardware device it self. Then the dmix plugin probably uses the hardware
> device as slave PCM.
>
> So it goes something like this:
>
> # This is the DMIX device you chose and it uses a PCM slave called here
> "digital-hdmi"
> pcm.dmix {
> type dmix
> ipc_key 1235
> slave {
> pcm "digital-hdmi"
> period_time 0
> period_size 1024
> buffer_size 4096
> rate 48000
> }
> }
>
> # This is the hardware device it self, Nvidia HDMI, which is
> card=1,device=7 in your case
> # and is being used in the above dmix device as slave
> pcm.digital-hdmi {
> type hw
> card 1
> device 7
> }
>
>
> Please note that this is from my understanding of how ALSA works :) It's
> little bit complicated and I'm sure you can get much better explanation
> from some of the audio experts here like Jean-Yves. I would also appreciate
> if they correct me if I'm wrong so we both learn something too :)
>
> Igor
>

jyavenard at gmail

Jun 12, 2012, 11:49 PM

Post #10 of 15 (950 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On 13 June 2012 11:53, Igor Cicimov <icicimov [at] gmail> wrote:

> You might also check the user permissions on /dev/asound directory and if
> the user you are running MythTV with belongs to video and audio groups. I'm
> not an expert in Myth audio but looks like it tries to open the device 7 on
> the Nvidia card for playback?

useless as he's not using OSS but ALSA.
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://www.mythtv.org/mailman/listinfo/mythtv-users

jyavenard at gmail

Jun 13, 2012, 12:02 AM

Post #11 of 15 (952 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

Hi

On 13 June 2012 13:43, jr <jraymyth [at] gmail> wrote:

> Hmmm. This is confusing. Using 7 in that line resulted in a no
> device found error. But it got me wondering, so I went thru all of my
> listed devices with DEV=7, and found one that works.
>
> ALSA:dmix:CARD=NVidia,DEV=7

I think you can safely ignore whatever Igor has suggested, none of his
suggestions make any sense, and even less so with any modern linux
distributions

From looking at the original logs you have provided:

The audio device you have connected doesn't support AC3/DTS, only stereo PCM.
So yes, you would hear audio because the audio test will only try stereo.
Here you're trying to play AC3 which your audio device (TV) doesn't support.
You have configured your machine and enable AC3/DTS passthrough.
Uncheck those. Keep audio as Stereo.

As you're running a very recent version of ALSA, you can see what your
audio device supports in the help description at the bottom of the
screen when you move the cursor to the audio device name (here
ALSA:hdmi:blah

If you believe your TV does support AC3/DTS (which would be very
surprising but who knows...)

It could be a problem I've seen with very recent version of ALSA if at
any time you put your PC to sleep and turned it back on before the TV
was on. The ELD value isn't read properly and ALSA disable some audio
options

Try rebooting your PC, making sure the TV/amplifier is on before the PC reboot.

Jean-Yves
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://www.mythtv.org/mailman/listinfo/mythtv-users

jyavenard at gmail

Jun 13, 2012, 12:05 AM

Post #12 of 15 (957 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

Hi

On 13 June 2012 14:02, Igor Cicimov <icicimov [at] gmail> wrote:

> Yep now that you mentioned it I remembered, the HDMI option was not working
> for me too. I think has something to do with the channels, format and
> sampling rate which needs to be 48KHz for the digital output (I think).

Maybe in 2008 with myth 0.21/0.22 that would have been required.
Certainly not today

> That's why you need to choose the software mixing plugin device and not the
> hardware device it self. Then the dmix plugin probably uses the hardware
> device as slave PCM.

only if you do not want digital passthrough, which with hdmi is rather
unfortunate.

It would allow you however to enjoy audio from more than one
application at a time.

But a much easier dmix configuration would then be:

pcm.!default {
type plug
slave.pcm "dmix:1,3"
}

where in dmix:1,3, 1 is the hardware card and 3 is the device number.
and in myth you would then use ALSA:default
as device name
_______________________________________________
mythtv-users mailing list
mythtv-users [at] mythtv
http://www.mythtv.org/mailman/listinfo/mythtv-users

icicimov at gmail

Jun 13, 2012, 12:32 AM

Post #13 of 15 (953 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Wed, Jun 13, 2012 at 5:05 PM, Jean-Yves Avenard <jyavenard [at] gmail>wrote:

> Hi
>
> On 13 June 2012 14:02, Igor Cicimov <icicimov [at] gmail> wrote:
>
> > Yep now that you mentioned it I remembered, the HDMI option was not
> working
> > for me too. I think has something to do with the channels, format and
> > sampling rate which needs to be 48KHz for the digital output (I think).
>
> Maybe in 2008 with myth 0.21/0.22 that would have been required.
> Certainly not today
>
> > That's why you need to choose the software mixing plugin device and not
> the
> > hardware device it self. Then the dmix plugin probably uses the hardware
> > device as slave PCM.
>
> only if you do not want digital passthrough, which with hdmi is rather
> unfortunate.
>
> It would allow you however to enjoy audio from more than one
> application at a time.
>
> But a much easier dmix configuration would then be:
>
> pcm.!default {
> type plug
> slave.pcm "dmix:1,3"
> }
>
> where in dmix:1,3, 1 is the hardware card and 3 is the device number.
> and in myth you would then use ALSA:default
> as device name
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

Haha as I said we gonna learn something here :)

Maybe in 2008 with myth 0.21/0.22 that would have been required.
> Certainly not today

Yep that's exactly the year I've set-up HDMI on MythTV 0.20 using dmix
plugin. Otherwise no way to get audio over HDMI.

Thanks,
Igor

icicimov at gmail

Jun 13, 2012, 1:07 AM

Post #14 of 15 (948 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

Confusing thing here is why Myth offers (ALSA:hdmi:CARD=NVidia,DEV=1) as
output device option which is different from aplay -l output? Shouldn't it
be DEV=3 as I said before?
Maybe the output of aplay -L would be useful too.
On Jun 13, 2012 5:02 PM, "Jean-Yves Avenard" <jyavenard [at] gmail> wrote:

> Hi
>
>
> On 13 June 2012 13:43, jr <jraymyth [at] gmail> wrote:
>
> > Hmmm. This is confusing. Using 7 in that line resulted in a no
> > device found error. But it got me wondering, so I went thru all of my
> > listed devices with DEV=7, and found one that works.
> >
> > ALSA:dmix:CARD=NVidia,DEV=7
>
> I think you can safely ignore whatever Igor has suggested, none of his
> suggestions make any sense, and even less so with any modern linux
> distributions
>
> From looking at the original logs you have provided:
>
> The audio device you have connected doesn't support AC3/DTS, only stereo
> PCM.
> So yes, you would hear audio because the audio test will only try stereo.
> Here you're trying to play AC3 which your audio device (TV) doesn't
> support.
> You have configured your machine and enable AC3/DTS passthrough.
> Uncheck those. Keep audio as Stereo.
>
> As you're running a very recent version of ALSA, you can see what your
> audio device supports in the help description at the bottom of the
> screen when you move the cursor to the audio device name (here
> ALSA:hdmi:blah
>
> If you believe your TV does support AC3/DTS (which would be very
> surprising but who knows...)
>
> It could be a problem I've seen with very recent version of ALSA if at
> any time you put your PC to sleep and turned it back on before the TV
> was on. The ELD value isn't read properly and ALSA disable some audio
> options
>
> Try rebooting your PC, making sure the TV/amplifier is on before the PC
> reboot.
>
> Jean-Yves
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>

jyavenard at gmail

Jun 13, 2012, 7:17 AM

Post #15 of 15 (939 views)
Permalink

Re: Strange Audio Problem 0.25 [In reply to]

On Wednesday, 13 June 2012, Igor Cicimov wrote:

> Confusing thing here is why Myth offers (ALSA:hdmi:CARD=NVidia,DEV=1) as
> output device option which is different from aplay -l output? Shouldn't it
> be DEV=3 as I said before?
> Maybe the output of aplay -L would be useful too.
>
First, don't top-post.

Second, if you want to ask a question that isn't related to the OP problem,
open a new thread. Don't clutter this one with irrelevant and mostly wrong
advices

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