> 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 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".
