[mythtv-users] Skipping Issues

[Jon Heizer]

Jon Heizer wrote:
> Hey all,
>
> I have been having an issue since I rebuilt my myth machines a few 
> weeks ago.  When ever I go to skip forward when watching a recording 
> it will work fine until I have passed about the 30 minute mark or so.  
> After that skipping 30 sec or 10min will result in the video moving 
> forward a sec or two, but the time showing it has moved the correct 
> amount.
>
> I am running knoppmyth R5.5 on my FE and MBE.  On my laptop I 
> installed ubuntu repository's mythfrontend and was able to skip ok.  
> Since it was a more recent version I just compiled .21fixes as of a 
> few hours ago on my backend and frontend and am still having the issue.
>
> The seek table seems to have ~7k entries/hour/recording.  I have run 
> DB checks and optimize_mythdb and both come back clean.
> When I did the reinstall, my hardware and setup changes were as follows:
>    My main frontend is a completely new machine (X2 5600+ 2GB Ram)
>    The master backend is the old frontend hardware (Athlon XP 2000+ 
> 1.5GB Ram)
>    DB has been moved out of the MBE and on to a separate machine
> All machines are connected via GBit wired lan.
>
> At first I thought moving the DB was part of the cause of my issues so 
> I have turned off things like starting commflag when a recording 
> starts, but it is still happening.  It happens to SD, HD, before the 
> hardware change and afterwards.  Basically anything that is over 30 
> minutes long is effected.
>
> root at mythtvlivingroom:~# uname -a
> Linux mythtvlivingroom 2.6.23-chw-4 #1 SMP PREEMPT Mon May 26 14:44:56 
> PDT 2008 i686 GNU/Linux
>
> root at mythtvlivingroom:~# mythfrontend --version
> Please include all output in bug reports.
> MythTV Version   : 18318
> MythTV Branch    : branches/release-0-21-fixes
> Library API      : 0.21.20080304-1
> Network Protocol : 40
> Options compiled in:
> linux release using_oss using_alsa using_arts using_jack using_backend 
> using_dbox2 using_directfb using_dvb using_firewire using_frontend 
> using_hdhomerun using_iptv using_ivtv using_joystick_menu using_lirc 
> using_opengl_vsync using_opengl_video using_v4l using_x11 using_xrandr 
> using_xv using_xvmc using_xvmcw using_xvmc_vld using_bindings_perl 
> using_bindings_python using_opengl using_ffmpeg_threads 
> using_libavc_5_3 using_live
>
>
> I have tried to dump my brain here but I am sure I am forgetting 
> things this late so feel free to pry more.  Thanks for any help you 
> can provide.  Not being able to watch anything over 30 minutes is 
> becoming a pain.  Off to bed to fight another day.
>
> Jon
>
    I finally think I have it figured out for those of you that may have 
the same issue now or in the future.  I was sitting here trying to 
figure out what else was different between the two frontends and only 
thing I could come up with was mounts and playback options.  I decided 
to tell the frontend to stream all recordings from the backend and 
everything work great now.  I have a /myth directory mounted smb since I 
now have 4 storage groups and other mount points and links for videos 
and music.  Before this upgrade I had an LVM and used nfs.  So I guess I 
have an issue with my smb setup that I am going to have to figure out 
still.  The frontend has a single tuner that I have yet to configure, 
but guessing I am going to have problems with it now also.  Gotta love 
computers some days.

Jon