Is there a way to fix a DVD+R recording mistake onto another disc?

[rafazap at dslextreme.com]

On Sun, Apr 11, 2010 at 9:55 PM, Gus Wirth <gwirth79 at gmail.com> wrote:

> On 04/11/2010 09:49 PM, rafazap @dslextreme.com wrote:
> [snip]
> > I only see 4 big files here, but I know for a fact that there are 6
> titles
> > on this disc, 40 minutes each (in EP mode). This listing makes no sense
> to
> > me. Using myth to view the DVD, I see all 6 titles. The titles must not
> be
> > stored in individual files. It looks like all the titles are stored in
> one
> > big file and it is chopped into a second file when it reaches 1G.
> Swapping
> > the title by swapping the file appears to be a dead end. It looks like if
> > there is a way to do it, I'm going to have to figure out how to do it in
> > myth. It has options to import DVD and video. I'll have to play with
> that,
> > or maybe just leave it as is.
>
> Can you explain why you don't transcode your recordings in MythTV and
> burn the files to a DVD directly?
>
> Gus
>

Yes, I can explain that.
#1, I don't know how. I would like to do it that way, but haven't gotten
that far.
#2, I've done the transcoding part and they end up just as big as the
original recording, too big for even one 1-hour show to fit onto a single
DVD, regardless of what I have selected in recording quality or transcoding
quality. In fact, the various quality selections seem to make no difference
at all.
#3, Even editing out the commercials, the size of the recording does not
shrink. It seems that "editing out the commercials" does nothing more than
to put markers that myth uses to skip over during each playback.
#4, Even transcoding the file after marking the commercials has no effect in
shrinking the files. In fact, IIRC, it makes them even bigger.
#5, The ones that I transcoded, I was not able to figure out how to undo it.
Even though I scoured the options and found the one that keeps the original
file, the transcoding process takes the original file out of the listings.
Removing the transcoded file does not help that.
#6, Each file, transcoded or not, flagged for commercials or not, takes at
least 7G per hour.
#7, Seeing that even a one-hour program wouldn't fit on a single DVD,
regardless of what I did to it in myth, I didn't bother trying to figure out
how to put them onto DVD from myth.