[mythtv-users] 0 byte recordings with HD-PVR and Myth 0.28 on Ubuntu 14.04.2

[Karl Newman]

On Tue, May 12, 2015 at 5:30 PM, Fred Hamilton <fred at yonkitime.com> wrote:

> My HD-PVR was working reliably (except for an occasional small encoding
> glitch) for the last year or so until a few weeks ago, when I started
> getting occasional and then consistent 0 byte recordings.  I tried various
> power cycling and rebooting combinations and finally it came up working
> consistently for about a week.  Then I got a new HD-PVR (in the hopes it
> would fix the encding glitch), so I powered down the system and installed
> it.
>
> Since then I have had nothing but 0 byte recordings.  With the old HD-PVR,
> with the new one, in different USB ports, cycling power with HD-PVR on
> first, then Myth box on first, etc.  Always 0 byte recordings.
>
> However "cat /dev/video0 > temp.ts" always works (if it's run before
> MythBackend tries to record something.  After Mythbackend tries and fails,
> "cat /dev/video0 > temp.ts" starts producing zero byte recordings as well.
> So it seems like the hardware and driver are OK until mythbackend tries to
> use it.
>
> Any suggestions for what to try next?  Surprisingly nothing shows up in
> the myth log files (except for commercial detection, preview image,
> metadata, etc. failing).  The first time mythbackend.log updates is when I
> kill the recording 5 minutes after it starts, and there's nothing about the
> video failing that I can see.  Are there log files for dev/video1 somewhere?
>
> Any help/suggestions appreciated!
>
> When you tried the new unit, did you use its power supply or did you
continue to use the old one? I believe that is the most common failure
point for these devices.

Karl
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