[mythtv-users] Recordings Playback too fast on Frontend, fine on Backend

[Michael T. Dean]

On 03/02/2009 03:09 PM, jk90090 wrote:
> Michael T. Dean wrote:
>> First, no need to bump your post after 53 minutes--or, more likely, 
>> what you missed was--yes, your post went through.  <rant>Thanks to 
>> gmail's "it's not e-mail, it's g-mail, so we do things differently" 
>> interface, you don't get to see your messages until someone replies 
>> to them.  (How wonderful of them to invent a replacement for 
>> e-mail...)</rant>  Please always check the archives before re-sending 
>> a post.  http://www.gossamer-threads.com/lists/mythtv/ may take many 
>> (up to 12) hours to be updated to include new posts; whereas, 
>> http://mythtv.org/pipermail/mythtv-users/ is updated "immediately."
>>
> First off, I got back an "undelivered mail" back from the mythtv mail 
> system ~50 minutes after my original post, indicating a mail 
> forwarding loop for mythtv-users, hence the repost.

Ah, yeah, there was a period where the server was, er, confused.  Just 
figured you were another person confused by gmail.

>> Answers inline...
>>
>> On 03/01/2009 12:12 PM, jk90090 wrote:
>>> Just replaced my OTA tuners with an HDHomerun, pulling video from 
>>> QAM.  Recordings happen as expected, but when I go to playback the 
>>> recordings, some (FOX it seems) playback tooo fast, as if I've 
>>> increased the playback speed, and the video & audio don't sync.
>>
>> This is one or both of 2 configuration issues.  Make sure you do 
>> /not/ enable the "experimental" (= "do /not/ use this setting, it 
>> doesn't work because the video in the real world is all broken") 
>> setting:
>>
>> Use video as timebase
>> Use the video as the timebase and warp the audio to keep it in sync. 
>> (Experimental)
>>
>> and make sure you configure your audio subsystem (outside of Myth) to 
>> enable playback of audio with sample rates other than 48kHz.  You may 
>> be playing back a recording with 32kHz audio, but your sound card is 
>> slurping it up at 48kHz, making it play back faster and making voices 
>> sound "like chipmunks."
>>
>> See http://www.mythtv.org/wiki/index.php/Configuring_Digital_Sound 
>> (and try to ignore all the completely wrong information on the page) 
>> for more info.  (And note that if you value your time, it may be 
>> cheaper to just get a new sound card that sets up more easily.  The 
>> Turtle Beach Riviera is one of the favorites on this list.)
> Everything checks out on this front too.  I'm trying turning the 
> various settings on and off in different combinations to no avail.  
> I'll recheck the the settings in the DB settings table.

The audio settings are not Myth settings.  You must configure your 
system-level sound subsystem properly (i.e. ALSA).

>>> The backend plays the recordings fine (though also shows the time 
>>> length incorrect, and seconds take twice as long to tick by), and 
>>> VLC will play the recordings fine on my Vista PC.  Ideas? 
>> The backend's audio is probably properly configured.
> Same settings.  *Shrug* 

Again, not myth settings.

Mike