Rate control - target bitrate not achieved

[Bhavna Hariharan]

x265 is not able to achieve the target bitrate for 720p videos when the bitrate is very low. There is a huge deviation between the target and actual bitrates. For a target of 50kbps, a bitrate around 350kbps is achieved.

[Pradeep Ramachandran]

Can you please share your command line?

[Bhavna Hariharan]

--input ducks_take_off_420_720p50.y4m -p veryslow --bitrate 50 -o ducks_take_off_720p.hevc