Hello,In the documentation : 39.107 noformat Force libavfilter not to use any of the specified pixel formats for the input to the next filter. It accepts the following parameters: - pix_fmts - A ’|’-separated list of pixel format names, such as apix_fmts=yuv420p|monow|rgb24". In yellow : a pix_fmts=...Isn't it ? BTW,Marco