[mythtv] Funky 720p playback

[Brad Borgald]

Robert Kulagowski wrote:
> Keith Cremer wrote:
>   
>> On Mar 2, 2008, at 1:20 PM, Bill Cizek wrote:
>>
>>     
>>>> AFAICT this WLSDT is not broadcasting broken streams, they are just  
>>>> using
>>>> an encoding extension we don't support very well. These streams do  
>>>> in fact
>>>> play on powerful MythTV machines. I believe they are broadcasting  
>>>> about 40
>>>> fps on a 60fps stream and marking some of the frames as repeatable,  
>>>> but I
>>>> haven't added the debugging statements to MythTV to confirm this.  
>>>> If true,
>>>> MythTV doesn't know what is going on and so the only way it adjusts  
>>>> is with
>>>> the A/V sync code. This works, but is CPU intensive.
>>>>
>>>> -- Daniel
>>>>
>>>>         
>>> I've got a 3.2 GHz P4 and it plays,  it's just funky - kind of like  
>>> you
>>> describe above.
>>>
>>> Are you referring to the top_field_first and repeat_first_field flags?
>>>
>>> I checked my problem recordings and these flags are set within them.
>>>
>>> Recordings where they're unset play fine.
>>>
>>> If there's anything I can do to help fix / test this let me know.
>>>
>>> -Bill 
>>>       
>> Mine are playing back on a high end Core 2 with plenty of power to  
>> spare.  I'll do some test captures using the HDHomeRun and VLC to see  
>> if the stream is intact, and then look at the playback in Myth.
>>     
>
> On a 2.8Ghz P4, it's pretty much unwatchable; the audio and video get 
> separated by 3-5 seconds.  (But 720p from Fox is OK and works AFAICT).
>   
I'm not sure if I'm experiencing the same issue.  My 720p content is 
coming from my STB over firewire, not a HD HomeRun.  1080i mpeg2content 
is fine, as is 720p/1080p H264, only 720p mpeg2 content seems to be the 
issue.  I'm running a core 2 duo @ 2.9Ghz, so I think I've got all kinds 
of cpu power.  I opened ticket #4859 with logs and a sample.  Mplayer 
has no problem playing the file.

Brad