[mythtv-users] HD-PVR / Mythtv robustness

[Don Lewis]

On 12 Feb, Ken Bass wrote:
> On 2/12/2011 2:12 PM, Michael T. Dean wrote:
>> On 02/12/2011 10:00 AM, Ken Bass wrote:
>>> Occasionally something happens that causes a zero length recordin with
>>> the HD-PVR. When this happens I notice that the blue recording light is
>>> on. I am unsure if this is because it is 'stuck on' from a previous
>>> recording or related to the failed recording.
>>>
>>> My question is why can't Mythtv gracefully recover from this and in
>>> particular switch to using another tuner? When this condition triggers,
>>> the log shows:
>>>
>>> 2011-02-07 11:00:12.308 Channel(/dev/video-hdpvr1) Error:
>>> SetInputAndFormat(6, NTSC)
>>>                          while setting input (v4l v2)
>>>                          eno: Connection timed out (110)
>> ...
>>> 2011-02-07 11:00:42.330 Started recording: "Dog the Bounty Hunter":"No
>>> Luv Still": channel 2223 on cardid 6, sourceid 2
>>> 2011-02-07 11:00:43.573 AnalogSM(/dev/video-hdpvr1), Error: Start
>>> encoding failed
>>>                          eno: Resource temporarily unavailable (11)
>>>
>>> ( snip 26 minutes of repeats ...)
>> Looks like you need to change your timeouts.  In 0.24+, HD-PVR users 
>> must set appropriate (read, somewhere on the order of 10s) timeouts in 
>> mythtv-setup.
> 
> My timeout is set in the order of 10s. If you look at the log I posted,
> the timestamps indicate 10s inbetween each timeout print.
> However, I cannot believe that is the issue here. For a HD-PVR device,
> mythtv should NEVER be trying to SetInputAndFormat to NTSC.
> It seems to be an error that is not being handled and something is
> falling through to an invalid case. And I guess this raises another bug
> as to why mythtv-setup is not setting the timeout to 10 or so as a
> default when adding HD-PVR type tuner. If I recall, it defaults to
> perhaps 3 or 4 seconds.

After poking around a bit, I think NTSC is correct and ATSC is not.  My
HD-PVR advertises itself as a PAL & NTSC device.

# v4l2-ctl --get-standard -d /dev/video-hdpvr_0
Video Standard = 0x0000b900
	PAL-M/60
	NTSC-M/M-JP/M-KR

If SetInputAndFormat(..., "NTSC") fails, then SwitchToInput() tries
ATSC.