[mythtv] [mythtv-commits] Ticket #3608: Latest ffmpeg sync causes decoded AC3 audio to sound like it is going through a table fan.

[Mark Spieth]

> #3608: Latest ffmpeg sync causes decoded AC3 audio to sound like it is 
> going
> through a table fan.
> -----------------------+----------------------------------------------------
> Reporter:  anonymous  |        Owner:  janne
>     Type:  defect     |       Status:  new
> Priority:  major      |    Milestone:  0.21
> Component:  mythtv     |      Version:  head
> Severity:  high       |   Resolution:
>  Mlocked:  0          |
> -----------------------+----------------------------------------------------
>
> Comment(by janne):
>
> Replying to [comment:3 darkstarsword at gmail.com]:
> > I have uploaded a 30 second sample file (24MiB) from ABC TV Canberra
> here:
> >
> > http://www.megaupload.com/?d=INKM9DIV
>
> I can't reproduce the audio distortions. I don't hear a difference.
>
> Can you please try if the attached patch fixes the audio decoding? I doubt
> it but it's worth a try.
>
> If it doesn't help please reply with system details and configure options
> and output.
>

janne
I noticed you enabled liba52 and changed the ac3 stuff.
you didnt need to change the ac3 stuff (looks regressed), just disable it.
since there are 2 ac3 decoders in the lavc, you cant be sure which one its 
going to pick. so I disabled the internal ac3 decoder and enabled liba52.
I noticed that you didnt disable the internal ac3 decoder. I dont believe 
the internal decoder has ever been used before the latest ffmpeg sync.
my current configure which works with channel 10 melb (AC3) is
--enable-liba52bin --enable-liba52 --disable-decoder=ac3 --enable-decoder=liba52
I suspect 2 items are superfluous.

mark