Save this as x265_companion_full.sh and run it on any .mkv file:
ffprobe -v quiet -print_format json -show_streams my_movie_x265.mkv | jq '.streams[] | select(.codec_name=="hevc") | .profile, .pix_fmt' companion x265
There is no single software called "Companion x265." Instead, these are community tools or media player companions designed to handle x265's complexities (10-bit, HDR10+, Dolby Vision). Save this as x265_companion_full
For the average viewer, these terms might look like technical gibberish. However, understanding what "Companion x265" refers to is key to understanding how modern high-quality video is distributed, stored, and streamed. Dolby Vision). For the average viewer