Remux that shit!

remux_for_appletv.rb

#!/usr/bin/env ruby

raise "Specify a video file!" unless mkv_file = ARGV.first
audio_file = mkv_file.gsub(/\.mkv/, ".ac3")
audio_track_file = mkv_file.gsub(/\.mkv/, ".mp4")
video_file = mkv_file.gsub(/\.mkv/, ".264")
m4v_file = mkv_file.gsub(/\.mkv/, ".m4v")

VLC_PATH = "/Applications/VLC.app/Contents/MacOS/VLC"
MP4BOX_PATH = "/Users/tekkub/bin/MP4box"
# MKVEXTRACT_PATH = "/Users/tekkub/bin/mkvextract"
# MKVMERGE_PATH = "/Users/tekkub/bin/mkvmerge"

puts "Extracting audio track"
# puts ident = `mkvmerge --identify "#{mkv_file}"`
# raise "Cannot find audio track" unless audio_track = ident.match(/^Track ID (\d+): audio/).to_a[1]
# `mkvextract tracks "#{mkv_file}" --raw #{audio_track}:"#{audio_file}"`
# `#{VLC_PATH} -I rc "#{mkv_file}" --sout='#transcode{vcodec=dummy,vb=1024,acodec=mp4a,ab=512}:std{mux=mp4,access=file,dst=#{audio_file}}' vlc://quit`
`#{VLC_PATH} -I rc "#{mkv_file}" --sout='#transcode{vcodec=dummy,vb=1024,acodec=fl32,ab=192}:standard{mux=wav,access=file,dst=#{audio_file}}' vlc://quit`

puts "Transcoding audio"
`afconvert "#{audio_file}" --file mp4f --data "aac@48000" --bitrate 320000`

# puts "Extracting audio track"
# `#{MP4BOX_PATH} "#{audio_file}" -raw 1`

puts "Extracting video track"
puts ident = `mkvmerge --identify "#{mkv_file}"`
raise "Cannot find video track" unless video_track = ident.match(/^Track ID (\d+): video/).to_a[1]
`mkvextract tracks "#{mkv_file}" #{video_track}:"#{video_file}"`

puts "Muxing streams"
puts `#{MP4BOX_PATH} -add "#{video_file}":fps=23.976 -add "#{audio_track_file}" "#{m4v_file}"`

File.delete audio_file, audio_track_file, video_file