On Tue, Dec 29, 2020 at 10:13 AM Mark Filipak (ffmpeg) <markfili...@bog.us> wrote:
> On 12/29/2020 04:04 AM, Paul B Mahol wrote: > > On Tue, Dec 29, 2020 at 9:56 AM Mark Filipak (ffmpeg) < > markfili...@bog.us> > > wrote: > > > >> On 12/29/2020 03:41 AM, Paul B Mahol wrote: > >>> On Tue, Dec 29, 2020 at 5:51 AM Mark Filipak (ffmpeg) < > >> markfili...@bog.us> > >>> wrote: > >>> > >>>> I seek a way to do simple bob (i.e. repeat fields at 2xFPS) with no > >> other > >>>> filtering. Can you help me? > >>>> > >>>> I suppose I could do something like this: > >>>> -filter_complex > >>>> > >>>> > >> > "split[s1][s2],[s1]separatefields[A1][a1],[s2]separatefields[A2][a2],[A1][A2]weave[Ao],[a1][a2]weave[ao],[Ao][ao]merge" > >>>> (Kindly forgive any mistakes -- I haven't done anything like this in a > >>>> couple of months.) > >>>> But I thought I'd ask here for an easier way. > >>>> > >>>> These gave pretty good results. They're listed from best to worst: > >>>> bwdif > >>>> yadif=send_field_nospatial > >>>> yadif=send_field > >>>> > >>>> However, I suspect that, in addition to mechanical frame changes, > >> they're > >>>> also making some > >>>> (unwanted) cosmetic changes. > >>>> > >>>> Based on what's written in the documention, these seemed promising: > >>>> separatefields,doubleweave > >>>> separatefields,tinterlace=mergex2 > >>>> > >>>> But they produced surprising and undesired results. > >>>> > >>>> Optional Reading: > >>>> > >>>> I also tried this: > >>>> > >>>> separatefields,select=eq(mod(n,4),0)+eq(mod(n,4),3),weave > >>>> > >>>> It's not what I actually want, but I tried it because it doesn't make > >>>> sense to me -- weave together > >>>> fields N%4==0 and N%4==3? (Really? Modulo-4? fields 0 & 3?) -- so, > >> because > >>>> it doesn't make sense to > >>>> me, I thought I might learn something interesting. So, what happened? > >>>> "Conversion failed!" is what > >>>> happened. Why it's cited as an example ( > >>>> https://ffmpeg.org/ffmpeg-filters.html#Examples-121) in the > >>>> documentation is a mystery to me. > >>>> > >>> > >>> After so much time you still struggle a lot, buy some GUI tools and be > >>> happy ever after. > >> > >> You're not helping, Paul. > >> > > > > I'm helping you so you can help yourself. > > > > > >> > >>> You probably missing \ to escape every , inside expressions. > >> > >> I'm running in Windows. > >> > > > > That is not important. Either escape ',' inside expressions or do not ask > > for help if you gonna ignore help. > > Ah! "inside expressions". Sorry. Yes, I '\,' inside expressions. I'm not > using any expressions. > Looks like there is very big language/logic gap between us. Try this: "separatefields,select=eq(mod(n\,4)\,0)+eq(mod(n\,4)\,3),weave" > _______________________________________________ > 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".
