SD streams require to zoom in to avoid black frame

Hi,

I would like to ask. I use the PVR to watch some streams through a playlist and I noticed that most of the time the SD ones don’t stretch to the whole screen. I have to play with the video settings by adding 6 points to the zoom amount. None of the view modes work with this, they always leave this black frame around the video. Is there anything I can do about it or is just a problem with the source?

Thanks.

P.D.: I have tried with Vlc and noticed the same behaviour so it seems like a problem with the source. Is there any setting I can use so I don’t have to change configuration every time I watch these sources?