ffmpeg -i Brassic.S05E04.mkv -c:v libx265 -crf 28 -c:a aac -b:a 128k Brassic.S05E04_small.mp4
ffmpeg -i Brassic.S05E04.mkv -map 0:s:0 subtitles.srt brassic s05e04 ffmpeg
Managing Your Brassic Collection: Processing Season 5, Episode 4 with FFmpeg ffmpeg -i Brassic
From 10m20s to 12m45s:
Brassic - S05E04 - I Voted for Brexit .mp4 brassic s05e04 ffmpeg
If the audio is off (common with some Brassic web-dl releases):