[mythtv-users] Change channel scripts

[Andrew C. Stadt]

On 08/11/2010 10:50 AM, Mike Bennett wrote:
>
>
> On 11/08/2010 08:28 AM, Michael PARKER wrote:
>>
>>> -----Original Message-----
>>> From: mythtv-users-bounces at mythtv.org 
>>> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of
>>> Mike Bennett
>>> Sent: 08 November 2010 00:30
>>> To: Discussion about MythTV
>>> Subject: Re: [mythtv-users] Change channel scripts
>>>
>>>
>>>
>>> On 11/04/2010 12:27 PM, Mike Bennett wrote:
>>>> Okay I am having a weird issue with my change channel scripts. I have
>>>> three turners and three Comcast DTA/100's connected via IR cable from
>>>> the MCEUSB blasters to the IR port on the back of the DTA.
>>>>
>>>> I am having two different issues happening. The first issue it seems
>>>> that about one out of every five recordings the channel does not
>>>> change at all. Let me explain, the DTA will display when a button is
>>>> pushed to change the channel and it get recorded by myth so I can see
>>>> when the channel is changed because it pops up a box in the lower
>>>> right hand corner to display the number buttons that are being pressed
>>>> just like using the remote. about every fifth or sixth recording does
>>>> the. The second issue is only one of two channel presses shows up. Ex.
>>>> like if the DTA is on 7 and it then tries to change to channel 16 I
>>>> will only see a 1 or usually the 6 show up so of course it recorded
>>>> the wrong channel. This happens about the same frequency as the other
>>>> problem but not at the same time.
>>>>
>>>> I have tried to change the interdigit time between press with the same
>>>> result and if I invoke the change channel script manually it works
>>>> every time. There is no rhyme or reason when this happens, I have seen
>>>> it happen when there are lots of recordings close together or when
>>>> there is only one show being recorded at all and it happens across all
>>>> tuners at different times. I'm not sure which logs to look at or if it
>>>> is a LIRC or Mythtv issue. I hoping someone can direct me in the right
>>>> direction. Oh yeah I have the front IR receiver on the DTA's covered
>>>> so they are not getting any stray IR signals.
>>>>
>>>> Here is my change channel script:
>>>>
>>>>   #!/bin/sh
>>>>   REMOTE_NAME=DTA
>>>>   irsend SET_TRANSMITTERS 1
>>>>   for digit in $(echo $1 | sed -e 's/./&  /g'); do
>>>>           irsend SEND_ONCE $REMOTE_NAME $digit
>>>>           sleep 0.4  # note, you may have to tweak the interdigit 
>>>> delay
>>>> up a bit, depending on your STB model
>>>>   done
>>>>   #irsend SEND_ONCE $REMOTE_NAME OK
>>>>   exit 0
>>>>
>>> Bump, anyone have any idea?
>>>
>>> -- 
>>> Regards,
>>>
>>> Mike Bennett
>>> mbppg.com
>>>
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>>> mythtv-users at mythtv.org
>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>> Mike,
>>
>> Does any form of onscreen EPG/menu pop up when you press a key on the 
>> remote?
>>
>> My old Cisco 4200DVB was, by default, set to pop up a "Now and Next" 
>> menu when you entered a channel number. The presence of this menu 
>> (well, presumably the h/w overhead required to display it) severely 
>> impacted the reliability of my IR blaster/channel change script to 
>> change channel. Once I disabled the "Now and Next menu", reliability 
>> improved dramatically.
>>
>> The backend log would be a good place start debugging - you should 
>> see the invocation of and return value from the channel change script 
>> in there. If you see the channel change script being invoked with the 
>> correct channel number and returning successfully, you can be pretty 
>> confident that the MythTV end of things is working as it should. Then 
>> it's just a matter of debugging the h/w.....
>>
>> Cheers,
>>
>> Mike Thanks Mike, unfortunately the DTA is a DUMB box no menus or the 
>> ability to turn items on or off. I blue box does pop up that the 
>> channel numbers display which is how I can tell when number are 
>> correct or missing.
> I will check the backend logs, it helps now that I know what I looking 
> for so thanks. I have a feeling it is something with the DTA's just 
> being a very low end settop box. Thanks for the info.
>
Do you only have the one DTA?  I was running into an issue with two 
boxes controlled by the same CommandIR (different emitters) when it was 
trying to change the channel on both at the same time - I had to add a 
simple lock to the channel change scripts around the SET_TRANSMITTER / 
SEND_ONCE commands.  I also had a secondary issue with another satellite 
box which kept getting stuck in interactive tv (even the remote which 
came with it couldn't always get it responsive - in the end I had to add 
a quick power-cycle in its channel change script.

Cheers,

Andrew.