[FFmpeg-user] Pullup filter is introducing chroma lag

Tue Mar 8 19:32:11 EET 2022

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!

FFMPEG output:

ffmpeg -i /Volumes/Drive5/videopress_testing/pullup_test.mov -an -vf pullup -r 24000/1001 -pix_fmt yuv420p -y /Volumes/Drive5/videopress_testing/pullup_test1.mov
ffmpeg version 4.4.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 13.0.0 (clang-1300.0.29.3)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/Drive5/videopress_testing/pullup_test.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2022-03-08T16:50:01.000000Z
  Duration: 00:00:13.41, start: 0.000000, bitrate: 2465 kb/s
  Stream #0:0(eng): Video: prores (LT) (apcs / 0x73637061), yuv422p10le(tv, smpte170m/smpte170m/bt709, top coded first (swapped)), 720x480, 1840 kb/s, SAR 10:11 DAR 15:11, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
    Metadata:
      creation_time   : 2022-03-08T16:50:01.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      encoder         : Apple ProRes 422 LT
      timecode        : 00:00:00;00
  Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2022-03-08T16:50:01.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00;00
Stream mapping:
  Stream #0:0 -> #0:0 (prores (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7fba5f822000] using SAR=10/11
[libx264 @ 0x7fba5f822000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x7fba5f822000] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x7fba5f822000] 264 - core 163 r3060 5db6aa6 - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=15 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[mov @ 0x7fba5f831400] Drop frame is only allowed with multiples of 30000/1001 FPS
Output #0, mov, to '/Volumes/Drive5/videopress_testing/pullup_test1.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    encoder         : Lavf58.76.100
  Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709, top coded first (swapped)), 720x480 [SAR 10:11 DAR 15:11], q=2-31, 23.98 fps, 24k tbn (default)
    Metadata:
      creation_time   : 2022-03-08T16:50:01.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      timecode        : 00:00:00;00
      encoder         : Lavc58.134.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    2 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=1 droframe=  323 fps=0.0 q=-1.0 Lsize=      82kB time=00:00:13.34 bitrate=  50.2kbits/s dup=3 drop=0 speed=26.7x    
video:78kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 5.091292%
[libx264 @ 0x7fba5f822000] frame I:2     Avg QP:13.12  size:   698
[libx264 @ 0x7fba5f822000] frame P:212   Avg QP:21.95  size:   239
[libx264 @ 0x7fba5f822000] frame B:109   Avg QP:22.99  size:   248
[libx264 @ 0x7fba5f822000] consecutive B-frames: 39.9% 41.5% 11.1%  7.4%
[libx264 @ 0x7fba5f822000] mb I  I16..4: 99.3%  0.0%  0.7%
[libx264 @ 0x7fba5f822000] mb P  I16..4:  1.4%  0.6%  0.2%  P16..4:  0.7%  0.1%  0.0%  0.0%  0.0%    skip:96.9%
[libx264 @ 0x7fba5f822000] mb B  I16..4:  0.6%  0.0%  0.0%  B16..8:  1.6%  0.2%  0.0%  direct: 0.4%  skip:97.2%  L0:50.7% L1:47.0% BI: 2.3%
[libx264 @ 0x7fba5f822000] 8x8 transform intra:17.9% inter:49.4%
[libx264 @ 0x7fba5f822000] coded y,uvDC,uvAC intra: 2.3% 19.4% 16.8% inter: 0.1% 0.5% 0.5%
[libx264 @ 0x7fba5f822000] i16 v,h,dc,p: 69% 29%  1%  0%
[libx264 @ 0x7fba5f822000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 15% 69%  0%  0%  0%  0%  0%  0%
[libx264 @ 0x7fba5f822000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 27% 38%  0%  0%  0%  0%  0%  0%
[libx264 @ 0x7fba5f822000] i8c dc,h,v,p: 45% 35% 18%  1%
[libx264 @ 0x7fba5f822000] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fba5f822000] ref P L0: 52.8%  1.3% 28.8% 17.1%
[libx264 @ 0x7fba5f822000] ref B L0: 80.9% 18.6%  0.6%
[libx264 @ 0x7fba5f822000] ref B L1: 98.6%  1.4%
[libx264 @ 0x7fba5f822000] kb/s:46.94