Change container from MKV to MP4 (copy video/audio/subtitles):
ffmpeg -i "input.mkv" -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" "S01E02_fast.mp4" From 5m30s for 45 seconds: rick and morty s01e02 ffmpeg
ffmpeg -ss 00:05:30 -i "input.mkv" -t 45 -c copy "S01E02_clip.mkv" ffmpeg -i "input.mkv" -vf "subtitles=input.mkv:si=0" -c:a copy "S01E02_hardsub.mp4" ( si=0 = first subtitle stream) Pro tip for encoding all episodes for f in *.mkv; do ffmpeg -i "$f" -c:v libx264 -crf 23 -preset fast -c:a aac -b:a 128k "${f%.mkv}.mp4" done Need a specific command (e.g., crop black bars, add watermark, or extract the "Where are my testicles, Summer?" audio)? Let me know! crop black bars