The video codec. x264 is more universally compatible than x265 (HEVC) on older 3D TVs and media players. For a 3-hour film like Titanic, a well-tuned x264 encode provides smooth playback even on low-power devices like a Raspberry Pi or a 2015-era Smart TV.
mkvmerge -o Titanic_1997_3D_1080p.mkv \ --default-track 0 --language 0:eng \ "Titanic.1997.3D.Half.SBS.1080p.BDRip.x264.AC3.Fix.mkv" \ --language 0:eng \ "titanic.eng.srt" titanic 1997 3d half sbs 1080p bdrip x264 ac3 fix
: Fixing hardcoded subtitles or adding missing forced subtitle tracks for non-English dialogue. The video codec