"codec_name": "aac",
            "codec_long_name": "AAC (Advanced Audio Coding)",
            "profile": "-1",
            "codec_type": "audio",
            "codec_tag_string": "mp4a",
            "codec_tag": "0x6134706d",
            "sample_fmt": "fltp",
            "sample_rate": "48000",
            "channels": 4,
            "channel_layout": "4.0",
            "bits_per_sample": 0,
            "initial_padding": 0,
            "id": "0x1",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/48000",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 102384,
            "duration": "2.133000",
            "bit_rate": "265269",
            "nb_frames": "101",

[aac @ 000001985320ec40] channel element 1.0 is not allocated
[aac @ 000001985320ec40] channel element 1.0 is not allocated

➜  qtbase git:(d2ed6a3d73) /Users/tim/build/qt-dev-xc15-Debug/qtmultimedia/tests/manual/minimal-audio-recorder/minimal-audio-recorder.app/Contents/MacOS/minimal-audio-recorder tst.aac
Available HW decoding frameworks:
     videotoolbox
Available HW encoding frameworks:
     videotoolbox
Available audio devices:
ID "BuiltInMicrophoneDevice" Description "MacBook Pro Microphone"
ID "EQMDevice" Description "eqMac"
ID "MSLoopbackDriverDevice_UID" Description "Microsoft Teams Audio"
Using default device
qt.multimedia.ffmpeg.audioencoder: AudioEncoder QMediaFormat::AudioCodec::AAC
Recording 5 seconds of audio to "/Users/tim/Music/tst.aac"
qt.multimedia.ffmpeg.audioencoder: set stream time_base 1 / 48000
qt.multimedia.ffmpeg.audioencoder: audio codec params: fmt= 8 rate= 48000
qt.multimedia.ffmpeg.audioencoder: found audio codec aac
qt.multimedia.ffmpeg.audioencoder: Created resampler with audio formats conversion
 [ sample format: flt , sample rate: 48000 , channel layout: [ nb_channels: 1 , order: 1 , mask: 100 ] ] -> [ sample format: fltp , sample rate: 48000 , channel layout: [ nb_channels: 1 , order: 1 , mask: 100 ] ]
Recording completed
[aac @ 0x7fce5e20fc40] Qavg: 120.107
➜  qtbase git:(d2ed6a3d73) ffprobe /Users/tim/Music/tst.aac
ffprobe version 7.0.2 Copyright (c) 2007-2024 the FFmpeg developers
  built with Apple clang version 15.0.0 (clang-1500.3.9.4)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/7.0.2 --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-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox
  libavutil      59.  8.100 / 59.  8.100
  libavcodec     61.  3.100 / 61.  3.100
  libavformat    61.  1.100 / 61.  1.100
  libavdevice    61.  1.100 / 61.  1.100
  libavfilter    10.  1.100 / 10.  1.100
  libswscale      8.  1.100 /  8.  1.100
  libswresample   5.  1.100 /  5.  1.100
  libpostproc    58.  1.100 / 58.  1.100
[aac @ 0x7fba55b04100] Format aac detected only with low score of 1, misdetection possible!
[aac @ 0x7fba55b04c00] More than one AAC RDB per ADTS frame is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[aac @ 0x7fba55b04c00] Reserved bit set.
[aac @ 0x7fba55b04c00] Number of bands (10) exceeds limit (6).
[aac @ 0x7fba55b04c00] channel element 1.14 is not allocated
[aac @ 0x7fba55b04c00] channel element 2.11 is not allocated
[aac @ 0x7fba55b04c00] channel element 3.5 is not allocated
[aac @ 0x7fba55b04100] Estimating duration from bitrate, this may be inaccurate
[aac @ 0x7fba55b04100] Could not find codec parameters for stream 0 (Audio: aac (LTP), mono, fltp, 418 kb/s): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, aac, from '/Users/tim/Music/tst.aac':
  Duration: 00:00:00.73, bitrate: 436 kb/s
  Stream #0:0: Audio: aac (LTP), mono, fltp, 418 kb/s