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| tuner connected to digital box not changing to channel 3 http://forum.linhes.org/viewtopic.php?f=2&t=10035 |
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| Author: | Irishcream [ Sun May 14, 2006 10:37 am ] |
| Post subject: | tuner connected to digital box not changing to channel 3 |
So i have a tuner askey tview99 (autodetected as card 38) and manually set to tuner 8 (though ive tried several tuners). In xawtv, i can change the channel to channel 3 and get the reception from my digital box. However, in mythtv, it seems to just leave the channel at 1. Is there some sort of fix for this? |
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| Author: | tjc [ Sun May 14, 2006 2:51 pm ] |
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Have you got the "Preset Tuner To Channel:" field filled in under the appropriate "Input Connection" and a valid tuner script that exits with a success indicator? |
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| Author: | Irishcream [ Sun May 14, 2006 2:55 pm ] |
| Post subject: | |
I have set the preset tuner to channel to channel 3 under the appropriate connection. I dont know if i have a valid tuner script. where/what's that? i know i can change the channel in xawtv, and once i set it to channel 3 in xawtv, it works fine in mythtv |
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| Author: | tjc [ Sun May 14, 2006 4:43 pm ] |
| Post subject: | |
"External Channel Change Command:" is the field just above the preset channel one. You need something in there for the preset to get used, even if it's just a dummy. For testing you can use /bin/true. Normally that would be the name of the script that drives the IR blaster or serial connection, or firewire connection , or ... whatever you use to change the channel on the cable box. |
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| Author: | Irishcream [ Sun May 14, 2006 4:46 pm ] |
| Post subject: | |
deleted |
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| Author: | Irishcream [ Sun May 14, 2006 4:46 pm ] |
| Post subject: | |
Quote: "External Channel Change Command:" is the field just above the preset channel one. You need something in there for the preset to get used, even if it's just a dummy. For testing you can use /bin/true. Normally that would be the name of the script that drives the IR blaster or serial connection, or firewire connection , or ... whatever you use to change the channel on the cable box.
So maybe i havent explained this correctly. The external channel changer works flawlessly (thanks dct-channel!) but the tuner needs to go to channel 3 first. So, once i put it to channel 3 using xawtv, all is well. |
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| Author: | tjc [ Sun May 14, 2006 8:21 pm ] |
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Does you channel change script have an "exit 0" at the bottom or a command that completes successfully to provide a "good" exit code? Do you have the "Input Connection" set up for the "tuner" input and only that? |
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| Author: | Irishcream [ Sun May 14, 2006 8:26 pm ] |
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well you could be on to something here. mythtv was locking up during channel changing until i told the dct-channel to just change the channel and not wait for feedback from the digital box. i checked the output while this was happening, and basically dct-channel attempted to change the channel 5 times, waiting several seconds in between, but never got the information that it had changed. However, the first try dct-channel made was successful, it just never realized. So does the new version of mythtv require a code to be set after a successful change? |
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| Author: | tjc [ Sun May 14, 2006 8:48 pm ] |
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As far as I'm aware it has always cared about the exit code. That is the normal way a parent process in Unix knows if the child process thought it was successful. If the tuning script returns a non-zero exit code, mythtv thinks it failed. |
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| Author: | Irishcream [ Sun May 14, 2006 8:59 pm ] |
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well then that is a fantastic point. ill broswe through the script and find out what's wrong, or hardwire the return value in. i'll let you know thanks edit... so i just quickly browsed through the code. It seems that using the blind mode should return 0 regardless of what happens. So, this should be ok. |
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| Author: | Irishcream [ Sun May 14, 2006 9:04 pm ] |
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this is included in main() if (blind) { blind_channel(chan); if (!quiet) printf("%d\n",chan); return 0; } blind_channel(int) returns a void so regardless, this should terminate successfully |
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| Author: | mjl [ Sun May 14, 2006 9:12 pm ] |
| Post subject: | |
Hi, Just as a thought, do you have a channel 3 in your channel setup? mythtv-setup Edit Channels. It won't change to a channel that doesn't exist, even if you have it as preset. Mike |
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| Author: | Irishcream [ Sun May 14, 2006 10:33 pm ] |
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so i guess that brings up another interesting point. if i run mythtv-setup and go to the input screen, i can scan for channels (and it finds that only channel 3 has a signal). so I guess mythtv has the ability to change the channel of this card, it just doesnt do so.... is there a command line that i could use to manually set this card to channel 3 at startup? that's the easiest workaround i can think of... |
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| Author: | nickread [ Sun May 14, 2006 10:40 pm ] |
| Post subject: | |
ivtvctl |
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| Author: | Irishcream [ Sun May 14, 2006 10:59 pm ] |
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well i'd just like to say BOOYAH! and thanks for everyone's help this seems to work wonders right here.... Code: v4lctl -c /dev/video1 setchannel 3 i'll stick it into /home/mythtv/.fluxbox/apps Code: [startup] {/usr/sbin/alsactl restore}
[startup] {/usr/bin/v4lctl -c /dev/video1 setchannel 3} [startup] {xset -dpms s off} [startup] {KnoppMyth-run} [startup] {launch_irx.sh} [app] (SDL_App) [Layer] {2} [Deco] {NONE} [end] |
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