[mythtv-users] Analog cable on an HP KS523AA.

[Matt Gracie]

On 01/09/2016 02:24 PM, Matt Gracie wrote:
> On 01/09/2016 01:57 PM, Gary Buhrmaster wrote:
>> On Sat, Jan 9, 2016 at 6:33 PM, Matt Gracie <matt at roadflares.org> wrote:
>>> Is anyone using an HP KS523AA USB tuner (a rebadged Haupp 950Q, from
>>> what I've read) to record analog cable?

So, after a couple more hours of digging through mailing list archives
and trying options, I feel like I'm very close; the tuner is able to
record video from analog cable in Mythtv, but for some reason, it just
won't record audio. I get a bunch of entries like this in the
mythbackend.log file:

Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: I CoreContext
scheduler.cpp:704 (UpdateRecStatus) Updating status for "Paid
Programming" on ca
rdid 10 (Will Record => Recording)
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: I TVRecEvent
tv_rec.cpp:4126 (TuningNewRecorder) TVRec[10]: rec->GetPathname():
'/media/tv/100
4_20160109210800.nuv'
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: E TVRecEvent
recorders/audioinputalsa.cpp:336 (AlsaBad) AudioInALSA(hw:2,0): pcm open
failed:
Device or resource busy
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: E TVRecEvent
recorders/NuppelVideoRecorder.cpp:771 (AudioInit) NVR(/dev/video0):
Failed to ope
n audio device ALSA:hw:2,0
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: E TVRecEvent
recorders/NuppelVideoRecorder.cpp:699 (Initialize) NVR(/dev/video0):
Failed to in
it audio input device
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: N Scheduler
autoexpire.cpp:264 (CalcParams) AutoExpire: CalcParams(): Max required
Free Space:
 2.0 GB w/freq: 15 min
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: I Scheduler
scheduler.cpp:2098 (HandleReschedule) Reschedule requested for CHECK -2
15 0 Updat
eRecStatus2 | Paid Programming |  | Paid programming. | SH000000010000
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: I Scheduler
scheduler.cpp:2211 (HandleReschedule) Scheduled 7 items in 0.0 = 0.00
match + 0.00
 check + 0.00 place
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: E RecThread
recorders/NuppelVideoRecorder.cpp:1458 (DoV4L2) NVR(/dev/video0):
VIDIOC_S_CTRL:V4
L2_CID_AUDIO_MUTE: #012#011#011#011eno: Invalid argument (22)
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: E NVRAudio
recorders/audioinputalsa.cpp:336 (AlsaBad) AudioInALSA(hw:2,0): pcm open
failed: De
vice or resource busy
Jan  9 16:07:32 cupcake mythbackend: mythbackend[2149]: E NVRAudio
recorders/NuppelVideoRecorder.cpp:2387 (doAudioThread) NVR(/dev/video0):
Failed to
open audio device ALSA:hw:2,0

I know that ALSA device hw:2,0 is the proper device for the audio,
because if I record it manually with arecord and play it back with
aplay, it plays the sound for whatever Myth is recording. The sound
output on the box is configured properly; I can play back OTA recordings
from my HDhomerun without any problems. It's just getting these "Device
or resource busy" errors when attempting to open and record from mythtv.

I have a sneaking suspicion that this is an ALSA/Pulseaudio issue, but I
don't know where to look to debug it. Does anyone have any ideas?

Thanks in advance for your time and expertise,

--Matt

-- 
http://www.roadflares.org/blog

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