[FFmpeg-user] Error in aeval?

[Michael Koch]

This command line works as expected:

ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*sin(2)*sin(2)" -ac 2 -t 5 
-y out.wav


Why does it no longer work when I replace sin(2)*sin(2)  by pow(sin(2),2)  ?

ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*pow(sin(2),2)" -ac 2 -t 5 
-y out.wav

Is this a bug? The console output is below.

Michael


C:\Users\astro\Desktop\Mosquito>ffmpeg -f lavfi -i 
sine,aeval="val(0)|val(0)*pow(sin(2),2)" -ac 2 -t 5 -y out.wav
ffmpeg version 2022-10-24-git-d79c240196-full_build-www.gyan.dev 
Copyright (c) 2000-2022 the FFmpeg developers
   built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
   configuration: --enable-gpl --enable-version3 --enable-static 
--disable-w32threads --disable-autodetect --enable-fontconfig 
--enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp 
--enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib 
--enable-librist --enable-libsrt --enable-libssh --enable-libzmq 
--enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 
--enable-libaribb24 --enable-libdav1d --enable-libdavs2 
--enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 
--enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg 
--enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r 
--enable-libfreetype --enable-libfribidi --enable-liblensfun 
--enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf 
--enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec 
--enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl 
--enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl 
--enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt 
--enable-libopencore-amrwb --enable-libmp3lame --enable-libshine 
--enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc 
--enable-libilbc --enable-libgsm --enable-libopencore-amrnb 
--enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa 
--enable-libbs2b --enable-libflite --enable-libmysofa 
--enable-librubberband --enable-libsoxr --enable-chromaprint
   libavutil      57. 39.101 / 57. 39.101
   libavcodec     59. 51.100 / 59. 51.100
   libavformat    59. 34.101 / 59. 34.101
   libavdevice    59.  8.101 / 59.  8.101
   libavfilter     8. 49.101 /  8. 49.101
   libswscale      6.  8.112 /  6.  8.112
   libswresample   4.  9.100 /  4.  9.100
   libpostproc    56.  7.100 / 56.  7.100
[Parsed_aeval_1 @ 000002d8c2939000] [Eval @ 000000f7499fe440] Missing 
')' or too many args in 'pow(sin(2)'
[lavfi @ 000002d8c29261c0] Error initializing filter 'aeval' with args 
'val(0)|val(0)*pow(sin(2)'
sine,aeval=val(0)|val(0)*pow(sin(2),2): Invalid argument