[mythtv-users] Video lasts for only 1 second on live TV

Allan McIntosh amcintosh at atreus-systems.com
Wed Oct 12 15:38:00 UTC 2005


> So just as a follow up you did restart the mythbackend service after 
> the backend came up.  The service not the machine.
>
> For I had to add a sleep command after loading ivtv before I started 
> the backend.  Obviously a hack but a good one :)
>

I stopped my init script from even running.
`chkconfig --del mythbackend` same as `rm -f /etc/rc?.d/*mythbackend`

At the moment I have to manually start the backend upon start up 
otherwise I get buffer prepause.

I may have time further investigate this later tonight once I am 
finished working. I found last night when the machine near the TV that 
is a backend/frontend combo(1.4G Athlon) was recording/running 
comflag/and playing back a "perfect rip" dvd when I tried to watch a 
recording on a remote frontend and it was seriously choppy to say the least:

2005-10-11 21:26:33.607 Realtime priority would require SUID as root.
2005-10-11 21:26:33.768 Video timing method: RTC
2005-10-11 21:26:42.602 prebuffering pause
2005-10-11 21:26:47.556 prebuffering pause
2005-10-11 21:26:49.321 prebuffering pause
2005-10-11 21:26:51.372 prebuffering pause
2005-10-11 21:26:53.660 prebuffering pause
2005-10-11 21:26:55.651 prebuffering pause
2005-10-11 21:26:59.098 prebuffering pause
2005-10-11 21:27:01.063 prebuffering pause
2005-10-11 21:27:03.293 prebuffering pause
2005-10-11 21:27:07.150 prebuffering pause
2005-10-11 21:27:09.246 prebuffering pause
2005-10-11 21:27:10.958 prebuffering pause
2005-10-11 21:27:12.613 prebuffering pause
2005-10-11 21:27:15.846 prebuffering pause
2005-10-11 21:27:19.326 prebuffering pause
2005-10-11 21:27:22.446 prebuffering pause
2005-10-11 21:27:24.367 prebuffering pause
2005-10-11 21:27:25.908 prebuffering pause
2005-10-11 21:27:29.200 prebuffering pause
2005-10-11 21:27:31.175 prebuffering pause
2005-10-11 21:27:33.311 prebuffering pause
2005-10-11 21:27:38.243 prebuffering pause
2005-10-11 21:27:39.610 prebuffering pause
2005-10-11 21:27:41.937 prebuffering pause









> -Phil
>
> On 10/11/05, *Allan Mcintosh* <amcintosh at atreus-systems.com 
> <mailto:amcintosh at atreus-systems.com>> wrote:
>
>
>     I was seeing buffer prepause when attempting live tv playback. It
>     would
>     pause if mythbackend was started using
>     /etc/init.d/mythbackend init script. It looks as though there's an
>     issue
>     when started via 'su' .
>
>     so I created an alias in ~/.bashrc
>
>
>     alias mythbackend='mythbackend -v channel,record,playback --daemon
>     --logfile /var/log/mythtv/mythbackend.log --pidfile
>     /var/log/mythtv/mythbackend.pid'
>
>     Then start as mythuser.
>
>
>     The buffer prepause occured if I ran the init script as root or
>     myth user.
>
>



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