On Mon, Feb 15, 2021 at 2:23 AM Mark Filipak (ffmpeg) <markfili...@bog.us> wrote:
> On 02/14/2021 08:13 PM, Paul B Mahol wrote: > > On Mon, Feb 15, 2021 at 1:46 AM Mark Filipak (ffmpeg) < > markfili...@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) < > >> markfili...@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. > > So, the PTSs are generated. > > What is the formula? Certainly it can't be anywhere nearly as complex as > the differential equations > and boundary conditions that control air flow through a duct of arbitrary > shape or the air flow > across an aircraft wing of arbitrary profile. I guess if I can handle > those, I'll be able to handle > the generated PTSs of a periodic series of frames, eh? > You need TB aka timebase too. TB is rational. PTS is 64bit integer. > > -- > Any journey, no matter how long, is just a series of small steps. > "Government is the problem!" -- 1982 and onward. > "_______ is the enemy of the people!" -- 2016 and onward. > "You have to fight like hell or you're not going to have a country!" -- > Jan 6, 2021. > It isn't the distance that's important, it's the direction. > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".