The VideoLAN Forums

Posted: **23 Apr 2021 01:56**

Hello.

I am newbie at scripting vlc and I want to create the extension that do the following.

For minimum requirements I want that the extension every time when playing starts will write to file the name and path to file that started playing.
For full requirements I want store last played file name for every folder separately, save this info to file or database and output this in dialog box.

Is it possible with Lua?
Thanks.

Posted: **24 Apr 2021 14:11**

Yes, it is. Have you already checked available extensions? Perhaps you can find something similar: https://addons.videolan.org

Posted: **30 Apr 2021 10:59**

EDIT: wow I freaking figured it out minutes after posting when trying to save another lua file into the same folder. Running VLC as an administrator fixed the problem... I guess I could save the txt file somewhere in my documents folder since it will have to read/write every time a file is played.

I'm trying something similar, however io.output is throwing me an error.

Code: Select all

extfile = io.open(vlc.config.datadir().."\\lua\\extensions\\basic_history.txt", "r")
    if extfile == nil
        then
		
            extfile = io.output (vlc.config.datadir().."\\lua\\extensions\\basic_history.txt")
            extfile = io.open(vlc.config.datadir().."\\lua\\extensions\\basic_history.txt", "r")
    end

Specifically, VLC messages is throwing this error

Code: Select all

lua warning: Error while running script C:\Program Files\VideoLAN\VLC\lua\extensions\basic_history.lua,
function activate(): ... Files\VideoLAN\VLC\lua\extensions\basic_history.lua:29: bad argument #1 to 'output' (C:\Program Files\VideoLAN\VLC\lua\extensions\basic_history.txt: Permission denied)
lua error: Could not activate extension!

I'd like to just create a text file, and every time VLC opens a new file it appends the file name to the text file. Essentially creating a history.

Posted: **30 Apr 2021 13:27**

You could use "vlc.io" instead of Lua's standard "io". It is available since VLC 3.0.2 and it solves a problem with non-ASCII characters.

Input/Output
------------
All path for this namespace are expected to be passed as UTF8 strings.

io.mkdir("path", "mode"): Similar to mkdir(2). The mode is passed as a string
to allow for octal representations. This returns a success code (non 0 in
case of failure), and a more specific error code as its 2nd returned value
in case of failure. The error code is to be used with vlc.errno
io.readdir("path"): Lists all files & directories in the provided folder.
io.open("path"[, "mode"]): Similar to lua's io.open. Mode is optional and
defaults to "r". It returns a file object with the following member functions:
.read
.write
.seek
.flush
.close
all of which are used exactly like the lua object returned by io.open
io.unlink("path"): Similar to os.remove. First return value is 0 in case
of success. In case of failure, the 2nd return parameter is an error
code to be compared against vlc.errno values.

Example:

Code: Select all

f = vlc.io.open(vlc.config.userdatadir().."/text_file.txt", "a+")
if f then
	f:write("string".."\r\n")
	f:close()
end

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Saving last played file

Saving last played file

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Re: Saving last played file

Re: Saving last played file