<br><div class="gmail_quote">On Fri, May 30, 2008 at 2:15 AM, Michael T. Dean <<a href="mailto:mtdean@thirdcontact.com">mtdean@thirdcontact.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">On 05/29/2008 11:30 AM, scram69 wrote:<br>
> Recently upgraded to 0.21 so I could finally get ac3 passthrough<br>
> working on my osx frontend. When it works, it's great - however...<br>
><br>
> Just about every other time I start to watch a recording, the<br>
> playback, both video and sound, is accelerated, as if I were watching<br>
> using 2x-3x timestretch or fast forward. (I bring up the time stretch<br>
> menu, and it indicates 1.0x) If I uncheck ac3 passthrough in the<br>
> Setup>General menu, the problem goes away.<br>
><br>
> Unfortunately, the frontend log output is _exactly_ the same when I<br>
> see this accelerated playback as when I do not.<br>
><br>
> There have been a number of posts about ac3 passthrough in 0.21, but<br>
> in searching, I haven't come across this issue. Has anyone else<br>
> experienced this?<br>
<br>
</div>Does it always happen on any given recording or are you saying that on a<br>
particular recording, you'll sometimes see it play incorrectly and<br>
sometimes see it play correctly?<br>
<br>
If it always happens on a given recording, it's just a matter of your<br>
broadcaster choosing to use 32kHz AC-3, which the vast majority of<br>
computer-based sound cards cannot handle (they play it as 48kHz, thus<br>
the "timestrech"--which is actually more of a "chipmunking" as there<br>
shouldn't be pitch correction). Myth just keeps the video in sync with<br>
the audio as passthrough means that adjusting the audio stream is<br>
impossible.<br>
<br>
Oh, and if you enable timestretch--even to 1.05x or something--it will<br>
"make it work" by disabling passthrough. TTBOMK, even if you then go<br>
back to 1.0x, it will still "work" (as Myth won't re-enable passthrough<br>
unless you exit playback and restart playback).<br>
<br>
Mike<br>
<div></div></blockquote><div><br><br>-Ubuntu 8.04 + Mythbuntu 8.04 + weekly fixes repository<br>-X64 build<br>-"Great Outdoors" show on TenHD in canberra<br>-AC3/DTS passthrough set to ON or OFF (I'm using AC3 on an nvidia chipset motherboard)<br>
<br></div></div>I get this bug. ONLY this show as far as I can tell. If I set timestretch to 1.1 then back to 1.0 it plays fine, as advised.<br><br>Note though, this happens with AC3 and DTS passthrough OFF as well as on (sound is always set to stereo ).<br>
<br>What can I do to help debug and help get this resolved? I'm happy to upload a sample video or logs or is the other info in this thread enough?<br>