423 lines
14 KiB
Lua
423 lines
14 KiB
Lua
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-- reload.lua
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--
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-- When an online video is stuck buffering or got very slow CDN
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-- source, restarting often helps. This script provides automatic
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-- reloading of videos that doesn't have buffering progress for some
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-- time while keeping the current time position. It also adds `Ctrl+r`
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-- keybinding to reload video manually.
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--
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-- SETTINGS
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--
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-- To override default setting put the `lua-settings/reload.conf` file in
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-- mpv user folder, on linux it is `~/.config/mpv`. NOTE: config file
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-- name should match the name of the script.
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--
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-- Default `reload.conf` settings:
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--
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-- ```
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-- # enable automatic reload on timeout
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-- # when paused-for-cache event fired, we will wait
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-- # paused_for_cache_timer_timeout sedonds and then reload the video
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-- paused_for_cache_timer_enabled=yes
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--
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-- # checking paused_for_cache property interval in seconds,
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-- # can not be less than 0.05 (50 ms)
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-- paused_for_cache_timer_interval=1
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--
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-- # time in seconds to wait until reload
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-- paused_for_cache_timer_timeout=10
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--
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-- # enable automatic reload based on demuxer cache
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-- # if demuxer-cache-time property didn't change in demuxer_cache_timer_timeout
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-- # time interval, the video will be reloaded as soon as demuxer cache depleated
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-- demuxer_cache_timer_enabled=yes
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--
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-- # checking demuxer-cache-time property interval in seconds,
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-- # can not be less than 0.05 (50 ms)
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-- demuxer_cache_timer_interval=2
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--
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-- # if demuxer cache didn't receive any data during demuxer_cache_timer_timeout
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-- # we decide that it has no progress and will reload the stream when
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-- # paused_for_cache event happens
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-- demuxer_cache_timer_timeout=20
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--
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-- # when the end-of-file is reached, reload the stream to check
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-- # if there is more content available.
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-- reload_eof_enabled=no
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--
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-- # keybinding to reload stream from current time position
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-- # you can disable keybinding by setting it to empty value
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-- # reload_key_binding=
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-- reload_key_binding=Ctrl+r
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-- ```
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--
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-- DEBUGGING
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--
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-- Debug messages will be printed to stdout with mpv command line option
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-- `--msg-level='reload=debug'`. You may also need to add the `--no-msg-color`
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-- option to make the debug logs visible if you are using a dark colorscheme
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-- in terminal.
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local msg = require 'mp.msg'
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local options = require 'mp.options'
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local utils = require 'mp.utils'
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local settings = {
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paused_for_cache_timer_enabled = true,
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paused_for_cache_timer_interval = 1,
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paused_for_cache_timer_timeout = 10,
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demuxer_cache_timer_enabled = true,
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demuxer_cache_timer_interval = 2,
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demuxer_cache_timer_timeout = 20,
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reload_eof_enabled = false,
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reload_key_binding = "Ctrl+r",
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}
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-- global state stores properties between reloads
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local property_path = nil
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local property_time_pos = 0
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local property_keep_open = nil
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-- FSM managing the demuxer cache.
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--
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-- States:
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--
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-- * fetch - fetching new data
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-- * stale - unable to fetch new data for time < 'demuxer_cache_timer_timeout'
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-- * stuck - unable to fetch new data for time >= 'demuxer_cache_timer_timeout'
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--
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-- State transitions:
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--
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-- +---------------------------+
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-- v |
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-- +-------+ +-------+ +-------+
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-- + fetch +<--->+ stale +---->+ stuck |
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-- +-------+ +-------+ +-------+
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-- | ^ | ^ | ^
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-- +---+ +---+ +---+
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local demuxer_cache = {
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timer = nil,
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state = {
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name = 'uninitialized',
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demuxer_cache_time = 0,
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in_state_time = 0,
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},
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events = {
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continue_fetch = { name = 'continue_fetch', from = 'fetch', to = 'fetch' },
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continue_stale = { name = 'continue_stale', from = 'stale', to = 'stale' },
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continue_stuck = { name = 'continue_stuck', from = 'stuck', to = 'stuck' },
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fetch_to_stale = { name = 'fetch_to_stale', from = 'fetch', to = 'stale' },
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stale_to_fetch = { name = 'stale_to_fetch', from = 'stale', to = 'fetch' },
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stale_to_stuck = { name = 'stale_to_stuck', from = 'stale', to = 'stuck' },
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stuck_to_fetch = { name = 'stuck_to_fetch', from = 'stuck', to = 'fetch' },
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},
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}
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-- Always start with 'fetch' state
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function demuxer_cache.reset_state()
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demuxer_cache.state = {
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name = demuxer_cache.events.continue_fetch.to,
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demuxer_cache_time = 0,
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in_state_time = 0,
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}
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end
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-- Has 'demuxer_cache_time' changed
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function demuxer_cache.has_progress_since(t)
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return demuxer_cache.state.demuxer_cache_time ~= t
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end
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function demuxer_cache.is_state_fetch()
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return demuxer_cache.state.name == demuxer_cache.events.continue_fetch.to
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end
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function demuxer_cache.is_state_stale()
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return demuxer_cache.state.name == demuxer_cache.events.continue_stale.to
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end
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function demuxer_cache.is_state_stuck()
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return demuxer_cache.state.name == demuxer_cache.events.continue_stuck.to
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end
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function demuxer_cache.transition(event)
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if demuxer_cache.state.name == event.from then
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-- state setup
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demuxer_cache.state.demuxer_cache_time = event.demuxer_cache_time
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if event.name == 'continue_fetch' then
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demuxer_cache.state.in_state_time = demuxer_cache.state.in_state_time + event.interval
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elseif event.name == 'continue_stale' then
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demuxer_cache.state.in_state_time = demuxer_cache.state.in_state_time + event.interval
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elseif event.name == 'continue_stuck' then
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demuxer_cache.state.in_state_time = demuxer_cache.state.in_state_time + event.interval
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elseif event.name == 'fetch_to_stale' then
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demuxer_cache.state.in_state_time = 0
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elseif event.name == 'stale_to_fetch' then
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demuxer_cache.state.in_state_time = 0
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elseif event.name == 'stale_to_stuck' then
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demuxer_cache.state.in_state_time = 0
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elseif event.name == 'stuck_to_fetch' then
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demuxer_cache.state.in_state_time = 0
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end
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-- state transition
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demuxer_cache.state.name = event.to
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msg.debug('demuxer_cache.transition', event.name, utils.to_string(demuxer_cache.state))
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else
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msg.error(
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'demuxer_cache.transition',
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'illegal transition', event.name,
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'from state', demuxer_cache.state.name)
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end
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end
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function demuxer_cache.initialize(demuxer_cache_timer_interval)
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demuxer_cache.reset_state()
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demuxer_cache.timer = mp.add_periodic_timer(
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demuxer_cache_timer_interval,
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function()
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demuxer_cache.demuxer_cache_timer_tick(
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mp.get_property_native('demuxer-cache-time'),
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demuxer_cache_timer_interval)
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end
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)
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end
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-- If there is no progress of demuxer_cache_time in
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-- settings.demuxer_cache_timer_timeout time interval switch state to
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-- 'stuck' and switch back to 'fetch' as soon as any progress is made
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function demuxer_cache.demuxer_cache_timer_tick(demuxer_cache_time, demuxer_cache_timer_interval)
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local event = nil
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local cache_has_progress = demuxer_cache.has_progress_since(demuxer_cache_time)
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-- I miss pattern matching so much
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if demuxer_cache.is_state_fetch() then
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if cache_has_progress then
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event = demuxer_cache.events.continue_fetch
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else
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event = demuxer_cache.events.fetch_to_stale
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end
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elseif demuxer_cache.is_state_stale() then
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if cache_has_progress then
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event = demuxer_cache.events.stale_to_fetch
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elseif demuxer_cache.state.in_state_time < settings.demuxer_cache_timer_timeout then
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event = demuxer_cache.events.continue_stale
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else
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event = demuxer_cache.events.stale_to_stuck
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end
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elseif demuxer_cache.is_state_stuck() then
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if cache_has_progress then
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event = demuxer_cache.events.stuck_to_fetch
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else
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event = demuxer_cache.events.continue_stuck
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end
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end
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event.demuxer_cache_time = demuxer_cache_time
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event.interval = demuxer_cache_timer_interval
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demuxer_cache.transition(event)
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end
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local paused_for_cache = {
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timer = nil,
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time = 0,
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}
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function paused_for_cache.reset_timer()
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msg.debug('paused_for_cache.reset_timer', paused_for_cache.time)
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if paused_for_cache.timer then
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paused_for_cache.timer:kill()
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paused_for_cache.timer = nil
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paused_for_cache.time = 0
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end
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end
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function paused_for_cache.start_timer(interval_seconds, timeout_seconds)
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msg.debug('paused_for_cache.start_timer', paused_for_cache.time)
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if not paused_for_cache.timer then
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paused_for_cache.timer = mp.add_periodic_timer(
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interval_seconds,
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function()
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paused_for_cache.time = paused_for_cache.time + interval_seconds
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if paused_for_cache.time >= timeout_seconds then
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paused_for_cache.reset_timer()
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reload_resume()
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end
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msg.debug('paused_for_cache', 'tick', paused_for_cache.time)
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end
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)
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end
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end
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function paused_for_cache.handler(property, is_paused)
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if is_paused then
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if demuxer_cache.is_state_stuck() then
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msg.info("demuxer cache has no progress")
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-- reset demuxer state to avoid immediate reload if
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-- paused_for_cache event triggered right after reload
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demuxer_cache.reset_state()
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reload_resume()
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end
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paused_for_cache.start_timer(
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settings.paused_for_cache_timer_interval,
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settings.paused_for_cache_timer_timeout)
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else
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paused_for_cache.reset_timer()
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end
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end
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function read_settings()
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options.read_options(settings, mp.get_script_name())
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msg.debug(utils.to_string(settings))
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end
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function reload(path, time_pos)
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msg.debug("reload", path, time_pos)
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if time_pos == nil then
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mp.commandv("loadfile", path, "replace")
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else
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mp.commandv("loadfile", path, "replace", "start=+" .. time_pos)
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end
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end
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function reload_resume()
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local path = mp.get_property("path", property_path)
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local time_pos = mp.get_property("time-pos")
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local reload_duration = mp.get_property_native("duration")
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local playlist_count = mp.get_property_number("playlist/count")
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local playlist_pos = mp.get_property_number("playlist-pos")
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local playlist = {}
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for i = 0, playlist_count-1 do
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playlist[i] = mp.get_property("playlist/" .. i .. "/filename")
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end
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-- Tries to determine live stream vs. pre-recordered VOD. VOD has non-zero
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-- duration property. When reloading VOD, to keep the current time position
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-- we should provide offset from the start. Stream doesn't have fixed start.
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-- Decent choice would be to reload stream from it's current 'live' positon.
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-- That's the reason we don't pass the offset when reloading streams.
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if reload_duration and reload_duration > 0 then
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msg.info("reloading video from", time_pos, "second")
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reload(path, time_pos)
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-- VODs get stuck when reload is called without a time_pos
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-- this is most noticeable in youtube videos whenever download gets stuck in the first frames
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-- video would stay paused without being actually paused
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-- issue surfaced in mpv 0.33, afaik
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elseif reload_duration and reload_duration == 0 then
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msg.info("reloading video from", time_pos, "second")
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reload(path, time_pos)
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else
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msg.info("reloading stream")
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reload(path, nil)
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end
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msg.info("file", playlist_pos+1, "of", playlist_count, "in playlist")
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for i = 0, playlist_pos-1 do
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mp.commandv("loadfile", playlist[i], "append")
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end
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mp.commandv("playlist-move", 0, playlist_pos+1)
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for i = playlist_pos+1, playlist_count-1 do
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mp.commandv("loadfile", playlist[i], "append")
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end
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end
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function reload_eof(property, eof_reached)
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msg.debug("reload_eof", property, eof_reached)
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local time_pos = mp.get_property_number("time-pos")
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local duration = mp.get_property_number("duration")
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if eof_reached and round(time_pos) == round(duration) then
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msg.debug("property_time_pos", property_time_pos, "time_pos", time_pos)
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-- Check that playback time_pos made progress after the last reload. When
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-- eof is reached we try to reload the video, in case there is more content
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-- available. If time_pos stayed the same after reload, it means that the
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-- video length stayed the same, and we can end the playback.
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if round(property_time_pos) == round(time_pos) then
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msg.info("eof reached, playback ended")
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mp.set_property("keep-open", property_keep_open)
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else
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msg.info("eof reached, checking if more content available")
|
||
|
|
reload_resume()
|
||
|
|
mp.set_property_bool("pause", false)
|
||
|
|
property_time_pos = time_pos
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
function on_file_loaded(event)
|
||
|
|
local debug_info = {
|
||
|
|
event = event,
|
||
|
|
time_pos = mp.get_property("time-pos"),
|
||
|
|
stream_pos = mp.get_property("stream-pos"),
|
||
|
|
stream_end = mp.get_property("stream-end"),
|
||
|
|
duration = mp.get_property("duration"),
|
||
|
|
seekable = mp.get_property("seekable"),
|
||
|
|
pause = mp.get_property("pause"),
|
||
|
|
paused_for_cache = mp.get_property("paused-for-cache"),
|
||
|
|
cache_buffering_state = mp.get_property("cache-buffering-state"),
|
||
|
|
}
|
||
|
|
msg.debug("debug_info", utils.to_string(debug_info))
|
||
|
|
|
||
|
|
-- When the video is reloaded after being paused for cache, it won't start
|
||
|
|
-- playing again while all properties looks fine:
|
||
|
|
-- `pause=no`, `paused-for-cache=no` and `cache-buffering-state=100`.
|
||
|
|
-- As a workaround, we cycle through the paused state by sending two SPACE
|
||
|
|
-- keypresses.
|
||
|
|
-- What didn't work:
|
||
|
|
-- - Cycling through the `pause` property.
|
||
|
|
-- - Run the `playlist-play-index current` command.
|
||
|
|
mp.commandv("keypress", 'SPACE')
|
||
|
|
mp.commandv("keypress", 'SPACE')
|
||
|
|
end
|
||
|
|
|
||
|
|
-- Round positive numbers.
|
||
|
|
function round(num)
|
||
|
|
return math.floor(num + 0.5)
|
||
|
|
end
|
||
|
|
|
||
|
|
-- main
|
||
|
|
|
||
|
|
read_settings()
|
||
|
|
|
||
|
|
if settings.reload_key_binding ~= "" then
|
||
|
|
mp.add_key_binding(settings.reload_key_binding, "reload_resume", reload_resume)
|
||
|
|
end
|
||
|
|
|
||
|
|
if settings.paused_for_cache_timer_enabled then
|
||
|
|
mp.observe_property("paused-for-cache", "bool", paused_for_cache.handler)
|
||
|
|
end
|
||
|
|
|
||
|
|
if settings.demuxer_cache_timer_enabled then
|
||
|
|
demuxer_cache.initialize(settings.demuxer_cache_timer_interval)
|
||
|
|
end
|
||
|
|
|
||
|
|
if settings.reload_eof_enabled then
|
||
|
|
-- vo-configured == video output created && its configuration went ok
|
||
|
|
mp.observe_property(
|
||
|
|
"vo-configured",
|
||
|
|
"bool",
|
||
|
|
function(name, vo_configured)
|
||
|
|
msg.debug(name, vo_configured)
|
||
|
|
if vo_configured then
|
||
|
|
property_path = mp.get_property("path")
|
||
|
|
property_keep_open = mp.get_property("keep-open")
|
||
|
|
mp.set_property("keep-open", "yes")
|
||
|
|
mp.set_property("keep-open-pause", "no")
|
||
|
|
end
|
||
|
|
end
|
||
|
|
)
|
||
|
|
|
||
|
|
mp.observe_property("eof-reached", "bool", reload_eof)
|
||
|
|
end
|
||
|
|
|
||
|
|
mp.register_event("file-loaded", on_file_loaded)
|