[mythtv-users] Important recoding damaged - anything I can do?

[Nick Rout]

On Thu, Jun 28, 2012 at 6:19 PM, Damian <myth at surr.co.uk> wrote:
> Hello all,
>
> My kids were on a BBC1 TV program about Glastonbury festival a couple of
> years ago. The recoding has survived various Myth problems and re-installs,
> but I now fear that I've lost it for good.
>
> I have tried and failed to 'export' this file into a more usable format
> several times over the years I have had it. Exporting a recording from
> MythTV seems to be one of the hardest things to do for some reason, but I'm
> not here to complain. Just want to see if there's anything I can do from
> here.
>
> I got the impression from a recent thread that creating a cut list and
> trascoding a recording with 'lossless' quality would create an MPG file (as
> opposed to an nuv). I did that a few days ago. The job seemed to take a very
> long time, but I was happy to see that it was no longer in the job queue the
> following morning.
>
> Running mythlink.pl showed me that the file was still an nuv file.
>
> Last night, I thought I'd try it again, but found a problem. The recording
> is still there from within MythTV, but only partially. If I play the
> recording, it just closes after about 15 minutes. I obviously tried this
> several times and have also tried playing the file using VLC from a Windows
> machine. The file seems to be damaged.
>
> I doubt there's anything that I can do, but would love to hear if any
> recovery is possible.

I assume you don't have the original file from before you did the
transcode to nuv?

Anyway have you tried something like

ffmpeg -i damagedfile.nuv -vcodec copy -acodec copy newfile.nuv

?