[FFmpeg-trac] #2981(swscale:new): No support for jpeg with 1pixel width

[FFmpeg]

#2981: No support for jpeg with 1pixel width
---------------------------------+--------------------------------------
             Reporter:  cyril    |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  swscale  |                  Version:  git-master
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+--------------------------------------
 Summary of the bug: It doesn't seem like FFmpeg handle safely jpeg with 1
 pixel width. After a call to sws_scale(), the buffer passed as the "dst"
 parameter isn't safe anymore and cannot be freed thereafter.
 FFplay seems to reproduce the same issue because it cannot even display
 the jpeg file.

 How to reproduce:
 {{{
 % ffplay.exe root_banner.jpg
 ffplay version N-56525-g5b153f8 Copyright (c) 2003-2013 the FFmpeg
 developers
   built on Sep 21 2013 00:42:32 with gcc 4.7.3 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-av
 isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
 --enab
 le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-
 libfreetyp
 e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
 --ena
 ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-l
 ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
 --enable-libsp
 eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-
 libvo-aa
 cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-
 libwavp
 ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
   libavutil      52. 45.100 / 52. 45.100
   libavcodec     55. 33.100 / 55. 33.100
   libavformat    55. 18.102 / 55. 18.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 86.102 /  3. 86.102
   libswscale      2.  5.100 /  2.  5.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, image2, from '..\root_banner.jpg':  0KB sq=    0B f=0/0
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: mjpeg, yuvj420p(pc), 1x60 [SAR 96:96 DAR 1:60], 25
 tbr,
 25 tbn, 25 tbc
 [swscaler @ 0000000002864fe0] deprecated pixel format used, make sure you
 did se
 t range correctly
 [ffplay_crop @ 0000000002850e40] Invalid too big or non positive size for
 width
 '0' or height '60'
 [auto-inserted scaler 0 @ 00000000028452c0] Failed to configure input pad
 on ffp
 lay_crop
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2981>
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