[mythtv-users] commercials

[norman]

On Sun, 2007-07-08 at 10:28 -0600, Brian Wood wrote:
> norman wrote:
> > < snip>
> >>> Was it a DVB broadcast? Was the problem with the sound that it was out
> >>> of sync? If so, try editing the commercials out with ProjectX as
> >>> that's about the only program which will ensure audio/video sync after
> >>> editing.
> >> Good point. I had just assumed the "problem" was something more drastic
> >> than out-of-sync, and we all know what "assume" means.
> >>
> >> I agree that anybody doing any editing should have projectX around but,
> >> being a a java app, it takes a fairly decent box to run it well, and
> >> it's probably best to run it on separate machine from your Myth box,
> >> unless the Myth box is very fast.
> > 
> > Thanks for the replies. Perhaps I should give more information. I am in
> > the UK and I do all the editing and burning using the facilities
> > available within Mythtv. I have never had trouble with audio/video synch
> > and only once, so far, had a problem with audio. What happened was that
> > about half way through playing the DVD the audio signal disappeared and
> > did not return. It had been suggested that this could have been caused
> > by multiple audio signals, what ever that maybe, that could have
> > affected the processing prior to the burning stage, hence my interest in
> > how Mythtv detects when commercials start and finish. As far as I could
> > tell, the sound disappeared about 100 secs before the start of a batch
> > of commercials.
> 
> It's generally a process of elimination.
> 
> First: Are you absolutely positive the problem was in fact on the DVD,
> and not some sort of playback problem? Was it totally repeatable? Did it
> happen on multiple players?
> 
> If it was a problem on the DVD, was it repeatable? If you burned another
> one did you have the same problem?

There was no problem when the original recording was played either
before or after marking the starts and endings of the commercials, using
my computer for playback. I burned it 3 times and the problem was there
each time. Yes, it happened on two different players.

> Of course, if you removed the spots from the file you may not be able to
> go back to the original.
> 
> Often trying to track down this sort of thing is futile, but you did
> what I would do, check the list to see if anyone else had had similar
> problems.

Interestingly, I edited the recording using Avidemux and, apart from
some occasional audio/video out-of-synch, there was no sound loss on the
DVD produced. Perhaps I must just put it down to experience.

Norman