[mythtv-users] transcode/mythtranscode memory leak or buffering?

[Henrik Bentel]

I'm running 0.13 release on Fedora (Atrpms). I did experiment with shutting 
down other processes that wasn't critical (samba, webserver, usb 
daemons,  etc ).
Memory usage still creeped up and up
But when I killed the mythtranscode process and deleted the recording( at 
the time it was the only recording letf to transcode), memory stopped 
getting eaten.
So I thought I had found the guilty process.

-Henrik


> > -----Original Message-----
> > From: mythtv-users-bounces at mythtv.org
> > [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Henrik Bentel
> > Sent: Wednesday, 21 January 2004 3:50 PM
> > To: mythtv-users at mythtv.org
> > Subject: [mythtv-users] transcode/mythtranscode memory leak
> > or buffering?
> >
> >
> > Hi
> >
> > When transcoding from MPEG-2 to MPEG-4 I'm seeing memory then
> > swap usage go
> > up and up and up. but never down.
> > It's a regular slow mem. usage creep (couple of megs a few
> > minutes apart).
> >
> > I searched the mailing list and somewhere someone said it was
> > transcode
> > doing buffering, not leaking.
> >
> > My problem is that I have a recording that's a bit over 4
> > gigs. And even
> > after reboot (with several services turned off to save memory) the
> > transcode will not complete
> > before memory and swap runs out. I have 512 MB mem which
> > apparently isn't
> > enough. I have logs saying outofmemory and database not
> > accessible and all
> > kinds of errors all over the place. Then the machine reboots. Then on
> > startup it automatically starts transcoding again, which
> > again eventually
> > fails, and the whole thing repeats. My workaround was to
> > delete my 4 gig
> > recording. not cool.
> >
> > Is this expected buffer strategy?
> > Has anyone else seen this problem??
> >
>
>Doesn't sound right to me. I regularly transcode nearly every recording
>I make from DVB MPEG2 down to MPEG4. I have easily done recordings as
>big as 10GB. This is on a machine with 512MB of memory. I don't even
>have any swap space turned on since I find I'm only using around 200MB
>in normal operation. The rest becomes disk cache. I have never noticed
>memory usage get out of hand but then again, I haven't really bothered
>to look.
>
>Can you see the mythtranscode process actually using the memory (in
>'top' for example)? Possibly it's something else using it.
>
>BTW: I usually run with a week or two of CVS. You don't mention which
>version you use.
>
>If you want to top an automatic transcoding while it's in progress, I
>have found the easiest way is to view the recording and change it's
>cutlist. Mythtranscode will detect the cutlist change and abort. YMMV.
>
>CH
>
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