如何用C插件加载MPV脚本？

Question

在意识到在MPV (Possible to allow key bindings with MPV C API when no video (GUI) is being shown?)中使用C插件时几乎不可能找到帮助，我决定学习一些Lua来帮助解决这个问题。问题是，对于如何在C插件中添加Lua脚本，文档并不十分清楚，我发现在C插件中初始化mpv之前应该调用check_error(mpv_set_option_string(ctx, "load-scripts", "yes"));，这就指出应该有一种添加脚本的方法.在终端中加载脚本时，可以执行$HOME/.config/mpv...，这将从mpv video.mp4 --scripts="script_name.lua"内部调用脚本如何在MPV的C插件中实现Lua脚本的调用？我试了几样东西，包括check_error(mpv_set_option_string(ctx, "scripts", "test.lua"));，check_error(mpv_set_property_string(ctx, "scripts", "test.lua"));和const char *cmd2[] = {"scripts", "test.lua", NULL}; check_error(mpv_command(ctx, cmd2));，都没有用.

如何从C插件中调用MPV的Lua脚本？

下面是我用来测试事物的代码：

// Build with: g++ main.cpp -o output `pkg-config --libs --cflags mpv`

#include <iostream>
#include <mpv/client.h>

static inline void check_error(int status)
{
    if (status < 0)
    {
        std::cout << "mpv API error: " << mpv_error_string(status) << std::endl;
        exit(1);
    }
}

int main(int argc, char *argv[])
{
    if (argc != 2)
    {
        std::cout << "pass a single media file as argument" << std::endl;

        return 1;
    }

    mpv_handle *ctx = mpv_create();
    if (!ctx)
    {
        std::cout << "failed creating context" << std::endl;
        return 1;
    }

    // Enable default key bindings, so the user can actually interact with
    // the player (and e.g. close the window).
    check_error(mpv_set_option_string(ctx, "input-default-bindings", "yes"));
    mpv_set_option_string(ctx, "input-vo-keyboard", "yes");
    check_error(mpv_set_option_string(ctx, "load-scripts", "yes"));
    check_error(mpv_set_option_string(ctx, "scripts", "test.lua")); // DOES NOT WORK :(
    int val = 1;
    check_error(mpv_set_option(ctx, "osc", MPV_FORMAT_FLAG, &val));

    // Done setting up options.
    check_error(mpv_initialize(ctx));

    // Play the file passed in as a parameter when executing program.
    const char *cmd[] = {"loadfile", argv[1], NULL};
    check_error(mpv_command(ctx, cmd));

    // check_error(mpv_set_option_string(ctx, "scripts", "test.lua"));
    check_error(mpv_set_option_string(ctx, "shuffle", "yes")); // shuffle videos
    check_error(mpv_set_option_string(ctx, "loop-playlist", "yes")); // loop playlists
    // check_error(mpv_set_option_string(ctx, "aspect", "0:0")); // set aspect
    
    // Let it play, and wait until the user quits.
    while (1)
    {
        mpv_event *event = mpv_wait_event(ctx, 10000);
        std::cout << "event: " << mpv_event_name(event->event_id) << std::endl;

        if (event->event_id == MPV_EVENT_SHUTDOWN)
            break;
    }

    mpv_terminate_destroy(ctx);
    return 0;
}

Answer 1

在更多地使用mpv_set_property_string命令之后，我发现您必须为Lua文件指定完整的路径，默认情况下，它将搜索正在播放的目录中的文件，因此如果我尝试在/home/它将搜索/home/test.lua，那么要使它工作，我必须执行check_error(mpv_set_property_string(ctx, "scripts", "/home/netsu/.config/mpv/test.lua")); (给出绝对路径)。