[FFmpeg-trac] #10934(undetermined:new): FFmpeg does not recognize animated .webp it previously produced

[FFmpeg]

#10934: FFmpeg does not recognize animated .webp it previously produced
--------------------------------------+----------------------------------
             Reporter:  Jozef Chutka  |                     Type:  defect
               Status:  new           |                 Priority:  normal
            Component:  undetermined  |                  Version:  6.1
             Keywords:  webp          |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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 Using ffmpeg 6.1.1, there are many errors when animated .webp used as an
 input.

 {{{
 ffmpeg -i pixelate-animated.webp
 }}}

 {{{
 ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
   built with Apple clang version 15.0.0 (clang-1500.1.0.2.5)
   configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/6.1.1_4 --enable-
 shared --enable-pthreads --enable-version3 --cc=clang --host-cflags=
 --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-
 gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-
 libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame
 --enable-libopus --enable-librav1e --enable-librist --enable-librubberband
 --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1
 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-
 libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-
 libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma
 --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-
 libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
 libopenjpeg --enable-libopenvino --enable-libspeex --enable-libsoxr
 --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
 --enable-videotoolbox --enable-audiotoolbox --enable-neon
   libavutil      58. 29.100 / 58. 29.100
   libavcodec     60. 31.102 / 60. 31.102
   libavformat    60. 16.100 / 60. 16.100
   libavdevice    60.  3.100 / 60.  3.100
   libavfilter     9. 12.100 /  9. 12.100
   libswscale      7.  5.100 /  7.  5.100
   libswresample   4. 12.100 /  4. 12.100
   libpostproc    57.  3.100 / 57.  3.100
 [webp @ 0x140e046c0] skipping unsupported chunk: ANIM
 [webp @ 0x140e046c0] skipping unsupported chunk: ANMF
     Last message repeated 5 times
 [webp @ 0x140e046c0] image data not found
 [webp_pipe @ 0x150e3b240] Could not find codec parameters for stream 0
 (Video: webp, none): unspecified size
 Consider increasing the value for the 'analyzeduration' (0) and
 'probesize' (5000000) options
 Input #0, webp_pipe, from 'pixelate-animated.webp':
   Duration: N/A, bitrate: N/A
   Stream #0:0: Video: webp, none, 25 fps, 25 tbr, 25 tbn
 At least one output file must be specified
 }}}

 This source was previously produced by ffmpeg using the following output
 settings:
 {{{
 ... -f webp -loop 0 -vcodec webp -compression_level 6 -lossless 0 -q:v 70
 -pix_fmt yuv420p
 }}}

 ...and is validly rendered by i.e. chrome.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10934>
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