这是在CLI界面的一个错误信息
[Oct 6 04:49:38] WARNING[1519]: channel.c:3851 set_format: Unable to find a codec translation path from 0x100 (g729) to 0x40 (slin)
[Oct 6 04:49:38] WARNING[1519]: indications.c:139 playtones_alloc: Unable to set 'Gtalk/yupengvs-af9f' to signed linear format (write)