构建播放列表以在 vlc 中播放媒体文件的选定部分

Question

我有一个媒体文件列表（DVD VOB文件），我只想从文件列表中观看视频的一部分。

#! /bin/bash
export SOURCE_DIR=/path/to/dvds/dir
export DVD1=$SOURCE_DIR/dvd1/VIDEO_TS
export DVD2=$SOURCE_DIR/dvd2/VIDEO_TS
export DVD3=$SOURCE_DIR/dvd3/VIDEO_TS
export DVD4=$SOURCE_DIR/dvd4/VIDEO_TS
export FILE1=VTS_01_1.VOB
export FILE2=VTS_01_2.VOB
export FILE3=VTS_01_3.VOB
export FILE4=VTS_01_4.VOB
vlc --play-and-exit --start-time=348 --stop-time=355 $DVD1/$FILE1
vlc --play-and-exit --start-time=574 --stop-time=594 $DVD1/$FILE2
#... and so on ...

我想出了上面的脚本，该脚本启动了一个 vlc 实例并播放指定start-time中的每个文件并stop-time。这工作正常，但在每个 vlc --play-and-exit 语句中都会启动一个新的 vlc 实例，并且文件之间会出现明显的中断。

有没有办法将播放列表规则集成到 vlc 中，以便单个实例可以继续播放脚本文件中的所有视频？

可以假设我知道每个文件的start-time值和stop-time值

Answer 1

我能够按照此处的说明完成这项工作。VLC具有lua脚本支持。下面是我想出的脚本，它需要一个以 .fixedseek 扩展名结尾的文件。播放列表文件是一个csv文件，包含三列，分别包含file_path_url、start_time stop_time 例如

file:///path/to/dvds/dvd1/VIDEO_TS/VTS_01_3.VOB,348,355
file:///path/to/dvds/dvd2/VIDEO_TS/VTS_01_3.VOB,548,855
... and so on ...

该脚本分析文件并从start_time到stop_time播放每一行

-- fixedseek.lua
-- A compiled version of this file (.luac) should be put into the proper VLC playlist parsers directory.
-- In my ubuntu 14.04 vlc installation, it was: /usr/lib/vlc/lua/playlist/
-- For details, refer to:
-- http://wiki.videolan.org/Documentation:Play_HowTo/Building_Lua_Playlist_Scripts
--
-- The play list file format consists of three comma separated parts:
-- (file_path_url, start_time, stop_time)
-- e.g.
-- file:///path/to/dvds/dvd1/VIDEO_TS/VTS_01_3.VOB,348,355
-- The script below opens the file, seeks to start_time and plays until stop_time
-- and then moves on to next file in the playlist
function probe()
    -- tell VLC we will handle anything ending in ".fixedseek"
    return string.match(vlc.path, "%.fixedseek$")
end
function parse()
    -- VLC expects us to return a list of items, each item itself a list
    -- of properties
    playlist = {}
    while true do
       playlist_item = {}
       line = vlc.readline()
       if line == nil then
           break
    else vlc.msg.info(" Read line: '"..line.."'")
       end
-- parse playlist line into three tokens splitting on comma
values = {}
i=0
for word in string.gmatch(line, '([^,]+)') do
    values[i]=word
    i=i+1
end
vlc.msg.info(values[0])
vlc.msg.info(values[1])
vlc.msg.info(values[2])
       playlist_item.path = values[0]
       start_time = values[1]
       stop_time = values[2]
     vlc.msg.info("  Start is '"..tostring(start_time).."'")
     vlc.msg.info("  Stop is '"..tostring(stop_time).."'")
       -- a playlist item has another list inside of it of options
       playlist_item.options = {}
       table.insert(playlist_item.options, "start-time="..tostring(start_time))
       table.insert(playlist_item.options, "stop-time="..tostring(stop_time))
       table.insert(playlist_item.options, "fullscreen")
       -- add the item to the playlist
       table.insert( playlist, playlist_item )
    end
    return playlist
end