[mythtv-users] Sound Syncronization Problems in Recording Playback ONLY

Douglas Wagner douglasw0 at gmail.com
Tue Jun 27 21:15:16 UTC 2006


All, i'm opening this thread back up, over the next week i'll look at all of
these interesting ideas and see what I can come up with.

Interestingly enough one more thing to note on this thread:

I just installed WinMYTH on one of my PCs downstairs, figured i'd give it a
shot and see what happens with it.

So I install it and sure enough I connect to my Myth box upstiars.  Get the
list of videos to be able to play and figure "what the hell."

Load up a taped Grey's Anatomy episode that i'm keeping around for sound
sync testing.  Not a sound.  Video plays just fine but sound?  Not a single
peep.

Load up a copy of any of the kids shows (sound in sync upstairs).  Perfect
sound, perfectly synced up.

W....T.....F?  This is sure starting to sound like an extreme difference in
the way the physical sound comes through to the recording as with stuff that
is out of sync I simply get no sound at all where as stuff that is in sync I
get perfect sound.

One more test i've not done.  Taken an out of sync show and copied it into
my myth video area to play as a myth video (i'm now using Xine as my video
player).  I'll have to do that.  As I stated before if I drop out of MythTV
and play the file on Xine it syncs up perfectly, we'll see if playing on
xine in myth tv is good or bad.

And to answer one of the questions above: No,  i've not yet posted on the
Dev list, I want to make sure i'm not bothering them for no good reason. :)

BTW I can somewhat rule out an HD/SD issue as I taped both Toy Story 2 and
Ants over the last few weeks and playing them through MythVideo comes across
with no problems (tho that might just mean that the test I talked about
above will work).  I KNOW both of those movies were sent down stream in HD
format.

More info in a short little while.

--Douglas Wagner

On 5/30/06, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
>
> On 5/30/06, Steve Skarda <steveskarda at gmail.com> wrote:
> > On 5/30/06, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> > > When you do your testing, try recording something straight off the
> > > card outside of Myth and use MythVideo with the internal player to see
> > > what happens with the audio. If possible put this on the internet so
> > > someone can download it to see if they also get the audio sync issues
> > > with your recordings.
> >
> >
> >  How would a person go about doing this?  I know how to play video but I
> do
> > not know how to directly capture the stream to a file in a format that
> can
> > be played back.
>
> iirc, with the HD3000, azap -r a channel then just "cat
> /dev/dvb/adaptor0/dvb > test.mpg" will work...
>
> --
> Steve
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> http://www.mythtv.org/wiki/index.php/Frequently_Asked_Questions
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