[FFmpeg-user] Filter documentation -- PTSs

[Phil Rhodes]

 How does all this interact with files from cameras with very stable timing, such as broadcast and cinema cameras?
Is there not a risk of long-term rounding errors?
P
    On Monday, 15 February 2021, 01:13:37 GMT, Paul B Mahol <onemda at gmail.com> wrote:  
 
 On Mon, Feb 15, 2021 at 1:46 AM Mark Filipak (ffmpeg) <markfilipak at bog.us>
wrote:

> On 02/14/2021 07:34 PM, Paul B Mahol wrote:
> > On Mon, Feb 15, 2021 at 12:50 AM Mark Filipak (ffmpeg) <
> markfilipak at bog.us>
> > wrote:
> >
> >> Disclosure: Everything that follows may be wrong.
> >>
> >> I reckon that, except for a few filters, the important metric is PTS,
> not
> >> the frame #s assigned at a
> >> filter's input node nor its wall-clock arrival time at a filter's input
> >> node. For example,
> >> 'interleave' performs frame interleaves based on the PTSs of incoming
> >> frames -- at least, that's
> >> what I think.
> >>
> >> Am I correct?
> >>
> >> If so, wouldn't it be helpful if filter documentation included how it
> >> generates PTSs?
> >>
> >
> > PTS are not generated.
>
> ffmpeg -i SOURCE -vf telecine TARGET
>
> What are the PTSs of the first 5 frames at the output of the filter?
>
>
Interpolated by very complex formula.


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