videoclip/encoder.lua

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--[[
Copyright: Ren Tatsumoto and contributors
License: GNU GPL, version 3 or later; http://www.gnu.org/licenses/gpl.html
Encoder provides interface for creating audio/video clips.
]]
local mp = require('mp')
local h = require('helpers')
local utils = require('mp.utils')
local this = {}
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local function toms(timestamp)
--- Trim timestamp down to milliseconds.
return string.format("%.3f", timestamp)
end
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local function construct_output_filename_noext()
local filename = mp.get_property("filename") -- filename without path
filename = h.remove_extension(filename)
if this.config.clean_filename then
filename = h.remove_text_in_brackets(filename)
filename = h.remove_special_characters(filename)
end
filename = string.format(
'%s_%s-%s',
filename,
h.human_readable_time(this.timings['start']),
h.human_readable_time(this.timings['end'])
)
return filename
end
function this.get_ext_subs_paths()
local track_list = mp.get_property_native('track-list')
local external_subs_list = {}
for _, track in pairs(track_list) do
if track.type == 'sub' and track.external == true then
external_subs_list[track.id] = track['external-filename']
end
end
return external_subs_list
end
function this.append_embed_subs_args(args)
local ext_subs_paths = this.get_ext_subs_paths()
for _, ext_subs_path in pairs(ext_subs_paths) do
table.insert(args, #args, table.concat { '--sub-files-append=', ext_subs_path, })
end
return args
end
this.mk_out_path_video = function(clip_filename_noext)
return utils.join_path(this.config.video_folder_path, clip_filename_noext .. this.config.video_extension)
end
this.mkargs_video = function(out_clip_path)
local args = {
this.player,
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mp.get_property('path'),
'--loop-file=no',
'--keep-open=no',
'--no-ocopy-metadata',
'--no-sub',
'--audio-channels=2',
'--oacopts-add=vbr=on',
'--oacopts-add=application=voip',
'--oacopts-add=compression_level=10',
'--vf-add=format=yuv420p',
'--sub-font-provider=auto',
'--embeddedfonts=yes',
table.concat { '--sub-font=', this.config.sub_font },
table.concat { '--ovc=', this.config.video_codec },
table.concat { '--oac=', this.config.audio_codec },
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table.concat { '--start=', toms(this.timings['start']) },
table.concat { '--end=', toms(this.timings['end']) },
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table.concat { '--aid=', mp.get_property("aid") }, -- track number
table.concat { '--mute=', mp.get_property("mute") },
table.concat { '--volume=', mp.get_property('volume') },
table.concat { '--ovcopts-add=b=', this.config.video_bitrate },
table.concat { '--oacopts-add=b=', this.config.audio_bitrate },
table.concat { '--ovcopts-add=crf=', this.config.video_quality },
table.concat { '--ovcopts-add=preset=', this.config.preset },
table.concat { '--vf-add=scale=', this.config.video_width, ':', this.config.video_height },
table.concat { '--ytdl-format=', mp.get_property("ytdl-format") },
table.concat { '--o=', out_clip_path },
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table.concat { '--sid=', mp.get_property("sid") },
table.concat { '--secondary-sid=', mp.get_property("secondary-sid") },
table.concat { '--sub-delay=', mp.get_property("sub-delay") },
table.concat { '--sub-visibility=', mp.get_property("sub-visibility") },
table.concat { '--secondary-sub-visibility=', mp.get_property("secondary-sub-visibility") }
}
if this.config.video_fps ~= 'auto' then
table.insert(args, #args, table.concat { '--vf-add=fps=', this.config.video_fps })
end
args = this.append_embed_subs_args(args)
return args
end
this.mk_out_path_audio = function(clip_filename_noext)
return utils.join_path(this.config.audio_folder_path, clip_filename_noext .. this.config.audio_extension)
end
this.mkargs_audio = function(out_clip_path)
return {
this.player,
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mp.get_property('path'),
'--loop-file=no',
'--keep-open=no',
'--no-ocopy-metadata',
'--no-sub',
'--audio-channels=2',
'--video=no',
'--oacopts-add=vbr=on',
'--oacopts-add=application=voip',
'--oacopts-add=compression_level=10',
table.concat { '--oac=', this.config.audio_codec },
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table.concat { '--start=', toms(this.timings['start']) },
table.concat { '--end=', toms(this.timings['end']) },
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table.concat { '--volume=', mp.get_property('volume') },
table.concat { '--aid=', mp.get_property("aid") }, -- track number
table.concat { '--oacopts-add=b=', this.config.audio_bitrate },
table.concat { '--ytdl-format=', mp.get_property("ytdl-format") },
table.concat { '--o=', out_clip_path }
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}
end
this.create_clip = function(clip_type, on_complete)
if clip_type == nil then
return
end
if not this.timings:validate() then
h.notify("Wrong timings. Aborting.", "warn", 2)
return
end
h.notify("Please wait...", "info", 9999)
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local output_file_path, args = (function()
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local clip_filename_noext = construct_output_filename_noext()
if clip_type == 'video' then
local output_path = this.mk_out_path_video(clip_filename_noext)
return output_path, this.mkargs_video(output_path)
else
local output_path = this.mk_out_path_audio(clip_filename_noext)
return output_path, this.mkargs_audio(output_path)
end
end)()
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print("The following args will be executed:", table.concat(h.quote_if_necessary(args), " ") )
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local output_dir_path = utils.split_path(output_file_path)
local location_info = utils.file_info(output_dir_path)
if not location_info.is_dir then
h.notify(string.format("Error: location %s doesn't exist.", output_dir_path), "error", 5)
return
end
local process_result = function(_, ret, _)
if ret.status ~= 0 or string.match(ret.stdout, "could not open") then
h.notify(string.format("Error: couldn't create clip %s.", output_file_path), "error", 5)
else
h.notify(string.format("Clip saved to %s.", output_file_path), "info", 2)
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if on_complete then
on_complete(output_file_path)
end
end
end
h.subprocess_async(args, process_result)
this.timings:reset()
end
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this.set_encoder_alive = function()
local args_mpvnet = { 'mpvnet', '--version' }
local process_result_mpvnet = function(_, ret, _)
-- for some reason stdout is empty
if ret.status ~= 0 then
this.alive = false
else
this.alive = true
this.player = 'mpvnet'
end
end
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local args = { 'mpv', '--version' }
local process_result = function(_, ret, _)
if ret.status ~= 0 or string.match(ret.stdout, "mpv") == nil then
h.subprocess_async(args_mpvnet, process_result_mpvnet)
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else
this.alive = true
this.player = 'mpv'
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end
end
h.subprocess_async(args, process_result)
end
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this.init = function(config, timings_mgr)
this.config = config
this.timings = timings_mgr
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this.set_encoder_alive()
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end
return this