Mailing List Archive

Any card that you use will work with the commercial
skip. It is actually the software that detects them.
You have to give it time after your done recording so
it can get through the processing. It actually does
it by looking for the blank frames between
commercials.


--- Paul Miller <paul@pinheiro.dyndns.org> wrote:

> Is it possible to skip recording of commercials?
> I'm interested in
> purchasing a PVR-250/350; is this device capable?
>
> How do devices that support this feature detect
> commercials? I wonder
> if it has something to do with the rating system --
> I think I noticed
> my Radeon 9700 AIW (in Windows) display the rating
> before and after
> commercials. It's been a long time since I've used
> it though.
>
> Thanks!
> -Paul
> > _______________________________________________
> mythtv-users mailing list
> mythtv-users@mythtv.org
>
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>




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>Is it possible to skip recording of commercials? I'm interested in
>purchasing a PVR-250/350; is this device capable?
>
>How do devices that support this feature detect commercials? I wonder
>if it has something to do with the rating system -- I think I noticed
>my Radeon 9700 AIW (in Windows) display the rating before and after
>commercials. It's been a long time since I've used it though.

The commercial detection algorithms are built into MythTV not the capture
card. When the program has finished recording I believe a program runs over
it which flags the commercials. This is based on things like detecting blank
frames, scene changes and stuff like that. It's not based on displaying the
rating.

Then when you watch it it either pops up a commercial detected message on
screen or skips it automatically, depending on your preferences. In
Australia a few of us have been having problems with the accuracy of the
commercial detection so I don't have auto-skip set.

On Mon, 2004-12-13 at 20:29, Phill Edwards wrote:
> >Is it possible to skip recording of commercials? I'm interested in
> >purchasing a PVR-250/350; is this device capable?
> >
> >How do devices that support this feature detect commercials? I wonder
> >if it has something to do with the rating system -- I think I noticed
> >my Radeon 9700 AIW (in Windows) display the rating before and after
> >commercials. It's been a long time since I've used it though.
>
> The commercial detection algorithms are built into MythTV not the capture
> card. When the program has finished recording I believe a program runs over
> it which flags the commercials. This is based on things like detecting blank
> frames, scene changes and stuff like that. It's not based on displaying the
> rating.
>
> Then when you watch it it either pops up a commercial detected message on
> screen or skips it automatically, depending on your preferences. In
> Australia a few of us have been having problems with the accuracy of the
> commercial detection so I don't have auto-skip set.

The accuracy of commerical detection can very wildly from channel to
channel and show to show. I find it usually works very well on sporting
events which tend not to have a lot of scene changes and dark lighting,
when watching sports i'll usually go into the on-screen menu during
playback and set it to auto-skip (which just sets it for the current
viewing). Something like Law & Order I usually have to jump back a few
seconds as it usually picks up one of the black screens with the "Trial
Part nn" and the tung-tung sound as the end of the commercials.

Also if you're having some bad weather it will mess it up. When the
network affiliates put up the advisory maps they're on the screen
constantly, so there's never a completely black frame.

--
James Orr <james@orrwhat.net>

On Tuesday 14 December 2004 13:21, James Orr wrote:
> The accuracy of commerical detection can very wildly from channel to
> channel and show to show.  I find it usually works very well on sporting
> events which tend not to have a lot of scene changes and dark lighting,

Speaking of dark lighting...
I've notices that while watching live tv, very dark scenes cause
slight stuttering of audio. As soon as the scene brightens up this
stops.

What causes that, and is there any way to correct it?
This happens on an otherwise not busy machine with a pvr-350.

--
______Jsa_________

On 12/14/2004 05:37 PM, John Andersen wrote:

>On Tuesday 14 December 2004 13:21, James Orr wrote:
>
>
>>The accuracy of commerical detection can very wildly from channel to
>>channel and show to show. I find it usually works very well on sporting
>>events which tend not to have a lot of scene changes and dark lighting,
>>
>>
>Speaking of dark lighting...
>I've notices that while watching live tv, very dark scenes cause
>slight stuttering of audio. As soon as the scene brightens up this
>stops.
>
>What causes that, and is there any way to correct it?
>This happens on an otherwise not busy machine with a pvr-350.
>
>
>
Extra audio buffering

Enable this setting if MythTV is playing "crackly" audio and you are
using hardware encoding. This setting will have no effect on MPEG-4 or
RTJPEG video. MythTV will keep extra audio data in its internal buffers
to workaround this bug.

Mike
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