[FFmpeg-user] Pullup filter is introducing chroma lag
Paul B Mahol
onemda at gmail.com
Tue Mar 8 21:07:32 EET 2022
On 3/8/22, morgan holly via ffmpeg-user <ffmpeg-user at ffmpeg.org> 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!
>
> FFMPEG output:
>
> ffmpeg -i /Volumes/Drive5/videopress_testing/pullup_test.mov -an -vf pullup
Your input is yuv422p10, thus use format filter before
pullup/fieldmatch to get proper results.
Pullup and fieldmatch internally works only with 8 bit depth formats,
(fieldmatch additionally supports post processing input that can be
used to get back 10 bit output)
thus -vf format=yuv422p,pullup .... is one possible processing version.
Otherwise, yuv420p is picked and pullup/fieldmatch get yuv420p
processing of auto inserted scale filter which is not aware that input
is telecined, and messes up the chroma plane when downsampling to
worse quality pixel format.
> -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
>
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