*.aac was not created!

[Selur]

Okay, it's a problem with ffmpeg decoding the extracted audio.
Hybrid used:

"C:\Program Files\Hybrid\64bit\ffmpeg.exe" -y -threads 12 -i "H:\!_gotovo\no\Jessie J Ariana Grande [iHeartRadio Jingle Ball 2014 (N).mkv" -map 0:1 -vn -sn -acodec copy -map_metadata -1 -metadata encoding_tool="Hybrid 2020.12.13.1" "C:\Windows\Temp\iId_5_aid_0_DELAY_-53ms_2021-01-10@23_06_59_6010_01.aac"

to extract the audio.
And I don't see any error in the debug output for that:

ffmpeg version N-100400-g5f7dc836ce-gd76469378d+4 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration:  --pkg-config=pkgconf --cc='ccache gcc' --cxx='ccache g++' --disable-autodetect --enable-amf --enable-bzlib --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-iconv --enable-lzma --enable-nvenc --enable-zlib --enable-sdl2 --enable-ffnvcodec --enable-nvdec --enable-cuda-llvm --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libdav1d --disable-debug --enable-fontconfig --enable-libass --enable-libbluray --enable-libfreetype --enable-libmfx --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libshine --enable-gpl --enable-avisynth --enable-libxvid --enable-libaom --enable-libopenmpt --enable-version3 --enable-libsvthevc --enable-libsvtav1 --enable-libkvazaar --enable-libzmq --enable-libvmaf --enable-vapoursynth --disable-libdavs2 --enable-librav1e --enable-mbedtls --extra-cflags=-DLIBTWOLAME_STATIC --extra-libs=-lstdc++ --extra-cflags=-DZMQ_STATIC --extra-cflags=-DLIBXML_STATIC --extra-libs=-liconv --disable-w32threads --extra-cflags=-DKVZ_STATIC_LIB
  libavutil      56. 62.100 / 56. 62.100
  libavcodec     58.115.102 / 58.115.102
  libavformat    58. 65.100 / 58. 65.100
  libavdevice    58. 11.103 / 58. 11.103
  libavfilter     7. 93.100 /  7. 93.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100

Input #0, matroska,webm, from 'H:\!_gotovo\no\Jessie J Ariana Grande [iHeartRadio Jingle Ball 2014 (N).mkv':
  Metadata:
    encoder         : TMPGEnc MPEG Smart Renderer 5 Trial Version 5.0.21.27
    creation_time   : 2019-11-10T23:17:33.976000Z
  Duration: 00:03:20.79, start: 0.000000, bitrate: 8608 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
    Stream #0:1: Audio: aac (LC), 48000 Hz, 5.1, fltp (default)

Output #0, adts, to 'C:\Windows\Temp\iId_5_aid_0_DELAY_-53ms_2021-01-10@23_06_59_6010_01.aac':
  Metadata:
    encoding_tool   : "Hybrid 2020.12.13.1"
    encoder         : Lavf58.65.100
    Stream #0:0: Audio: aac (LC), 48000 Hz, 5.1, fltp (default)
Stream mapping:
  Stream #0:1 -> #0:0 (copy)
Press [q] to stop, [?] for help

size=   15751kB time=00:03:20.76 bitrate= 642.7kbits/s speed=1.44e+03x    
video:0kB audio:15687kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.410153%
finished after 00:00:00.256
created C:\Windows\Temp\iId_5_aid_0_DELAY_-53ms_2021-01-10@23_06_59_6010_01.aac (15.382 MB)

Problem is, if ffmpeg can't decode the extracted audio I can't do anything about it.

This line

encoding audio to aac using ffmpeg

is right?

If ffmpeg is used: yes.
Doesn't appear in the debug output.

Cu Selur