[mythtv] frontend hangs when fast-forwarding across a commercial boundary

[Derek Atkins]

Bruce Markey <bjm at lvcm.com> writes:

> Derek Atkins wrote:
> > I was watching a recording using current CVS.
> 
> How current? If your last checkout was before Sunday, this may
> have been fixed. If this just started today then it may be a
> newly introduced bug.

Code checkout as of yesterday.  I dont know when it started, I
only got the system up and running in the last four days.

> > ...I've got commerical autoskip turned on.
> 
> Does this only happen when commercial autoskip is turned on or
> does it also happen when this is turned off?

Honestly, I dont know..  I _thought_ I tested it with autoskip off and
it continued to occur, but I'm not 100% sure I successfully turned off
autoskip.  The good news is that I do have a fairly reliable test
case.

> > I was fast forwarding through, trying to find the
> > actual beginning and end of the show (to try to adjust my record
> > times), when it hung.  It's hung a few times like this..  The only way
> > to recover is apparantly to restart the frontend (the backend is
> > fine).  When it's hung, all I see is a black screen.
> 
> The backtrace show it was in DoRewind(). Is it possible that
> you might have been rewinding at the time of this backtrace?

Oh, indeed I was.. I was rewinding across a commercial break.  One
time I was fast-forwarding across it, but I do believe it happens more
reliabily while rewinding.

> I haven't been able to reproduce this with commercial autoskip
> on or off, sticky keys on or off, forward or rewind. Does this
> happen on every recording you have or just on certain files?

I've only tested with one file.  I'll happily send the file, but it's
rather large (4GB).

> Did you use test_ioctl to change any audio params? Is the last
> message on the console "Audio has changed:"? Could you please
> run "mythfrontend -v playback" to see if there are any other
> warning messages before it hangs?

No, I didn't change the audio params (or anything else).  But yea, the
last message on the console is "Audio has changed:":

Input #0, mpeg, from '/var/mythtv/video/1011_20030917210000_20030917220000.nuv':
  Stream #0.0: Video: mpeg2video, 720x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Audio has changed: 11025hz mono
Audio has changed: 48000hz stereo
Audio has changed: 11025hz mono
Audio has changed: 48000hz stereo
Audio has changed: 8000hz mono
Audio has changed: 48000hz stereo
Myth Frontend ended at Tue Sep 23 12:33:50 EDT 2003

I can re-run (later) with -v if you'd like more input, unless this is
sufficient.

-derek

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available