[mythtv-commits] Ticket #8030: AC3 track confuses trunk audio code
MythTV
mythtv at cvs.mythtv.org
Fri Feb 5 19:56:49 UTC 2010
#8030: AC3 track confuses trunk audio code
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Reporter: Yeechang Lee <ylee@…> | Owner: jyavenard
Type: defect | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Audio Output | Version: head
Severity: medium | Mlocked: 0
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My frontend has a Chaintech AV-710 sound card, and all audio goes from the
frontend to my receiver via S/PDIF. Playing non-AC3 and AC3 audio from my
MythTV recordings has almost always been flawless.
Since moving to the trunk/0.23 audio code, for the last month or so of
''The Tonight Show with Conan O'Brien'' before cancelation, its AC3 track
would usually confuse mythfrontend. The issue may be caused by the
transition between non-AC3 and AC3 audio in the same recording. Four
samples from the last episode are available, each 100MB (about 55 seconds)
in length.
*[https://docs.google.com/leaf?id=0B9pxJys5bvq7ODViYWNkZmEtMzZmMC00YTY1LTgyYzktODdmMzFkZTM1NjQy&hl=en
conan.mpg] Taken from the middle of the recording. Audio plays properly.
*[https://docs.google.com/leaf?id=0B9pxJys5bvq7ZjYyZDQyNmEtNGE4MC00MDgxLTgzMWEtZTE0MGNjZWNkYWI3&hl=en
conan2.mpg] Taken from the beginning of the recording. The non-AC3 track
from the local-news program preceding ''Tonight'' plays correctly; the AC3
track from ''Tonight'' does not.
*[https://docs.google.com/leaf?id=0B9pxJys5bvq7N2UwZGUzZjUtNmI3ZC00Yzk0LTliZDgtMDY1MTdiMmU5Y2Jh&hl=en
conan3.mpg] Starts a second or two after ''Tonight'' begins. Audio plays
correctly.
*[https://docs.google.com/leaf?id=0B9pxJys5bvq7YmE4MDYzMGEtMWZhYS00OTE0LWEyOWMtNTE5YzAwOTZiMWYx&hl=en
conan4.mpg] Starts just before or after (hard to tell) ''Tonight'' begins.
Audio does not play correctly.
This issue also exists with other NBC programs, but not consistently as
with ''Tonight''; last night's episode of ''Community'' does, but previous
ones did not. Both recordings are from over-the-air; unfortunately I do
not know if other NBC recordings I've seen with the issue were also from
OTA as opposed to FireWire.
--
Ticket URL: <http://svn.mythtv.org/trac/ticket/8030>
MythTV <http://www.mythtv.org/>
MythTV
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