JSON IPC and multiple external-file

[maiorfi-at-innovactive]

It seems that this subject has been already discussed here and there, but I did not spot yet how to properly format json ipc message related to multiple external-file options.

I would like to use lavfi-complex property in order to get a 2x2 tiling with a loadfile command and 3 external-file items.

Thanks!

[ghost]

You have to set this as a mpv_node with the format set to MPV_FORMAT_NODE_ARRAY. Each array item would be a string with the filename of an external file.

It's not possible to set this as a simple string, because filenames could contain , (or any other separator that could be used).

[maiorfi-at-innovactive]

Sorry for reiterating on this, but I'm still wondering whether it is possible (and, in that case, how) express a mpv_node with MPV_FORMAT_NODE_ARRAY using JSON-IPC notation.

Thanks.

[ghost]

sure, if you use json IPC, it should accept a json array of strings.

[maiorfi-at-innovactive]

Indeed I thought it should have been working with any of following two ways, but it didn't (below there are 2 request commands interleaved with corresponding reply event):

{ "command": ["set_property", "external-file", ["file1","file2"] ] }
{"error":"invalid parameter"}
{ "command": ["set_property", "external-file", "file1", "file2" ] }
{"error":"invalid parameter"}

Any suggestion?

[ghost]

That should have worked, but didn't because it restricted nesting so that passing the file array was not possible. I fixed it now.

[maiorfi-at-innovactive]

Great, thanks!