Hello,
I'm trying to use nnedi to deinterlace a 29.97 fps video without
doubling the frame rate. I added the fields=a option which I thought was
supposed to make nnedi only use one of the two fields, but the output is
still 59.94 fps. Is this a bug or am I misunderstanding something?
Here's the command and the output:
$ ffmpeg -i foo.mkv -vf nnedi=weights=nnedi3_weights.bin:field=a bar.mkv
ffmpeg version 4.4.2 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 11 (GCC)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg
--incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man
--arch=x86_64 --optflags='-O2 -flto=auto -ffat-lto-objects -fexceptions
-g -grecord-gcc-switches -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'
--extra-ldflags='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 ' --extra-cflags='
-I/usr/include/rav1e' --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3
--enable-bzlib --enable-chromaprint --disable-crystalhd
--enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls
--enable-ladspa --enable-libaom --enable-libdav1d --enable-libass
--enable-libbluray --enable-libbs2b --enable-libcdio --enable-libdrm
--enable-libjack --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libmysofa
--enable-nvenc --enable-openal --enable-opencl --enable-opengl
--enable-libopenjpeg --enable-libopenmpt --enable-libopus
--enable-libpulse --enable-librsvg --enable-librav1e --enable-librtmp
--enable-librubberband --enable-libsmbclient --enable-version3
--enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt
--enable-libssh --enable-libsvtav1 --enable-libtesseract
--enable-libtheora --enable-libtwolame --enable-libvorbis
--enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-version3
--enable-vapoursynth --enable-libvpx --enable-vulkan --enable-libglslang
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
--enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi
--enable-lv2 --enable-avfilter --enable-avresample --enable-libmodplug
--enable-postproc --enable-pthreads --disable-static --enable-shared
--enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64
--enable-lto --enable-libmfx --enable-runtime-cpudetect
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, matroska,webm, from 'foo.mkv':
Metadata:
ENCODER : Lavf58.76.100
Duration: 00:00:15.02, start: 0.000000, bitrate: 9479 kb/s
Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, top coded first
(swapped)), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1k tbn,
59.94 tbc (default)
Metadata:
DURATION : 00:00:15.015000000
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x55ee59541800] using SAR=1/1
[libx264 @ 0x55ee59541800] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x55ee59541800] profile High, level 4.2, 4:2:0, 8-bit
[libx264 @ 0x55ee59541800] 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=6
lookahead_threads=1 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=25 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
Output #0, matroska, to 'bar.mkv':
Metadata:
encoder : Lavf58.76.100
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, bt709,
progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 59.94 fps, 1k tbn
(default)
Metadata:
DURATION : 00:00:15.015000000
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 450 fps= 20 q=-1.0 Lsize= 1847kB time=00:00:14.91
bitrate=1014.2kbits/s speed=0.654x
video:1843kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.199605%
[libx264 @ 0x55ee59541800] frame I:2 Avg QP:10.29 size: 23832
[libx264 @ 0x55ee59541800] frame P:147 Avg QP:17.66 size: 7200
[libx264 @ 0x55ee59541800] frame B:301 Avg QP:18.50 size: 2593
[libx264 @ 0x55ee59541800] consecutive B-frames: 8.4% 3.6% 10.7% 77.3%
[libx264 @ 0x55ee59541800] mb I I16..4: 76.3% 20.3% 3.5%
[libx264 @ 0x55ee59541800] mb P I16..4: 3.5% 6.9% 0.1% P16..4:
15.4% 1.3% 1.3% 0.0% 0.0% skip:71.4%
[libx264 @ 0x55ee59541800] mb B I16..4: 0.2% 0.1% 0.0% B16..8:
10.9% 0.2% 0.0% direct: 5.1% skip:83.5% L0:47.7% L1:51.7% BI: 0.6%
[libx264 @ 0x55ee59541800] 8x8 transform intra:59.5% inter:96.0%
[libx264 @ 0x55ee59541800] coded y,uvDC,uvAC intra: 11.2% 56.7% 16.9%
inter: 1.9% 11.2% 0.1%
[libx264 @ 0x55ee59541800] i16 v,h,dc,p: 64% 22% 6% 7%
[libx264 @ 0x55ee59541800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 9% 69%
1% 1% 1% 1% 1% 0%
[libx264 @ 0x55ee59541800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 44% 18% 22%
3% 3% 4% 2% 3% 2%
[libx264 @ 0x55ee59541800] i8c dc,h,v,p: 50% 23% 25% 3%
[libx264 @ 0x55ee59541800] Weighted P-Frames: Y:4.8% UV:2.7%
[libx264 @ 0x55ee59541800] ref P L0: 64.4% 2.3% 22.3% 10.5% 0.5%
[libx264 @ 0x55ee59541800] ref B L0: 89.5% 8.5% 2.0%
[libx264 @ 0x55ee59541800] ref B L1: 96.5% 3.5%
[libx264 @ 0x55ee59541800] kb/s:1005.15
Thanks,
Alex
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