apt-get install ffmpeg pulls in ~80 transitive shared libs (libav*,
libx264, libdrm, libva...) that perturb CasparCG 2.4.0's headless
runtime linking and make it abort with SIGABRT (exit 134) on almost
every launch. Replace it with john van sickle's self-contained static
ffmpeg/ffprobe binaries in /usr/local/bin — the standalone CLI the HLS
re-muxer needs, with zero new shared libraries, keeping CasparCG's
environment identical to the known-good image.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>