[FFmpeg-trac] #9937(undetermined:new): libkvazaar encoder produces no output

[FFmpeg]

#9937: libkvazaar encoder produces no output
-------------------------------------+-------------------------------------
             Reporter:  Jozef        |                     Type:  defect
  Chutka                             |
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  libkvazaar   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Using BtbN ffmpeg version N-108232-g79845ce6cf-20220920 Copyright (c)
 2000-2022 the FFmpeg developers

 I am not able to make libkvazaar work:

 {{{
 ffmpeg -filter_complex "smptehdbars=size=400x120:rate=30:duration=10" -c:v
 libkvazaar -y out.mp4
 }}}

 out.mp4 is 44 bytes file (empty mp4 box I guess?)

 {{{
 ffmpeg -filter_complex "smptehdbars=size=400x120:rate=30:duration=10" -c:v
 libkvazaar -y out.mp4
 ffmpeg version N-108232-g79845ce6cf-20220920 Copyright (c) 2000-2022 the
 FFmpeg developers
   built with gcc 12.1.0 (crosstool-NG 1.25.0.55_3defb7b)
   configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
 --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
 --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
 --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
 --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib
 --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth
 --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-
 ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
 libkvazaar --enable-libass --enable-libbluray --enable-libjxl --enable-
 libmp3lame --enable-libopus --enable-librist --enable-libssh --enable-
 libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-
 librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-
 libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d
 --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan
 --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265
 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi
 --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-
 ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-
 version=20220920
   libavutil      57. 36.102 / 57. 36.102
   libavcodec     59. 44.100 / 59. 44.100
   libavformat    59. 32.100 / 59. 32.100
   libavdevice    59.  8.101 / 59.  8.101
   libavfilter     8. 49.100 /  8. 49.100
   libswscale      6.  8.112 /  6.  8.112
   libswresample   4.  9.100 /  4.  9.100
   libpostproc    56.  7.100 / 56.  7.100
 Stream mapping:
   smptehdbars:default -> Stream #0:0 (libkvazaar)
 Press [q] to stop, [?] for help
 Compiled: INTEL, flags: MMX SSE SSE2 SSSE3 SSE41 SSE42
 Detected: INTEL, flags: MMX SSE SSE2 SSE3 SSSE3 SSE41 SSE42 AVX AVX2
 Available: avx(11) avx2(54) sse2(2) sse41(4)
 In use: avx(1) avx2(54)
 --owf=auto value set to 4.
 --threads=auto value set to 4.
 Output #0, mp4, to 'out.mp4':
   Metadata:
     encoder         : Lavf59.32.100
   Stream #0:0: Video: hevc (hev1 / 0x31766568),
 yuv420p(bt709/unknown/unknown, progressive), 400x120 [SAR 1:1 DAR 10:3],
 q=2-31, 30 fps, 15360 tbn
     Metadata:
       encoder         : Lavc59.44.100 libkvazaar
 frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=
 -0.0kbits/s speed=N/A
 c:\Users\Jozef\Work\Private\wide.video\app-poc\ffmpeg-libkvazaar>
 }}}

 I have also tried re-ecndoing an existing video, or different `kvazaar-
 params` but with the same result.

 Is there any extra argument to be used or the encoder is broken?
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9937>
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