[FFmpeg-trac] #9404(undetermined:new): Cropdetect sometime returns wrong values
FFmpeg
trac at avcodec.org
Fri Sep 3 17:50:43 EEST 2021
#9404: Cropdetect sometime returns wrong values
--------------------------------------+----------------------------------
Reporter: rotacak | Type: defect
Status: new | Priority: normal
Component: undetermined | Version:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
--------------------------------------+----------------------------------
Summary of the bug:
When I will use cropdetect on specific video then returned values are
wrong.
How to reproduce:
'''ffmpeg.exe -i game.mp4 -vf cropdetect=24:16:0 -c:a copy -f null -'''
{{{
ffmpeg version n4.4-80-gbf87bdd3f6-20210902 Copyright (c) 2000-2021 the
FFmpeg developers
built with gcc 10-win32 (GCC) 20210408
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
--enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
--enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
--enable-libvmaf --enable-vulkan --disable-libxcb --disable-xlib --enable-
amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2
--disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r
--enable-libglslang --enable-libgme --enable-libass --enable-libbluray
--enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx
--enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e
--enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr
--enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d
--disable-libdrm --disable-vaapi --enable-libvidstab --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg
--enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags=
--extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-
version=20210902
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
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 'game.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2021-09-03T13:54:43.000000Z
Duration: 00:00:18.60, start: 0.000000, bitrate: 1142 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
800x450 [SAR 1:1 DAR 16:9], 1141 kb/s, 10 fps, 10 tbr, 20k tbn, 20 tbc
(default)
Metadata:
creation_time : 2021-09-03T13:54:43.000000Z
handler_name : Mainconcept MP4 Video Media Handler
vendor_id : [0][0][0][0]
encoder : AVC Coding
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
encoder : Lavf58.76.100
Stream #0:0(eng): Video: wrapped_avframe, yuv420p(progressive), 800x450
[SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 10 fps, 10 tbn (default)
Metadata:
creation_time : 2021-09-03T13:54:43.000000Z
handler_name : Mainconcept MP4 Video Media Handler
vendor_id : [0][0][0][0]
encoder : Lavc58.134.100 wrapped_avframe
[Parsed_cropdetect_0 @ 000001a46e76d4c0] x1:145 x2:652 y1:48 y2:374 w:496
h:320 x:152 y:52 pts:4000 t:0.200000 crop=496:320:152:52
[Parsed_cropdetect_0 @ 000001a46e76d4c0] x1:145 x2:652 y1:48 y2:374 w:496
h:320 x:152 y:52 pts:6000 t:0.300000 crop=496:320:152:52
...
[Parsed_cropdetect_0 @ 000001a46e76d4c0] x1:145 x2:652 y1:48 y2:374 w:496
h:320 x:152 y:52 pts:368000 t:18.400000 crop=496:320:152:52
[Parsed_cropdetect_0 @ 000001a46e76d4c0] x1:145 x2:652 y1:48 y2:374 w:496
h:320 x:152 y:52 pts:370000 t:18.500000 crop=496:320:152:52
frame= 186 fps=0.0 q=-0.0 Lsize=N/A time=00:00:18.60 bitrate=N/A speed=
127x
video:97kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
Crop value is: '''496:320:152:52'''. Then I will use it to create cropped
video:
'''ffmpeg.exe -r 10 -i game.mp4 -vf crop=496:320:152:52 -c:v libx264 -b:v
400k final.mp4'''
{{{
ffmpeg version n4.4-80-gbf87bdd3f6-20210902 Copyright (c) 2000-2021 the
FFmpeg developers
built with gcc 10-win32 (GCC) 20210408
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
--enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
--enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
--enable-libvmaf --enable-vulkan --disable-libxcb --disable-xlib --enable-
amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2
--disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r
--enable-libglslang --enable-libgme --enable-libass --enable-libbluray
--enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx
--enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e
--enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr
--enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d
--disable-libdrm --disable-vaapi --enable-libvidstab --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg
--enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags=
--extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-
version=20210902
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
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 'game.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2021-09-03T13:54:43.000000Z
Duration: 00:00:18.60, start: 0.000000, bitrate: 1142 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
800x450 [SAR 1:1 DAR 16:9], 1141 kb/s, 10 fps, 10 tbr, 20k tbn, 20 tbc
(default)
Metadata:
creation_time : 2021-09-03T13:54:43.000000Z
handler_name : Mainconcept MP4 Video Media Handler
vendor_id : [0][0][0][0]
encoder : AVC Coding
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 00000146513ae5c0] using SAR=1/1
[libx264 @ 00000146513ae5c0] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000146513ae5c0] profile High, level 2.1, 4:2:0, 8-bit
[libx264 @ 00000146513ae5c0] 264 - core 164 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1
ref=5 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=8 psy=1
psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=2 8x8dct=1
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=10
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=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=10
scenecut=40 intra_refresh=0 rc_lookahead=50 rc=abr mbtree=1 bitrate=400
ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'final.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
encoder : Lavf58.76.100
Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p(progressive),
496x320 [SAR 1:1 DAR 31:20], q=2-31, 400 kb/s, 10 fps, 10240 tbn (default)
Metadata:
creation_time : 2021-09-03T13:54:43.000000Z
handler_name : Mainconcept MP4 Video Media Handler
vendor_id : [0][0][0][0]
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/400000 buffer size: 0 vbv_delay: N/A
[mp4 @ 00000146512de000] Starting second pass: moving the moov atom to the
beginning of the file
frame= 186 fps=0.0 q=-1.0 Lsize= 725kB time=00:00:18.30 bitrate=
324.4kbits/s speed=27.1x
video:722kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.412691%
[libx264 @ 00000146513ae5c0] frame I:1 Avg QP:22.40 size: 33739
[libx264 @ 00000146513ae5c0] frame P:62 Avg QP:20.55 size: 9928
[libx264 @ 00000146513ae5c0] frame B:123 Avg QP:26.42 size: 724
[libx264 @ 00000146513ae5c0] consecutive B-frames: 6.5% 12.9% 9.7% 71.0%
[libx264 @ 00000146513ae5c0] mb I I16..4: 0.2% 0.3% 99.5%
[libx264 @ 00000146513ae5c0] mb P I16..4: 0.4% 1.2% 2.0% P16..4:
45.1% 7.1% 4.9% 0.0% 0.0% skip:39.4%
[libx264 @ 00000146513ae5c0] mb B I16..4: 0.0% 0.0% 0.1% B16..8:
11.8% 1.2% 0.6% direct: 0.5% skip:85.7% L0:40.4% L1:56.2% BI: 3.4%
[libx264 @ 00000146513ae5c0] final ratefactor: 19.62
[libx264 @ 00000146513ae5c0] 8x8 transform intra:22.9% inter:30.4%
[libx264 @ 00000146513ae5c0] direct mvs spatial:96.7% temporal:3.3%
[libx264 @ 00000146513ae5c0] coded y,uvDC,uvAC intra: 77.8% 45.2% 43.2%
inter: 9.5% 13.6% 10.7%
[libx264 @ 00000146513ae5c0] i16 v,h,dc,p: 75% 23% 2% 0%
[libx264 @ 00000146513ae5c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 6% 36%
4% 7% 2% 13% 4% 12%
[libx264 @ 00000146513ae5c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 22% 12%
4% 7% 5% 10% 7% 21%
[libx264 @ 00000146513ae5c0] i8c dc,h,v,p: 70% 11% 12% 7%
[libx264 @ 00000146513ae5c0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 00000146513ae5c0] ref P L0: 73.2% 3.7% 11.7% 5.2% 4.2% 1.9%
[libx264 @ 00000146513ae5c0] ref B L0: 77.5% 10.0% 4.3% 8.1%
[libx264 @ 00000146513ae5c0] ref B L1: 97.8% 2.2%
[libx264 @ 00000146513ae5c0] kb/s:317.57
}}}
Result:
Final video is cropped also on top inside picture and that should not be.
Example small videos:
https://www.mediafire.com/folder/gseavq0vx165x/ffmpeg
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9404>
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