[mythtv-users] Jerky live TV

[Graham Wheeler]

Thanks Jarod; I did try this (dropping the setting to 7Gb); so far it
seems okay. I'll leave it running till the morning to make sure. When I
cleaned out the directory I noticed it had two files, but it currently
has one. Is it normal for there to be two files or could that have been
the problem (in which case I may be able to set it back to 8Gb)?

Video is still jerky, unfortunately. CPU is pegged at 100%, so I guess
that is the issue. I got the impression from my research (browsing the
database of user reports) before embarking on this project that the box
and card I'm using would have ample horsepower to do the job, but it
seems not. I may have to give up on the AVerMedia card and buy a
Hauppage PVR card which is a bummer, unless there is some other
explanation.


-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Jarod C. Wilson
Sent: Wednesday, December 24, 2003 11:57 PM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Jerky live TV

On Dec 24, 2003, at 23:32, Graham Wheeler wrote:

> The recording directory is set to /myth which is only 1% used. The
file
> system that is full is the ring buffer, which is set to be 8Gb in the
> settings. I would expect that to always be at 100% use (unless there
is
> some glitch which means that even though KnoppMyth made it 8Gb and set
> the size in the config to be 8Gb I need to set the size in the config 
> to
> be less than that).
>
> Your comments are unhelpful (as well as snide).

He might have been a touch off, but the "no space left on device" and 
100% usage of /cache is indeed your problem. That isn't your recording 
directory, it is your live TV buffer directory, and the problems are 
happening with live TV. I believe you've either got a stray file that 
got left there, or (like you seem to be thinking might be the case) you 
set your buffer size prefs slightly larger than what the actual 
capacity of that partition is (8GB doesn't always equal 8GB, because of 
rounding -- you may be off by just a few MB, who knows). MythTV is 
expecting more space to keep writing its live TV buffer, and the space 
isn't available. I'd try backing your buffer size setting down to 7GB, 
and "rm -rf /cache/*".

--jarod


>> Actually things are a lot worse than I thought -
>> not only is the live TV jerky, but MythTV freezes up entirely
>> after a  >while (could be seconds, or minutes, the time varies).
>>
>> Looking in the logs I see:
>>
>> ERROR: file I/O problem in safe_write()
>> No space left on device
>
> Actually you should have read the error message and...
>
>> /dev/hda3 Mounted /cache Size 8Gb Used 100%
>
> ...figured out that this filesystem is full, which is where
> you have set MythTV to record to.
>
> Please go over your settings, and change the recording directory.
> And read the documentation: http://www.mythtv.org/docs

-- 
Jarod C. Wilson, RHCE

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