[mythtv-users] Specific steps to nuvexport (DivX format) and systemlockups

[Joseph A. Caputo]

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org]On Behalf Of Timothy Weaver
> Sent: Wednesday, September 24, 2003 9:59 AM
> To: mythtv-users at mythtv.org
> Subject: [mythtv-users] Specific steps to nuvexport (DivX format) and
> systemlockups
>
>
>
>
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> I am still experiencing a consistent lockup of the system when ffmpeg is
> running. This happens against different files and I know others were also
> experiencing this problem. I also know that some people resolved the
> problem by downgrading to ffmpeg-0.4.6, which I have also tried with no
> success. I still get the lockups.
>
> So here is the configuration and procedure that I am using:
>
> 1) MythTV (CVS as of 23rd September) is setup and able to successfully
> record using my PVR-250 card. The resulting .nuv files are in the native
> MPEG-2 format that the PVR-250 encodes to. I do NOT have the Autotranscode
> option enabled.
>
> 2) I run nuvexport (updated 23rd September) and go through the options,
> using only the default options for the DivX format.
>
> 3) nuvexport kicks off the mythtranscode process and then, somewhat in
> parallel while mythtranscode is still running (I see it in top/ps -x),
> ffmpeg is started.
>
> 4) ffmpeg runs for varying amounts of time and shows the counter
> increasing
> the frames, seconds etc.
>
> At some point, the system locks up completely and then reboots itself (I
> have the machine, which is remote, set to reboot itself after a kernel
> panic). Nothing shows up in the system logs giving any indication of the
> problem
>
> Am I crazy here and the last one experiencing the problem? Or am I missing
> something? This is my last step to complete my remote use of the box, so
> any tips or solution would be greatly appreciated.


I don't recall anyone experiencing this problem... a bunch of people had
problems with ffmpeg 'stalling' (it never got past video frame #3), and that
problem seems to have been resolved by downgrading to ffmpeg-0.4.6, but I
don't recall anyone else having a full machine lockup (reboot??!!).  You may
be having heat problems.

Also, why are you using nuvexport if you have a PVR-250?  Files recorded by
a PVR-250 are standard MPEG-2; you could transcode them to DivX with a
single mencoder or transcode command line.  nuvexport is mostly useful for
transcoding the Myth NuppelVideo format recordings that are ordinarily not
playable with anything else; it uses mythtranscode to 'play' the raw video
into a FIFO, which is read as raw audio & video data by ffmpeg.

If your goal is simply to be able to watch your recordings in Windows, then
you could just copy the .nuv files recorded by your PVR-250 over to your
Windows box and rename them to .mpg.  If you want to archive them in DivX to
save space, you can use mencoder, transcode, ffmpeg (but NOT through
nuvexport) or any number of Windows programs.

-JAC