I have a video in RGBA space contained in MPNG codec. Which is in 4K. I need to Convert that into a 1080p File... SO i Used this -
ffmpeg -i input.mkv -vcodec libx265 -vf scale=1920:1080 -sws_flags lanczos+accurate_rnd+full_chroma_inp+full_chroma_int -pix_fmt gbrp "x265GBRP.mkv"
But, I think ffmpeg converts rgb to yuv420p for scaling the footage.... I can See some Artifacts that yuv420p creates, like when you have Gradients... And also the Color is WASHED OUT! in output
NOTE: As both the Files are in RGB ColorFormat.... My Video Decoder is Not the Problem.... (And these Images are Screenshots of Extracted frames from the Input and Output File)
DEBUG LOG - txt File - GDrive