I have a 3000 by 3000 VR video encoded in H264. I scaled down the video by
ffmpeg -i input.mp4 -vf scale=2160:2160 output.mp4
To my surprise, the bit rate of
output.mp4 did not decrease (in fact, it increased a little bit).
Is not a scaled down video supposed to have lower bit rate than the original video? What is the mechanism of