Convert resolution 4096x2304 to 3840x2160 keeping the quality the same I have recently come into possession of a couple of 4k movies with a resolution of 4096x2304. Unfortunately my Samsung 4k TV wont play anything over 3840x2160.

I have managed to re-encode the videos to 3840x2160, unfortunately the bitrate fell to 1/10th of what it was before.

I used:

for %%a in ("*.mkv") do ffmpeg -i "%%a" -s 3840x2610 -q:v 0 -c:v libx264 -acodec copy D:\%%~na.mp4


Original file size was 27.8GB, the re-encoded one was under 8GB.

Is there any way I can re-encode them so I can keep the original bitrate/quality?


  Rant: Even my 4 year old computer can play the movie, but that fcking
  new Samsung TV of course can't /rant-end
Judge based on the quality rather than the bitrate value. Use CRF mode encoding and if the quality isn't what you can accept, decrease the CRF value.

ffmpeg -i "%%a" -s 3840x2610 -c:v libx264 -crf 18 -acodec copy D:\%%~na.mp4