基于fdfind与fzf的mpv Lua文件选择播放脚本实现求助

1. Completed Lua Code Implementation #

First, let's fix your Lua script to properly pipe the fdfind output into your menu_fzf.sh and capture the selected files. The key issue with your previous attempts was that mp.utils.subprocess doesn't handle shell pipe syntax (|) by default—you need to enable shell mode to use shell features like pipes.

Here's the working code:

local utils = require 'mp.utils'

-- Replace this with your target directory (e.g., "/path/to/Music")
local target_dir = "/path/to/your/media/directory"

-- Build the full shell command: fdfind -> menu_fzf.sh
local command = string.format('fdfind . "%s" | /path/to/your/menu_fzf.sh', target_dir)

-- Execute the command with shell enabled to handle pipes
local file_select = utils.subprocess({
    args = command,
    shell = true,  -- Critical: enables shell to process the pipe
    cancellable = false,
    stdout = "pipe",  -- Capture stdout to get selected files
    stderr = "ignore"  -- Optional: suppress error output if not needed
})

-- Process the result: split stdout into individual file paths
if file_select.status == 0 then  -- Check if command succeeded
    local selected_files = {}
    -- Split stdout by newlines (ignore empty lines from trailing newlines)
    for line in string.gmatch(file_select.stdout, '[^\n]+') do
        table.insert(selected_files, line)
    end

    -- Add selected files to mpv's playlist (like kdialog-open-files.lua)
    for _, file in ipairs(selected_files) do
        mp.commandv('loadfile', file, 'append')
    end
    -- Optional: play the first file if playlist was empty
    if #selected_files > 0 then
        mp.command('play')
    end
else
    mp.osd_message("File selection cancelled or failed", 2)
end

Key Fixes Explained: #

• shell = true: This tells mp.utils.subprocess to run the command through the system shell, which allows pipe (|) syntax to work. Without this, the shell treats | and fzf as arguments to fdfind, which caused your earlier error.
• Full Command String: We construct the exact pipe command you used in bash, ensuring fdfind's output is passed to menu_fzf.sh as input.
• Capturing Stdout: The stdout = "pipe" setting ensures we capture the selected file paths from menu_fzf.sh's output.
• Result Processing: We split the captured stdout into individual file paths and add them to mpv's playlist, matching the behavior of the existing KDialog/Zenity scripts.

Don't forget to replace /path/to/your/media/directory and /path/to/your/menu_fzf.sh with your actual paths!

2. Detailed mp.utils.subprocess Reference #

Since the official mpv docs are sparse, here's a breakdown of the key parameters and behavior:

Parameters (Table Keys) #

• args: Can be either:
  • An array of strings (when shell = false, default): Each element is a command or argument (e.g., {'fdfind', '.', '/path/to/Music'}). No shell features like pipes/globs work here.
  • A single string (when shell = true): The full command to run via the system shell (supports pipes, variables, globs, etc.).
• shell: Boolean (default false). If true, runs the command through /bin/sh (or your system's default shell).
• cancellable: Boolean (default false). If true, allows mpv to kill the subprocess if the user cancels the action.
• stdin: Controls how the subprocess receives input:
  • "ignore" (default): Subprocess gets no input.
  • "pipe": You can write to the subprocess's stdin (via the returned handle, though this is more advanced).
• stdout/stderr: Controls output capture:
  • "ignore" (default): Discards output.
  • "pipe": Captures the output into the returned result table.
  • "devnull": Redirects to /dev/null.

Returned Result Table #

The function returns a table with these keys:

• status: Exit code of the subprocess (0 = success, non-zero = error).
• stdout: String containing captured stdout (only if stdout = "pipe").
• stderr: String containing captured stderr (only if stderr = "pipe").
• killed: Boolean indicating if the subprocess was killed by mpv (only if cancellable = true).

Source Location #

If you want to dive deeper into the implementation, the mp.utils.subprocess code lives in mpv's source tree at:

• For the C backend: player/lua/utils.c (handles the subprocess execution)
• For Lua wrapper docs: DOCS/man/lua.rst (the official sparse docs, but you can find more context in the C source)

内容的提问来源于stack exchange，提问作者Inspired_Blue