[x264-devel] Error in using 2-pass rate control scheme

[john sisi]

Hi All,

I used the following command to encode video Foreman (CIF) at 256kbps:
x264 --bitrate 256 --pass 1 -o foreman.264 forman.yuv 352x288

Then I used the following command:
x264 --bitrate 256 --pass 2 -o foreman.264 forman.yuv 352x288

but I got the following error:
x264[error]: requested bitrate is too low. estimated minimum is 262 kbps.
x264[error]:x264_encoder_open failed.

I tried higher bitrate like 356kbps but again I get a similar error
("estimated minimum is 371 kbps").
But what is the problem? and how can I solve that? Thanks,

John