[FFmpeg-trac] #10962(undetermined:new): Unable to create transparent avif with libsvtav1

[FFmpeg]

#10962: Unable to create transparent avif with libsvtav1
--------------------------------------+----------------------------------
             Reporter:  Jozef Chutka  |                     Type:  defect
               Status:  new           |                 Priority:  normal
            Component:  undetermined  |                  Version:  6.1.1
             Keywords:                |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
--------------------------------------+----------------------------------
 Summary of the bug:

 I am trying to produce transparent .avif using svt-av1, but the process
 fails with "Second stream for AVIF (alpha) output must have exactly one
 plane" which seems to be ffmpeg message.

 Interestingly the very same command works ok with aom-av1:

 How to reproduce:
 {{{
 ffmpeg -i colorkey.webp -filter_complex
 "[0]split[v][v1];[v1]alphaextract[v1]" -map "[v]" -map "[v1]" -f avif
 -vcodec libaom-av1 -y out.avif
 ffmpeg -i colorkey.webp -filter_complex
 "[0]split[v][v1];[v1]alphaextract[v1]" -map "[v]" -map "[v1]" -f avif
 -vcodec libsvtav1 -y out.avif
 }}}

 The first command works ok, the second one with libsvtav1 fails with:

 {{{
 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
 Input #0, webp_pipe, from 'colorkey.webp':
   Duration: N/A, bitrate: N/A
   Stream #0:0: Video: webp, yuva420p(tv, bt470bg/unknown/unknown),
 128x128, 25 fps, 25 tbr, 25 tbn
 Stream mapping:
   Stream #0:0 (webp) -> split:default
   split -> Stream #0:0 (libsvtav1)
   alphaextract:default -> Stream #0:1 (libsvtav1)
 Press [q] to stop, [?] for help
 Svt[info]: -------------------------------------------
 Svt[info]: SVT [version]:       SVT-AV1 Encoder Lib v1.8.0
 Svt[info]: SVT [build]  :       Apple LLVM 15.0.0 (clang-1500.1.0.2.5)
 64 bit
 Svt[info]: LIB Build date: Dec 14 2023 12:33:03
 Svt[info]: -------------------------------------------
 Svt[info]: Number of logical cores available: 8
 Svt[info]: Number of PPCS 107
 Svt[info]: [asm level on system : up to neon]
 Svt[info]: [asm level selected : up to neon]
 Svt[info]: -------------------------------------------
 Svt[info]: SVT [config]: main profile   tier (auto)     level (auto)
 Svt[info]: SVT [config]: width / height / fps numerator / fps denominator
 : 128 / 128 / 25 / 1
 Svt[info]: SVT [config]: bit-depth / color format
 : 8 / YUV420
 Svt[info]: SVT [config]: preset / tune / pred struct
 : 10 / PSNR / random access
 Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type
 : 161 / 32 / key frame
 Svt[info]: SVT [config]: BRC mode / rate factor
 : CRF / 35
 Svt[info]: -------------------------------------------
 Svt[info]: -------------------------------------------
 Svt[info]: SVT [version]:       SVT-AV1 Encoder Lib v1.8.0
 Svt[info]: SVT [build]  :       Apple LLVM 15.0.0 (clang-1500.1.0.2.5)
 64 bit
 Svt[info]: LIB Build date: Dec 14 2023 12:33:03
 Svt[info]: -------------------------------------------
 Svt[info]: Number of logical cores available: 8
 Svt[info]: Number of PPCS 107
 Svt[info]: [asm level on system : up to neon]
 Svt[info]: [asm level selected : up to neon]
 Svt[info]: -------------------------------------------
 Svt[info]: SVT [config]: main profile   tier (auto)     level (auto)
 Svt[info]: SVT [config]: width / height / fps numerator / fps denominator
 : 128 / 128 / 25 / 1
 Svt[info]: SVT [config]: bit-depth / color format
 : 8 / YUV420
 Svt[info]: SVT [config]: preset / tune / pred struct
 : 10 / PSNR / random access
 Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type
 : 161 / 32 / key frame
 Svt[info]: SVT [config]: BRC mode / rate factor
 : CRF / 35
 Svt[info]: -------------------------------------------
 [avif @ 0x15af35010] Second stream for AVIF (alpha) output must have
 exactly one plane
 [out#0/avif @ 0x15af34f50] Could not write header (incorrect codec
 parameters ?): Invalid argument
 Error while filtering: Invalid argument

 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10962>
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