[mythtv] pts values

[Peter Bennett]

On 09/07/2018 07:13 PM, David Engel wrote:
>> This is bizarre! It looks like perhaps the clip was rate converted fron 60hz to 50hz, and is then again rate converted back to 60hz. The only way to deal with this assuming we cant believe the fps is to use the pts directly assuming that we can trust those too, which in the past we couldnt.
> Agreed (that it's bizarre).  Peter, where do you get that sample, US
> ABC or Oz ABC?  If US, does your local affiliate or cable company do
> any conversions?  My local ABC affiliate, for example, broadcasts in
> 1080i so everything from the network is converted locally from 720p.
> The fps changes are strange.  I could see the cable company doing
> strange things with locally inserted commericals (TWC used to do that
> here) but that shouldn't be any locally inserted commercials with ABC.
> Maybe your local affiliate or cable company are doing that to squeeze
> out every last bit of bandwidth that they can get.
ABC from Boston Massachusetts. I live in Massachusetts and get Comcast 
cable. Where I am located there is no broadcast signal, so I cannot 
compare with that. I don't know what Comcast does with the signal. This 
is from a year or two ago. I notice now my Comcast ABC station is 
running 720p. I don't know if Comcast or ABC made the change.
>> My tvs are a mix of 50 and 60hz, au being traditionally a 50hz place. But they are being run at 60.
>>
>> Maybe we need to change how fps is determined which I think currently uses a ffmpeg call.
> Well, we've got to believe something.  As for frame drop prediction, I
> suggest it get recalculated the fps, reported or calculated, changes.

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