[FFmpeg-trac] #5726(avfilter:new): zoompan filter outputs shaky vidoe

FFmpeg trac at avcodec.org
Wed Jul 20 17:04:53 EEST 2016


#5726: zoompan filter outputs shaky vidoe
----------------------------------+---------------------------------------
             Reporter:  jammy     |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avfilter  |                  Version:  unspecified
             Keywords:  zoompan   |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
----------------------------------+---------------------------------------
 Adding a zoompan filter to an image with no panning works smoothly,
 however when panning the zoom to the center of the image, the result is a
 video with a shaky image.
 I have used the same filter example as shown in the [https://ffmpeg.org
 /ffmpeg-all.html#Examples-123 zoompan filter documentation].

 This is the command line:
 {{{
 ffmpeg -y \
 -i img.jpg \
 -filter_complex
 "zoompan=z='min(zoom+0.0015,1.5)':d=125:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)'"
 \
 -vcodec libx264 -pix_fmt yuv420p -r 25 -t 5 out.mp4
 }}}

 Below is the console output. I have also attached the full console output,
 input image and the output video.

 {{{
 ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers
   built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.1) 20160609
   configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora
 --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree
 --enable-postproc --enable-version3 --enable-x11grab --enable-shared
 --enable-libvpx --enable-pic --enable-zlib
   libavutil      55. 28.100 / 55. 28.100
   libavcodec     57. 48.101 / 57. 48.101
   libavformat    57. 41.100 / 57. 41.100
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 47.100 /  6. 47.100
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  1.100 /  2.  1.100
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, image2, from 'img.jpg':
   Duration: 00:00:00.04, start: 0.000000, bitrate: 28100 kb/s
     Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown),
 1024x640 [SAR 72:72 DAR 8:5], 25 tbr, 25 tbn, 25 tbc
 [swscaler @ 0x109f380] deprecated pixel format used, make sure you did set
 range correctly
 [libx264 @ 0x1083e00] using SAR=1/1
 [libx264 @ 0x1083e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
 AVX FMA3 AVX2 LZCNT BMI2
 [libx264 @ 0x1083e00] profile High, level 3.1
 [libx264 @ 0x1083e00] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC
 codec - Copyleft 2003-2015 - 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=12
 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=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
 [mp4 @ 0x1081ae0] Using AVStream.codec to pass codec parameters to muxers
 is deprecated, use AVStream.codecpar instead.
 Output #0, mp4, to 'out.mp4':
   Metadata:
     encoder         : Lavf57.41.100
     Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.48.101 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
 Stream mapping:
   Stream #0:0 (mjpeg) -> zoompan
   zoompan -> Stream #0:0 (libx264)
 Press [q] to stop, [?] for help
 [swscaler @ 0x172e040] Warning: data is not aligned! This can lead to a
 speedloss
 frame=  125 fps= 91 q=-1.0 Lsize=     642kB time=00:00:04.88
 bitrate=1077.5kbits/s speed=3.55x
 video:640kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.356806%
 [libx264 @ 0x1083e00] frame I:1     Avg QP:20.29  size:121874
 [libx264 @ 0x1083e00] frame P:31    Avg QP:20.53  size: 13035
 [libx264 @ 0x1083e00] frame B:93    Avg QP:26.16  size:  1380
 [libx264 @ 0x1083e00] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%
 [libx264 @ 0x1083e00] mb I  I16..4:  8.7% 75.8% 15.6%
 [libx264 @ 0x1083e00] mb P  I16..4:  0.1%  0.1%  0.0%  P16..4: 45.1% 11.9%
 8.7%  0.0%  0.0%    skip:34.1%
 [libx264 @ 0x1083e00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 34.5%  0.4%
 0.1%  direct: 0.3%  skip:64.7%  L0:48.9% L1:49.3% BI: 1.9%
 [libx264 @ 0x1083e00] 8x8 transform intra:73.4% inter:78.3%
 [libx264 @ 0x1083e00] coded y,uvDC,uvAC intra: 74.2% 87.0% 68.3% inter:
 4.7% 11.5% 3.8%
 [libx264 @ 0x1083e00] i16 v,h,dc,p:  4% 42%  5% 49%
 [libx264 @ 0x1083e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 28% 15%  5%  9%
 6% 12%  5% 10%
 [libx264 @ 0x1083e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 22% 10%  7% 12%
 8% 12%  7%  9%
 [libx264 @ 0x1083e00] i8c dc,h,v,p: 43% 33% 10% 14%
 [libx264 @ 0x1083e00] Weighted P-Frames: Y:0.0% UV:0.0%
 [libx264 @ 0x1083e00] ref P L0: 61.6%  7.9% 12.2% 18.2%
 [libx264 @ 0x1083e00] ref B L0: 79.5% 16.7%  3.8%
 [libx264 @ 0x1083e00] ref B L1: 91.0%  9.0%
 [libx264 @ 0x1083e00] kb/s:1046.86
 }}}

 I also receive this warning in the console output.
 {{{[swscaler @ 0x172e040] Warning: data is not aligned! This can lead to a
 speedloss}}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5726>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


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