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 probably missing \ to escape every , inside expressions. > _______________________________________________ > 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".
