BBC iplayer aspect ratio

[pcr]

I would appreciate a little help please.
I can adjust the transcoder frame size to get a good result, but only for a single selected file.
How can I set the frame size for all of BBC iplayer ? What file type are these streams ?
Thanks, pcr.

[Eugene]

I would appreciate a little help please.
I can adjust the transcoder frame size to get a good result, but only for a single selected file.
How can I set the frame size for all of BBC iplayer ? What file type are these streams ?

Folder "BBC iPlayer" - on right click - "Edit title" - "Transfer resource to media device" - "Transcoding profile"