[Libav-user] Filter for scaling

[Stefan Lederer]

Hi,

I use ffmpeg to upscale an encoded video (at a lower resolution) to
the resolution of the source video to get the PSNR. I would need to
know which upscaling filter is used when i use this parameter for
upscaling in ffmpeg: -vf "scale=1920:1080". Could anyone help me?

Thx for help!
Stefan