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

This Image was the Output: image 1

And this was the Input Frame:image 2

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

Something extra - enHello

  • Missing complete uncut debug log output of ffmpeg conversion.
    – user12174
    Jul 10 '20 at 15:47
  • Sir, I Updated It with the Log.. Is that What you meant with Debug Log Output, Sir?
    – user30535
    Jul 10 '20 at 16:06
  • no, i meant with "-v debug"
    – user12174
    Jul 10 '20 at 17:35
  • okay, Sir.. I am Doing that
    – user30535
    Jul 10 '20 at 17:52

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