[FFmpeg-trac] #6387(undetermined:new): ffmpeg crashes when pad filter is incorrectly specified

[FFmpeg]

#6387: ffmpeg crashes when pad filter is incorrectly specified
-------------------------------------+-------------------------------------
             Reporter:  Rollinnn     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 I tried to resize videos using command -vf "scale=800:-1,
 pad=800:480:x=-1:y=-1" But height of some videos become lagrer than 480.
 So ffmpeg tries to begin encoding, but just crashes. Probably it should
 give out error about incorrect parameters, but not crash.
 How to reproduce:
 {{{
 G:\1_DVDs and Videos>ffmpeg -ss 00:10 -i "G:\1_DVDs and
 Videos\incorrectly_speci
 fied_pad_crashes.avi" -to 00:30 -map 0:0 -vf "scale=800:-1,
 pad=800:480:x=-1:y=-
 1" -vcodec libx264 -crf 0 -preset ultrafast -an -map_chapters -1
 -map_metadata -
 1 "G:\1_DVDs and Videos\incorrectly_specified_pad_crashes--.mkv"
 ffmpeg version N-85604-g207e6de Copyright (c) 2000-2017 the FFmpeg
 developers
   built with gcc 6.3.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-cuda --enable-
 cuvid --e
 nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-
 avisynth --
 enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-
 iconv
 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
 --enable-li
 bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-
 libmodplug -
 -enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
 --enabl
 e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp
 --enable-li
 bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-
 libtwolam
 e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-
 libvpx
  --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
 --enable
 -libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
   libavutil      55. 61.100 / 55. 61.100
   libavcodec     57. 93.100 / 57. 93.100
   libavformat    57. 72.101 / 57. 72.101
   libavdevice    57.  7.100 / 57.  7.100
   libavfilter     6. 86.100 /  6. 86.100
   libswscale      4.  7.101 /  4.  7.101
   libswresample   2.  8.100 /  2.  8.100
   libpostproc    54.  6.100 / 54.  6.100
 Input #0, avi, from 'G:\1_DVDs and
 Videos\incorrectly_specified_pad_crashes.avi'
 :
   Metadata:
     encoder         : Lavf57.72.101
   Duration: 00:00:10.01, start: 0.000000, bitrate: 201 kb/s
     Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID /
 0x44495658), yuv
 420p, 720x536 [SAR 1:1 DAR 90:67], 52 kb/s, 29.97 fps, 29.97 tbr, 29.97
 tbn, 29.
 98 tbc
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16p,
 128 k
 b/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
 Press [q] to stop, [?] for help
 [mpeg4 @ 03f75940] Video uses a non-standard and wasteful way to store
 B-frames
 ('packed B-frames'). Consider using the mpeg4_unpack_bframes bitstream
 filter wi
 thout encoding but stream copy to fix it.
 [libx264 @ 03f53700] using SAR=1341/1340
 [libx264 @ 03f53700] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
 AVX
 [libx264 @ 03f53700] profile High 4:4:4 Predictive, level 3.1, 4:2:0 8-bit
 [libx264 @ 03f53700] 264 - core 148 r2762 90a61ec - H.264/MPEG-4 AVC codec
 - Cop
 yleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0
 ref=1 deb
 lock=0:0:0 analyse=0:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16
 chroma_me=1
 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0
 threads=
 6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
 bluray_compa
 t=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25
 scenecut=0
 intra_refresh=0 rc=cqp mbtree=0 qp=0
 Output #0, matroska, to 'G:\1_DVDs and
 Videos\incorrectly_specified_pad_crashes-
 -.mkv':
   Metadata:
     encoder         : Lavf57.72.101
     Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv420p,
 800x480 [SA
 R 1341:1340 DAR 447:268], q=-1--1, 29.97 fps, 1k tbn, 29.97 tbc
     Metadata:
       encoder         : Lavc57.93.100 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6387>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker