The VideoLAN Forums

Posted: **08 Nov 2023 14:12**

Hello,

I have lots of video with multiple audio channel, two in french and one in english. Right now, when I set VLC to play FR by default in the setting it will play the first to be French.

But the first French one is Quebec version, and I would like to play by default the France version.

They have for title "VFF" for France and "VFQ" for Quebec.

I tried to make a script to automatically play the VFF titled one but it doesn't seem to work, I can't even seem to trigger the callback when I change video.

https://pastebin.com/raw/YRxTy3he

Code: Select all

function descriptor()
    return {
        title = "VLC Extension - Basic structure",
        version = "1.0",
        author = "",
        shortdesc = "short description",
        description = "full description",
        capabilities = {"input-listener"}
    }
end

function activate()
    create_dialog()
end

function input_changed()
    vlc.msg.info("playing_changed")
    local input = vlc.object.input()
    if input then
        local audio_tracks = vlc.input.item():metas()["input-es"]
        vlc.msg.info("Total audio streams found: " .. #audio_tracks)
        
        for i, track in pairs(audio_tracks) do
            vlc.msg.info("Audio stream " .. i .. " title: " .. track["title"])
            if track["title"] == "VFF" then
                vlc.var.set(input, "audio-es", i - 1)
                vlc.msg.info("Selected the 'VFF' audio stream.")
                break
            end
        end
    end
}

greeting = "Welcome!<br />"  -- example of global variable
function create_dialog()
    w = vlc.dialog("VLC Extension - Dialog box example")
    w1 = w:add_text_input("Hello world!", 1, 1, 3, 1)
    w2 = w:add_html(greeting, 1, 2, 3, 1)
    w3 = w:add_button("Action!",click_Action, 1, 3, 1, 1)
    w4 = w:add_button("Clear",click_Clear, 2, 3, 1, 1)
end
function click_Action()
    local input_string = w1:get_text()  -- local variable
    local output_string = w2:get_text() .. input_string .. "<br />"
    --w1:set_text("")
    w2:set_text(output_string)
end
function click_Clear()
    w2:set_text("")
end

I'm really not used to VLC api, and not getting any output in the vlc message is even harder to understand how it work

The VideoLAN Forums

Force audio channel by title metadata

Force audio channel by title metadata