[FFmpeg-trac] #2465(avfilter:new): Hue filter bug after scale and padding

[FFmpeg]

#2465: Hue filter bug after scale and padding
----------------------------------+--------------------------------------
             Reporter:  jbvsmo    |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avfilter  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+--------------------------------------
 The "hue" filter will show some errors in the final image when shown side
 by side with the original video after it was scaled down. The errors look
 like shadows from other frames.

 Example attatched.

 If the "scale" filter is removed, the video appears normal. This will only
 happen with the "hue" filter... The others I tried worked fine.

 How to reproduce:
 {{{
 $ ffmpeg -i Madeon_Pop_Culture.flv -filter:v 'scale=320:trunc(ow/a/2)*2,
 split[a][b]; [a]pad=iw*2[aa]; [b]hue=h=45[bb]; [aa][bb]overlay=w' -t 10
 -c:a copy -b:v 800k side_by_side.mp4

 ffmpeg version N-41160-g9fa3b5b Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Apr 12 2013 14:45:58 with gcc 4.7 (Ubuntu/Linaro
 4.7.2-2ubuntu1)
   configuration: --enable-gpl --enable-libass --enable-libfaac --enable-
 libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora
 --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264
 --enable-nonfree --enable-version3 --enable-libfreetype
   libavutil      52. 26.100 / 52. 26.100
   libavcodec     55.  2.100 / 55.  2.100
   libavformat    55.  2.100 / 55.  2.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 53.101 /  3. 53.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, flv, from 'Madeon_Pop_Culture.flv':
   Metadata:
     starttime       : 0
     totalduration   : 235
     totaldatarate   : 1256
     bytelength      : 36921553
     canseekontime   : true
     sourcedata      : BADC21B01HH1323804013818706
     purl            :
     pmsg            :
   Duration: 00:03:55.15, start: 0.000000, bitrate: 1256 kb/s
     Stream #0:0: Video: h264 (Main), yuv420p, 854x480, 1148 kb/s, 23.98
 tbr, 1k tbn, 47.95 tbc
     Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 129 kb/s
 [libx264 @ 0x1c19800] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
 SlowShuffle
 [libx264 @ 0x1c19800] profile High, level 2.1
 [libx264 @ 0x1c19800] 264 - core 130 r60 c832fe9 - H.264/MPEG-4 AVC codec
 - Copyleft 2003-2013 - 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=23
 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=800
 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
 Output #0, mp4, to 'side_by_side.mp4':
   Metadata:
     starttime       : 0
     totalduration   : 235
     totaldatarate   : 1256
     bytelength      : 36921553
     canseekontime   : true
     sourcedata      : BADC21B01HH1323804013818706
     purl            :
     pmsg            :
     encoder         : Lavf55.2.100
     Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x178,
 q=-1--1, 800 kb/s, 24k tbn, 23.98 tbc
     Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo,
 129 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> libx264)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 frame=  240 fps=106 q=-1.0 Lsize=    1137kB time=00:00:10.00 bitrate=
 930.5kbits/s
 video:973kB audio:155kB subtitle:0 global headers:0kB muxing overhead
 0.768025%
 [libx264 @ 0x1c19800] frame I:2     Avg QP:23.66  size: 18150
 [libx264 @ 0x1c19800] frame P:127   Avg QP:27.13  size:  6102
 [libx264 @ 0x1c19800] frame B:111   Avg QP:31.41  size:  1663
 [libx264 @ 0x1c19800] consecutive B-frames:  9.2% 86.7%  2.5%  1.7%
 [libx264 @ 0x1c19800] mb I  I16..4: 26.9% 38.6% 34.5%
 [libx264 @ 0x1c19800] mb P  I16..4:  3.8%  4.9%  2.3%  P16..4: 43.1% 18.2%
 15.9%  0.0%  0.0%    skip:11.7%
 [libx264 @ 0x1c19800] mb B  I16..4:  0.5%  1.6%  0.3%  B16..8: 40.3%  8.3%
 2.9%  direct: 8.1%  skip:37.9%  L0:47.6% L1:37.6% BI:14.8%
 [libx264 @ 0x1c19800] final ratefactor: 23.60
 [libx264 @ 0x1c19800] 8x8 transform intra:47.1% inter:59.2%
 [libx264 @ 0x1c19800] coded y,uvDC,uvAC intra: 50.4% 41.2% 15.9% inter:
 38.3% 28.8% 10.8%
 [libx264 @ 0x1c19800] i16 v,h,dc,p: 76% 12%  4%  8%
 [libx264 @ 0x1c19800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 16% 23%  4%  3%
 3%  5%  5%  8%
 [libx264 @ 0x1c19800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 29% 10%  5%  4%
 4%  5%  5%  7%
 [libx264 @ 0x1c19800] i8c dc,h,v,p: 68% 15% 14%  3%
 [libx264 @ 0x1c19800] Weighted P-Frames: Y:9.4% UV:8.7%
 [libx264 @ 0x1c19800] ref P L0: 40.8% 13.1% 26.9% 16.6%  2.6%
 [libx264 @ 0x1c19800] ref B L0: 66.7% 33.1%  0.2%
 [libx264 @ 0x1c19800] ref B L1: 98.8%  1.2%
 [libx264 @ 0x1c19800] kb/s:795.90


 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2465>
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