[mythtv-users] Sound a second behind video

[Mark Hutchinson]

Michael T. Dean wrote:
> On 03/12/2008 08:12 AM, Mark Hutchinson wrote:
>   
>> On 12-Mar-08, at 12:16 AM, Michael T. Dean wrote:
>>     
>>> On 03/11/2008 11:05 AM, Mark Hutchinson wrote:
>>>     
>>>       
>>>> Running latest 21 ATRPMS on F8.
>>>> Capture via firewire.
>>>> Nvidia 7300 on 1280x1024 monitor. ( latest livna nvidia drivers 169 )
>>>> Audigy B PCU sound card
>>>> I have tried all playback profiles ( and a few custom ones ) but am
>>>> seeing all audio about a second(ish) behind video.
>>>> Aggressive audio enabled.
>>>>       
>>>>         
>>> Have you tried plugging in directly to your TV's tuner?  I would guess
>>> it's the re-broadcaster (cable/satellite company) or their STB.
>>>       
>> Yes, it is perfect directly into the TV.
>> It also works perfectly watching live TV if it is HD.
>> If the live TV is SD, sound is delayed 1 second(ish)
>>
>> SD is totally unwatchable.
>>     
>
> BTW, you've probably mentioned this, but I don't remember and don't feel 
> like digging through all the posts, but did you try playing back the 
> recording with other media players (i.e. mplayer, vlc, xine, and--if 
> possible--some Windows based media players) to determine whether the 
> file is corrupt or if it's just a problem with Myth's playback of the file.
>
> If the problem is in Myth's playback, playing it with ffplay (which 
> comes with ffmpeg) would be a good test of whether it's a Myth problem 
> or an upstream (ffmpeg) problem.  Ideally, you would play it back with 
> the ffplay from the ffmpeg SVN revision MythTV 0.21 is currently using 
> (I'm pretty sure that's ffmpeg revision 11051).
>
> Mike
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>   
Excellent question.  This I have done. I went directly to my 
/video/recordings and played the files with mplayer and xine.  They are 
fine.  But, with the Internal player, sound issues. 
Live TV in the Internal player on SD is where it is the worst.  Though, 
sometimes, rewinding live TV just a few seconds results in the 
audio/video to be sync'd fine again. 

Does this clarify or point at a possible area that could be the 
problem?  I will also try the ffplay later as well.