Re: [MPlayer-users] ATSC 720@24p streams

[Nico Sabbi <nicola_sabbi@xxxxxxxxxxxxx>]

rob wrote:

> it looks like my local ABC affiliate has started sending certain
> primetime shows as 720@xxx with RFF, TFF and Progressive flags set 
> up for soft telecine to 60p.
>
> mplayer and mencoder don't seem to handle this at all. the code 
> for detecting telecined material appears to be written for 
> 29.97i->23.976p, such as is found on a DVD.
>
> the mpeg demuxer code itself seems to be properly calculating 
> the display times for these frames; with -v -v i see 2.0 and 
> 3.0 alternating. however, in libmpdemux/video.c, the telecine 
> detection code looks for an average display time of 1.25 and 
> then converts the frame rate to 4/5 of the original.
>
> i'm not sure what the right way to fix this is. perhaps the 
> 1.25 and 4/5 should be conditional on the input frame rate?
> that is, if it is 29.97, then the code is correct as it stands,
> but if it is 59.94 then 2.5 and 2/5 should be used instead?
>
> thanks,
>
> rob
>
>  

does it go out of sync so as it is?
I'm not entirely sure that telecining is worth reversing
(when you use -demuxer lavf mplayer doesn't do it)

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