Quote:
Originally Posted by LoRd_MuldeR
Finally, there is the "--ratetol" option, which controls how much the ABR algorithm is allowed to diverge from the target bitrate. You can set a lower value here, but that might result in quality degradation...
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Hi, I have tried the "--ratetol" option and it works. Early, when I used the default 1.0 of ratetol, for the sequence BQMall, the final accuracy is -15%. And now I set it as 0.01,the accuracy is 0.6%.
When 1.0 was used, the QP of all frames keeps steady, but now, it fluctuates a lot.
By the Way, could you give me some suggestions about value of cplxr_sum, which is set as follows in x264:
rc->cplxr_sum = .01 * pow( 7.0e5, rc->qcompress ) * pow( h->mb.i_mb_count, 0.5 )