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• Invalid image height when converting a specific (seemingly valid) GIF to an mp4

  3 février 2020, par joe

  I’ve come across a weird GIF file on the internet that ffmpeg doesn’t seem to like. Try running the following commands :

  curl http://images6.fanpop.com/image/photos/34300000/Klaus-The-Originals-klaus-34349255-120-113.gif > input.gif
  
  ffmpeg -y -i input.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" output.mp4

  I get the following output with ffmpeg version 3.4.6 and 4.1.3 :

  ffmpeg version 4.1.3-0ubuntu1 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 8 (Ubuntu 8.3.0-6ubuntu1)
  
    configuration: --prefix=/usr --extra-version=0ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, gif, from 'a.gif':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: gif, bgra, 120x113, 5 fps, 5 tbr, 100 tbn, 100 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (gif (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x5613f5420c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x5613f5420c80] profile High, level 1.0
  
  [libx264 @ 0x5613f5420c80] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=3 lookahead_threads=1 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=5 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
  
  Output #0, mp4, to 'o.mp4':
  
    Metadata:
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 120x112, q=-1--1, 5 fps, 10240 tbn, 5 tbc
  
      Metadata:
  
        encoder         : Lavc58.35.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [gif @ 0x5613f540edc0] Invalid image height.
  
  Error while decoding stream #0:0: Invalid data found when processing input
  
  [mp4 @ 0x5613f541f380] Starting second pass: moving the moov atom to the beginning of the file
  
  frame=    1 fps=0.0 q=23.0 Lsize=       3kB time=00:00:00.00 bitrate=253795.9kbits/s speed=0.0245x    
  
  video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 34.588745%
  
  [libx264 @ 0x5613f5420c80] frame I:1     Avg QP:21.16  size:  1622
  
  [libx264 @ 0x5613f5420c80] mb I  I16..4: 14.3% 42.9% 42.9%
  
  [libx264 @ 0x5613f5420c80] 8x8 transform intra:42.9%
  
  [libx264 @ 0x5613f5420c80] coded y,uvDC,uvAC intra: 67.9% 41.1% 33.9%
  
  [libx264 @ 0x5613f5420c80] i16 v,h,dc,p: 25% 38% 25% 12%
  
  [libx264 @ 0x5613f5420c80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  8% 58% 18%  2%  3%  3%  1%  4%  2%
  
  [libx264 @ 0x5613f5420c80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 29% 15%  7%  7%  6%  5%  4%  3%
  
  [libx264 @ 0x5613f5420c80] i8c dc,h,v,p: 77%  5% 16%  2%
  
  [libx264 @ 0x5613f5420c80] kb/s:64.88
  
  Conversion failed!

  I’m a newbie with ffmpeg, but as far as I understand, the -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" scales the image so that it height and width are even numbers (needed for mp4 file format), so that should prevent this sort of error from occurring ?

  This looks very similar to this issue over at trac.ffmpeg.org, which has apparently been fixed.

• Revision e956c00762 : Set and use uv_crop_[width|height] Ensure consistent border extension by roundi

  16 juillet 2014, par Johann

  Changed Paths :
   Modify /vpx_scale/generic/yv12config.c

  
   Modify /vpx_scale/generic/yv12extend.c

  
  
  Set and use uv_crop_width

  Ensure consistent border extension by rounding uv_crop_* at image
  creation time. Where it was rounded problems could arise with the right
  and bottom extensions.
  When padding = 32, y_width = 64, and y_crop_width = 63 :
  (padding + width - crop_width + 1) / 2
  32 + 64 - 63 + 1 should equal 32 *but*
  32 + 1 + 1 equals 34 giving a right buffer of 17 instead of 16.
  By calculating uv_crop_* earlier we round up at the appropriate time and
  for the same values :
  (y_crop_width + 1) / 2
  63 + 1 / 2
  64
  (padding / 2) + uv_width - uv_crop_width
  16 + 16 - 16
  16

  Change-Id : If866cd1b63444771440edb1432280ac83875969b

• avcodec/v4l2_buffers : read height/width from the proper context

  30 août 2019, par Aman Gupta

  avcodec/v4l2_buffers : read height/width from the proper context
  Frames are generally dequeued into capture buffers, so using
  
  the output properties here was incorrect. It happened to work
  
  fine for decoding, since the output/capture buffers have the same
  
  dimensions.
  For the v4l2 scaler, the dimensions can be different between output
  
  and capture. Using the buffer's associated context makes this code
  
  work correctly regardless of where the frame is coming from.
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  

  • [DH] libavcodec/v4l2_buffers.c