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MAX_SPEED = 100
NORMAL_SPEED = 1
ONE_SECOND = 1
skip = false
-- Max noise (dB) and min silence duration (s) to trigger
opts = { quietness = -30, duration = 0.5 }
function setOptions()
local options = require 'mp.options'
options.read_options(opts)
end
function setTime(time)
mp.set_property_number('time-pos', time)
end
function getTime()
return mp.get_property_native('time-pos')
end
function setSpeed(speed)
mp.set_property('speed', speed)
end
function setPause(state)
mp.set_property_bool('pause', state)
end
function setMute(state)
mp.set_property_bool('mute', state)
end
function initAudioFilter()
local af_table = mp.get_property_native('af')
af_table[#af_table + 1] = {
enabled = false,
label = 'silencedetect',
name = 'lavfi',
params = { graph = 'silencedetect=noise=' .. opts.quietness .. 'dB:d=' .. opts.duration }
}
mp.set_property_native('af', af_table)
end
function initVideoFilter()
local vf_table = mp.get_property_native('vf')
vf_table[#vf_table + 1] = {
enabled = false,
label = 'blackout',
name = 'lavfi',
params = { graph = '' }
}
mp.set_property_native('vf', vf_table)
end
function setAudioFilter(state)
local af_table = mp.get_property_native('af')
if #af_table > 0 then
for i = #af_table, 1, -1 do
if af_table[i].label == 'silencedetect' then
af_table[i].enabled = state
mp.set_property_native('af', af_table)
break
end
end
end
end
function dim(state)
local dim = { width = 0, height = 0 }
if state == true then
dim.width = mp.get_property_native('width')
dim.height = mp.get_property_native('height')
end
return dim.width .. 'x' .. dim.height
end
function setVideoFilter(state)
local vf_table = mp.get_property_native('vf')
if #vf_table > 0 then
for i = #vf_table, 1, -1 do
if vf_table[i].label == 'blackout' then
vf_table[i].enabled = state
vf_table[i].params = { graph = 'nullsink,color=c=black:s=' .. dim(state) }
mp.set_property_native('vf', vf_table)
break
end
end
end
end
function silenceTrigger(name, value)
if value == '{}' or value == nil then
return
end
local skipTime = tonumber(string.match(value, '%d+%.?%d+'))
local currTime = getTime()
if skipTime == nil or skipTime < currTime + ONE_SECOND then
return
end
stopSkip()
setTime(skipTime)
skip = false
end
function setAudioTrigger(state)
if state == true then
mp.observe_property('af-metadata/silencedetect', 'string', silenceTrigger)
else
mp.unobserve_property(silenceTrigger)
end
end
function startSkip()
startTime = getTime()
-- This audio filter detects moments of silence
setAudioFilter(true)
-- This video filter makes fast-forward faster
setVideoFilter(true)
setAudioTrigger(true)
setPause(false)
setMute(true)
setSpeed(MAX_SPEED)
end
function stopSkip()
setAudioFilter(false)
setVideoFilter(false)
setAudioTrigger(false)
setMute(false)
setSpeed(NORMAL_SPEED)
end
function keypress()
skip = not skip
if skip then
startSkip()
else
stopSkip()
setTime(startTime)
end
end
setOptions(opts)
initAudioFilter()
initVideoFilter()
mp.add_key_binding('Tab', 'skip-key', keypress)
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