On 3/8/22, llee040 <[email protected]> wrote: > > >> On Mar 8, 2022, at 11:32 AM, morgan holly via ffmpeg-user >> <[email protected]> wrote: >> >> Hi, >> >> I’m trying to remove telecine from a prores mov file using the pullup >> filter: >> >> Source file: >> Video: prores (LT), top coded first (swapped)), 720x480, 29.97 fps, 29.97 >> tbr, 30k tbn, 30k tbc (default) >> >> Command: >> ffmpeg -i pullup_test.mov -an -vf pullup -r 24000/1001 -pix_fmt yuv420p -y >> pullup_test1.mov >> >> Result: >> Every fourth frame on the 23.976 output has chroma lag (3/2 removed from >> luma, but chroma is still interlaced). Dejudder doesn’t fix it and >> fieldmatch+decimate does worse things. >> >> Test sources: >> I’ve seen the artifact on both live action and clean animation sources. I >> cannot share the sources but created a short example that can be used to >> recreate the issue: >> >> Test source with 3/2: >> http://videopress.s3.amazonaws.com/misc/pullup_test.mov >> <http://videopress.s3.amazonaws.com/misc/pullup_test.mov> >> >> Test pullup 23.976 output: >> http://videopress.s3.amazonaws.com/misc/pullup_test_1.mov >> <http://videopress.s3.amazonaws.com/misc/pullup_test_1.mov> >> >> Thanks for any help! >> > > Not sure if this will help but it seemed to create slightly better output > for your test movie when substituted for “pullup”: > > detelecine=first_field=b:start_frame=0,yadif=deint=interlaced
If it still use yuv420p as first format in chain, it is wrong and not correct approach. > > ffmpeg -i pullup_test.mov -an -vf > detelecine=first_field=b:start_frame=0,yadif=deint=interlaced -r 24000/1001 > -pix_fmt yuv420p -y pullup_test1.mov > > L. Lee > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
