[FFmpeg-trac] #4079(undetermined:new): Screen capture with AV Foundation has an extra pixel width when cropping

[FFmpeg]

#4079: Screen capture with AV Foundation has an extra pixel width when cropping
---------------------------------+----------------------------------------
             Reporter:  LordHDL  |                    Owner:
                 Type:  defect   |                   Status:  new
             Priority:  normal   |                Component:  undetermined
              Version:  2.4.3    |               Resolution:
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+----------------------------------------

Comment (by LordHDL):

 It shows for both.  Full screen image (look at the left edge):
 https://www.dropbox.com/s/ho2imusdl325k5e/Full%20screen.png?dl=0

 However there is a difference on the console output that I noticed between
 the two.  The 2nd command shows this:

 {{{
 [swscaler @ 0x7ffae2007800] Warning: data is not aligned! This can lead to
 a speedloss
 [mpeg4 @ 0x7ffae2002800] ignoring invalid SAR: 0/0
 }}}

 Full command:

 {{{
 Last login: Tue Nov  4 15:09:54 on ttys001
 HDLs-MacBook-Pro:~ HDL$ cd ~/Desktop
 HDLs-MacBook-Pro:Desktop HDL$ ./ffmpeg -i out.nut -c:v mpeg4 -qscale 2 -vf
 crop=426:240:507:339 out.avi
 ffmpeg version N-67454-g0971154-tessus Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Nov  3 2014 23:27:57 with Apple LLVM version 6.0
 (clang-600.0.54) (based on LLVM 3.5svn)
   configuration: --cc=/usr/bin/clang
 --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus
 --disable-shared --enable-static --disable-ffplay --enable-gpl --enable-
 pthreads --enable-postproc --enable-libmp3lame --enable-libtheora
 --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid
 --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libxavs --enable-libsoxr --enable-
 libwavpack --enable-version3 --enable-libvo-aacenc --enable-libvo-amrwbenc
 --enable-libvpx --enable-libgsm --enable-libopus --enable-libmodplug
 --enable-fontconfig --enable-libfreetype --enable-libass --enable-
 libbluray --enable-filters --disable-indev=qtkit --disable-
 indev=x11grab_xcb --enable-runtime-cpudetect
   libavutil      54. 11.100 / 54. 11.100
   libavcodec     56. 10.102 / 56. 10.102
   libavformat    56. 12.100 / 56. 12.100
   libavdevice    56.  2.100 / 56.  2.100
   libavfilter     5.  2.102 /  5.  2.102
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, nut, from 'out.nut':
   Metadata:
     encoder         : Lavf56.12.100
   Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (Y42B / 0x42323459), yuv422p, 426x240,
 1000k tbr, 1000k tbn, 1000k tbc
     Metadata:
       encoder         : Lavc56.10.102 rawvideo
     Stream #0:1: Audio: vorbis (oV[0][0] / 0x566F), 44100 Hz, stereo, fltp
     Metadata:
       encoder         : Lavc56.10.102 libvorbis
 Please use -q:a or -q:v, -qscale is ambiguous
 File 'out.avi' already exists. Overwrite ? [y/N] y
 [avi @ 0x7ffae2001c00] Frame rate very high for a muxer not efficiently
 supporting it.
 Please consider specifying a lower framerate, a different muxer or -vsync
 2
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf56.12.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 426x240,
 q=2-31, 200 kb/s, 65535 fps, 600 tbn, 65535 tbc
     Metadata:
       encoder         : Lavc56.10.102 mpeg4
     Stream #0:1: Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz,
 stereo, fltp
     Metadata:
       encoder         : Lavc56.10.102 libmp3lame
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
   Stream #0:1 -> #0:1 (vorbis (native) -> mp3 (libmp3lame))
 Press [q] to stop, [?] for help
 [swscaler @ 0x7ffae2007800] Warning: data is not aligned! This can lead to
 a speedloss
 [mpeg4 @ 0x7ffae2002800] ignoring invalid SAR: 0/0
     Last message repeated 2 times
 frame=    1 fps=0.0 q=2.0 Lsize=      86kB time=00:00:00.00 bitrate=N/A
 video:76kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 12.708453%
 HDLs-MacBook-Pro:Desktop HDL$
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4079#comment:8>
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