Skip to content

Instantly share code, notes, and snippets.

@cjLGH

cjLGH/README.md

Last active January 28, 2019 07:27
Show Gist options
  • Save cjLGH/b96c050567f7bc4ff3cd1fd148515659 to your computer and use it in GitHub Desktop.
Save cjLGH/b96c050567f7bc4ff3cd1fd148515659 to your computer and use it in GitHub Desktop.
Download ZIP
H.264 to H.265
Raw
README.md

H.264 to H.265

FFMPEG Commands

Presets Medium and Veryfast, and CRF of 22

Command: ffmpeg -i "INPUT.mkv" -c:a copy -c:v libx265 -preset medium -x265-params crf=22 "OUTPUT.mkv"
Command: ffmpeg -i "INPUT.mkv" -c:a copy -c:v libx265 -preset veryfast -x265-params crf=22 "OUTPUT.mkv"

Two-Pass Encoding - 200 MiB

Original File: INPUT.mkv
Original File Duration (seconds): ~2706

Encoding Total Bitrate (kBit): ( 200 MiB * 8192 [converts MiB to kBit] / ~2706 seconds = ~605 kBit/s total bitrate
Encoding Video Bitrate (kBit): 605 - 128 kBit/s (desired audio bitrate) = 477 kBit/s video bitrate

Command Pass 1: ffmpeg -y -i "INPUT.mkv" -c:v libx265 -b:v 470k -x265-params pass=1 -an -f matroska /dev/null
Command Pass 2: ffmpeg -i "INPUT.mkv" -c:v libx265 -b:v 470k -x265-params pass=2 -c:a aac -b:a 128k "O.mkv"

Two-Pass Encoding - 350 MiB

Original File: INPUT.mkv
Original File Duration (seconds): ~2706

Encoding Total Bitrate (kBit): ( 350 MiB * 8192 [converts MiB to kBit] / ~2706 seconds = ~1060 kBit/s total bitrate
Encoding Video Bitrate (kBit): 1060 - 320 kBit/s (desired audio bitrate) = 740 kBit/s video bitrate

Command Pass 1: ffmpeg -y -i "INPUT.mkv" -c:v libx265 -b:v 740k -x265-params pass=1 -an -f matroska /dev/null
Command Pass 2: ffmpeg -i "INPUT.mkv" -c:v libx265 -b:v 740k -x265-params pass=2 -c:a aac -b:a 320k "S01E01-twopass-custom-350mb.mkv"

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment