I want to generate 16:9 thumbnails from videos with white padding but the resulting picture has grey padding instead of white. This is the command line (input here is a jpg but the effect is the same when using a video):
ffmpeg.exe -i "https://gooseberry.blender.org/wp-content/uploads/2014/01/franck.jpg" -filter_complex scale=iw*min(852/iw\,480/ih):ih*min(852/iw\,480/ih),pad=852:480:(852-iw*min(852/iw\,480/ih))/2:(480-ih*min(852/iw\,480/ih))/2:white,fps=fps=50/5.000000 output.jpg
even though the padding color is white it's light grey in reality. Is there a way to get it 'whiter'? It's especially ugly if you plan to print it on paper.