FastFlix 6.1.2 (ArchLinux\AUR) fails to start: OOM crash

[cinnamonmatexfce]

• logs = oom-kill (FastFlix.journalctl.txt), FastFlix (FastFlix.log.txt)
• distro = ArchLinux
• package = AUR

  pacman -Qs fastflix
  local/fastflix 6.2.1-1
      Simple and friendly GUI for encoding videos
  

• issue = ERROR Could not create GUI Process
• Python =

  pacman -Qs '^python'
  local/distro-info 1.15-1
      Information about all releases of Debian and Ubuntu
  local/python 3.14.4-1
      The Python programming language
  local/python-attrs 26.1.0-1
      Attributes without boilerplate.
  local/python-binaryornot 0.6.0-1
      Ultra-lightweight pure Python package to check if a file is binary or text
  local/python-boolean.py 5.0-2
      Implements boolean algebra in one module
  local/python-cffi 2.0.0-2
      Foreign Function Interface for Python calling C code
  local/python-chardet 6.0.0.post1-1
      Universal encoding detector for Python
  local/python-click 8.3.3-1
      Simple wrapper around optparse for powerful command line utilities
  local/python-configobj 5.0.9-6
      Simple config file reader and writer
  local/python-cryptography 47.0.0-1
      A package designed to expose cryptographic recipes and primitives to Python developers
  local/python-debian 1.1.0-1
      Python module to work with Debian-related data formats
  local/python-defusedxml 0.7.1-8
      XML bomb protection for Python stdlib modules
  local/python-dulwich 1.1.0-1
      Pure-Python implementation of the Git file formats and protocols
  local/python-fastbencode 0.3.10-1
      Implementation of bencode with optional fast C extensions
  local/python-jinja 1:3.1.6-3
      A simple pythonic template language written in Python
  local/python-license-expression 30.4.4-2
      Utility to parse, normalize and compare license expressions
  local/python-markupsafe 3.0.3-1
      Implements a XML/HTML/XHTML Markup safe string for Python
  local/python-merge3 0.0.16-2
      Python implementation of 3-way merge
  local/python-patiencediff 0.2.18-2
      Patiencediff Python and C implementations
  local/python-pefile 2024.8.26-2
      Python PE parsing module
  local/python-pycparser 3.00-1
      C parser and AST generator written in Python
  local/python-systemd 235-5
      Python bindings for systemd
  local/python-tomlkit 0.14.0-1
      Style-preserving TOML library for Python
  local/python-tqdm 4.67.3-1
      Fast, Extensible Progress Meter
  local/python-urllib3 2.6.3-1
      HTTP library with thread-safe connection pooling and file post support
  local/python-yaml 6.0.3-2
      Python bindings for YAML, using fast libYAML library
  local/zbar 0.23.93-5
      Application and library for reading bar codes from various sources
  

• other =

  pacman -Qs hdr10
  local/hdr10plus-tool 1.7.2-1
      CLI utility to work with HDR10+ in HEVC files
  

  $HOME/.local/bin/qsvencc --check-hw
  Success: QuickSyncVideo (hw encoding) available
  Supported Encode Codecs for device auto:
  H.264/AVC PG
  H.264/AVC FF
  H.265/HEVC PG
  H.265/HEVC FF
  VP9 FF
  

  ffmpeg -version
  ffmpeg version n8.1 Copyright (c) 2000-2026 the FFmpeg developers
  built with gcc 15.2.1 (GCC) 20260209
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --      enable-lto --enable-fontconfig --enable-frei0r --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-lcms2 --enable-libaom --      enable-libass --enable-libbluray --enable-libbs2b --enable-libdav1d --enable-libdrm --enable-libdvdnav --enable-libdvdread --enable-      libfreetype --enable-libfribidi --enable-libglslang --enable-libgsm --enable-libharfbuzz --enable-libiec61883 --enable-libjack --enable-libjxl --      enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse --enable-librav1e --enable-librsvg --enable-librubberband --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpl --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-nvdec --enable-nvenc --enable-opencl --enable-opengl --enable-shared --enable-vapoursynth --enable-version3 --enable-vulkan
  libavutil      60. 26.100 / 60. 26.100
  libavcodec     62. 28.100 / 62. 28.100
  libavformat    62. 12.100 / 62. 12.100
  libavdevice    62.  3.100 / 62.  3.100
  libavfilter    11. 14.100 / 11. 14.100
  libswscale      9.  5.100 /  9.  5.100
  libswresample   6.  3.100 /  6.  3.100
  
  Exiting with exit code 0