[FFmpeg-trac] #2151(swscale:new): Warning: data is not aligned! This can lead to a speedloss

[FFmpeg]

#2151: Warning: data is not aligned! This can lead to a speedloss
---------------------------------+----------------------------------
             Reporter:  viric    |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  swscale  |                  Version:  1.1
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+----------------------------------
 Summary of the bug:

 How to reproduce:
 {{{
 % ffmpeg -ss 01:05:30 -i album-familiar-1.mkv -t 00:07:28 -vf "yadif,
 crop=690:560:16" -vcodec mpeg4 -vtag xvid  -qscale:v 4 -ac 1 -acodec
 libmp3lame -qscale:a 3 /tmp/tieta2.avi
 ffmpeg version 1.1 Copyright (c) 2000-2013 the FFmpeg developers
   built on Jan 13 2013 22:22:02 with gcc 4.6.3 (GCC)
   configuration: --disable-static --prefix=/nix/store
 /1pja3gxi62f2hjwyww67ys84mxqfjgwm-ffmpeg-1.1 --enable-gpl --enable-
 postproc --enable-swscale --disable-ffplay --enable-shared --enable-
 runtime-cpudetect --enable-libmp3lame --enable-libspeex --enable-libtheora
 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid
 --enable-vdpau
   libavutil      52. 13.100 / 52. 13.100
   libavcodec     54. 86.100 / 54. 86.100
   libavformat    54. 59.106 / 54. 59.106
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 32.100 /  3. 32.100
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, matroska,webm, from 'album-familiar-1.mkv':
   Metadata:
     ENCODER         : Lavf54.59.106
   Duration: 03:04:49.44, start: 0.000000, bitrate: 65334 kb/s
     Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv422p, 720x576,
 SAR 1:1 DAR 5:4, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
     Stream #0:1: Audio: flac, 44100 Hz, stereo, s16 (default)
 Output #0, avi, to '/tmp/tieta2.avi':
   Metadata:
     ISFT            : Lavf54.59.106
     Stream #0:0: Video: mpeg4 (xvid / 0x64697678), yuv420p, 690x560 [SAR
 1:1 DAR 69:56], q=2-31, 200 kb/s, 25 tbn, 25 tbc (default)
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, mono, s16p
 (default)
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> mpeg4)
   Stream #0:1 -> #0:1 (flac -> libmp3lame)
 Press [q] to stop, [?] for help
 [swscaler @ 0x752040] Warning: data is not aligned! This can lead to a
 speedloss
 frame=    6 fps=0.0 q=4.0 Lsize=      91kB time=00:00:00.24
 bitrate=3118.7kbits/s dup=0 drop=7
 video:75kB audio:6kB subtitle:0 global headers:0kB muxing overhead
 12.867035%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2151>
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