[mythtv-users] Strange sound problem...

[Adrian Flynn]

Thanks for the suggestion, but the report went as far as ioctl:
VIDIOC_QUERYCTRL and then gave a continuous list repeating the following
four lines over and over:
    Brightness = 34655
    Contrast = 33680
    Saturation = 33310
    Hue = 31458

There was no mention of mute or volume.

I don't think that this is the problem, however, as my 'development'
frontend works with the same files.

Let me give another example of the problem.
    Using the _same recorded video_ ...
        The development frontend plays fine including sound
        The shuttle frontend plays the video beautifully, but with no sound
output.
    Deduction: the sound is being recorded, but the playback does not output
the sound => the PVR250 setup is OK in the backend
    Query: what is different between the output from a RTJPEG stream and a
MPEG2 stream
    Possibilities: 1. There is a library missing or silently failing on the
shuttle frontend
                    2.There is a configuration error on the sound output of
the shuttle frontend

Rgds


Adrian

zardoz at zardoz.ath.cx wrote:
> try a test_ioctl -a and watch for mute and volume-settings.
> mute should be 0 volume around 60000
>
> z
>
>
> On Wednesday 12 May 2004 10:29, Adrian Flynn wrote:
>> Steffen Schlink wrote:
>>> Joseph A. Caputo schrieb:
>>>> Are you using the TV-out of the PVR-350?  If so, the sound is
>>>> probably coming out of your -350 instead of your sound card.
>>>> MythMusic will use your sound card, though, and so will MythVideo
>>>> (unless you're using a patched mplayer).
>>>
>>> No, I'm not using the PVR TV-out. At the moment I'm just using a
>>> regular monitor for Video...
>>> But there is no sound at the PVR outputs.
>>>
>>> The recorded files (even the livetv buffer) are decoded in software
>>> when played back, aren't they?
>>> So the decoded mpeg audiostream has to go through any soundcard...
>>>
>>> Any other ideas?
>>
>> Hi Steffen
>>
>> Having just added a new PVR250 to my MythBackend whcih also contains
>> a cheap bt878 card (using btaudio) I can add the following
>>     information: On my development machine being used as a frontend,
>> using an integrated Ensoniq 5880 AudioPCI sound card (KM133
>> chipset), all works well.
>>
>>     On my living room frontend, which is a Shuttle SN45G (if I
>> remember correctly) using the NForce2 chipset, sound _works_ for
>> channels selected from the bttv card, but not the PVR250. I have
>> selected /dev/adsp as the output device and this is correctly routed
>> to the optical output of the Shuttle box (AC3 to SPDIF option is
>> set). I have also tried setting the output device to /dev/dsp, but
>> this kills the bttv sourced sound and MythMusic etc - in other
>> words, I get no sound at all on this setting.
>>
>> A CVS version of Myth from 10 May is being used.
>>
>> I haven't had the time yet to investigate further but if anyone has
>> any ideas, I'm all ears!
>>
>> Regards from Dublin, Ireland
>>
>> Adrian
>>
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