[mythtv-users] Long delays with remote occasionally

[lj]

On Fri, 2009-03-27 at 13:14 -0700, Josh Mastronarde wrote:
> 2009/3/27 Allen Edwards <allen.p.edwards at gmail.com>:
> >
> >
> > On Fri, Mar 27, 2009 at 9:54 AM, Josh Mastronarde <jmastron at gmail.com>
> > wrote:
> >>
> >> On Fri, Mar 27, 2009 at 8:24 AM, Richard Shaw <hobbes1069 at gmail.com>
> >> wrote:
> >> > 2009/3/27 Allen Edwards <allen.p.edwards at gmail.com>:
> >> >> Has anyone made progress on this remote/ keyboard delay-lag problem?
> >> >>  It may
> >> >> be my imagination but it is happening several times per program lately.
> >> >>  It
> >> >> is very irritating.  It is particurally bad on American Idol where I am
> >> >> skipping a commercial 30 seconds at a time and the program is still
> >> >> being
> >> >> recorded while I am watching.  I have also seen it when navigating the
> >> >> recorded programs menu.
> >> >> Can anyone help?
> >> >> Allen
> >> >
> >> > I've had very little time to trouble shoot it but in my situation it
> >> > mostly seems to happen on certain recordings. I have a Athlon X2
> >> > 2.7GHz (Kuma AM2+ CPU) w/ 2GB memory (1066MHz) and 8400GS running
> >> > 0.21-fixes (no additional patches) and Using Slim profile.
> >> >
> >> > Regular HD content works fine, frontend stays relatively responsive. X
> >> > eats 7-14% CPU on top and mythfrontend runs 40-80%.
> >> >
> >> > SD content that has been scaled up to HD seems to cause me grief. CPU
> >> > wise the tables are turned and X eats 85-97% CPU on one core and
> >> > mythfrontend is eating 7-14%. But even though only one core is maxed
> >> > out and the other is not the remote (and keyboard) will not respond
> >> > for up to 30 seconds (rarely more) but will stay responsive for a
> >> > short duration (as long as I continue to press buttons).
> >> >
> >> > Richard
> >>
> >> For me, I had apparently 2 different causes, at different times:
> >>
> >> 1)  When I had only PVR150 mpeg2 content, I had to add:
> >>
> >>        Option      "UseEvents" "True"
> >>
> >> to /etc/X11/xorg.conf for my Nvidia 6200 card.  That made it go away
> >> the first time.
> >>
> >> 2)  Now that I have mixed PVR150 and HDHomerun recordings, the problem
> >> came back along with some other problems, like the files not always
> >> playing.  I root caused those to an issue with the file type detection
> >> in the FFMPEG library that's part of Myth -- mpeg TS vs mpeg PS --
> >> appeared to sometimes play with the wrong decoder, but not quite
> >> right.  Once I patched to fix that, the remote lag hasn't reappeared
> >> either.  As soon as I get a chance, I'm going to file a ticket to see
> >> if my patch can get put in 0.21-fixes (trunk seems to have already
> >> synced with the latest ffmpeg library with the better probe
> >> procedure).  If you compile yourself and want to try what I did, email
> >> me and I'll send you the patch file.  It's a fix to the "mpegps_probe"
> >> procedure in libs/libavformat/mpeg.c
> >>
> >> Josh
> >> _______________________________________________
> >> mythtv-users mailing list
> >> mythtv-users at mythtv.org
> >> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
> > Thanks for the update.  I have UseEvents True in my setup so that isn't it.
> >  The other solution is of interest but I don't compile my own.  I  have 8.04
> > LTS with fixes.  I hate to change things because it always breaks stuff.
> >  However, I would like to get this problem fixed.  Is there a way to do some
> > limited patch of some files and install  your fix?  If not, I would be very
> > interested to know when it is in the fixes as that would definitely be worth
> > taking the chance on updating the system.  Without a fix to this problem, I
> > am sticking with the "if it ain't broke don't fix it" philosophy.
> > Allen
> >
> 
> To see if this even might be the issue, try:
> 
> 1)  mythfrontend -v important,libav > log
> 2)  View an HDHomerun recording
> 3)  grep "Input #" log
> 
> For a PVR-150 recording, I get:
>   2009-03-27 12:57:06.708 Input #0, mpeg, from '/video/1003_20090326220000.mpg':
> 
> But for an HDHomerun recording, I now get (post-fix):
>   2009-03-27 12:56:41.795 Input #0, mpegts, from
> '/video/2031_20090326213100.mpg':
> 
> Note the "mpeg" vs "mpegts".  What do you get (report all matching
> lines; it appears to re-probe in some instances, which may be what
> leaves things hanging and causing lirc delays).
> 
> Josh
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

Hi Josh and list,

I tried 1)  mythfrontend -v important,libav > log   and followed up by
viewing an HD ATSC recording during which I experienced one remote ir
button press delay.   The recording was made using one of my ATSC tuner
cards.  Here's the output of 3)  grep "Input #" log on the HD recording:

2009-03-29 10:20:17.845 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:20:19.380 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:20:22.576 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1131_20090329070000.mpg':
2009-03-29 10:20:23.334 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1081_20090329070000.mpg':
2009-03-29 10:20:26.159 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1081_20090328220000.mpg':
2009-03-29 10:20:28.240 Input #0, mpegts, from
'myth://192.168.1.106:6543/1111_20090328040000.mpg':
2009-03-29 10:20:28.662 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1131_20090327223500.mpg':
2009-03-29 10:20:29.412 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1131_20090327223500.mpg':
2009-03-29 10:22:01.574 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1131_20090327223500.mpg':
2009-03-29 10:22:02.130 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1131_20090327223500.mpg':
2009-03-29 10:22:03.123 Input #0, mpegts, from
'/var/lib/mythtv/recordings/1131_20090327223500.mpg':

When I watch a recording made using my s-video input to the WinTV
HVR-1600 mpeg encoder,  3)  grep "Input #" log  shows:
2009-03-29 10:34:43.701 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:34:44.809 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:34:49.903 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:36:41.766 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:36:42.303 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':
2009-03-29 10:36:43.332 Input #0, mpeg, from
'/var/lib/mythtv/recordings/2182_20090329070000.mpg':

Interestingly during this last recording,  I also experienced the ir
remote button press delay buildup and unwind.

Hope this helps unravel this mess.  With this bug,  mythtv for me is
severely degraded.

Larry