another q sorry for being naive but what did you meant by (DS) backend
It means DirectShow which is the native backend on Windows I guess.
This is what I asked "what is printed when you send a [loader( message to [pix_film] ?"
-> you need to send the messager "loader" to [pix_film] to know what backends are currently available on your system. It will print a list of backends with a number.
For exemple on my apple system I have :
[pix_film]: loader quicktime4linux
[pix_film]: loader AVF
[pix_film]: loader image
You can then change the backend number using for exemple "loader 1" or "loader 2" etc...