转自H264乐园
请教x264里面h->param.rc.b_stat_read 参数的含义
本帖最后由 xinyancode 于 2010-3-31 09:53 AM 编辑
请问x264里面：
h->param.rc.b_stat_read 参数是什么含义？
这是对它的赋初值：
h->param.rc.b_stat_read = 0;
在x264程序里面有很多地方都用这个参数作为判断条件，如：
if( h->param.rc.b_stat_read )
{
。。。。
}
定义的时候是这样的：
int b_stat_read; //Read stat from psz_stat_in and use it
psz_stat 紧跟着定义的：
char *psz_stat_in;
但是整个程序里面好像都是0，我没看明白它后面的那句注释
//Read stat from psz_stat_in and use it，这是什么意思？
谁能帮我指点一下?
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Fastreaming
中级会员
2#
发表于 2010-3-31 11:56 AM | 只看该作者
>> h->param.rc.b_stat_read 参数是什么含义
Indicate the PASS status
>>//Read stat from psz_stat_in and use it，这是什么意思？
in pass 1 mode, x264 will generate the stats information and write them into psz_stat_out
in pass 2 mode, x264 will read the stats information from (psz_stat_in) pass 1, or pass 3 for best ratecontrol decision
in pass 3 mode, x264 will read the stats information from pass 1 (psz_stat_in, psz_stat_out) for better ratecontrol decision, x264 also write the newer stats information into psz_stat_out
First Pass:
rc.b_stat_read == 0, rc.b_stat_write = 1
Third Paas:
rc.b_stat_read = 1, rc.b_stat_write = 1
Second Pass:
rc.b_stat_read = 1, rc.b_stat_write = 0