1.遇到的问题

今天遇到linphone-android sdk需要解决语音编码问题，需要指定编码。查了下配置，里面没有发现类似的配置。

## Start of factory rc

# This file shall not contain path referencing package name, in order to be portable when app is renamed.
# Paths to resources must be set from LinphoneManager, after creating LinphoneCore.

[net]
mtu=1300
force_ice_disablement=0

[sip]
guess_hostname=1
register_only_when_network_is_up=1
auto_net_state_mon=1
auto_answer_replacing_calls=1
ping_with_options=0
use_cpim=1

[sound]
#remove this property for any application that is not Linphone public version itself
ec_calibrator_cool_tones=1

[video]
displaytype=MSAndroidTextureDisplay
auto_resize_preview_to_keep_ratio=1

[misc]
enable_basic_to_client_group_chat_room_migration=0
enable_simple_group_chat_message_state=0
aggregate_imdn=1
notify_each_friend_individually_when_presence_received=0

[app]
activation_code_length=4
prefer_basic_chat_room=1

[assistant]
xmlrpc_url=https://subscribe.linphone.org:444/wizard.php

[lime]
lime_update_threshold=-1

## End of factory rc

2.解决方法 

• 查看linphone安卓端支持的编码

• 查到一个指定编码的方式，之后试了下是可以的

• 根据自己的需要调整参数 

//音频部分, 这里增加了一个遍历, 用于设置指定的音频格式.
//h264, no VP8 fixed outgoing call no video.
//音频部分, 这里增加了一个遍历, 用于设置指定的音频格式.
//h264, no VP8 fixed outgoing call no video.
val payloads: Array<PayloadType> = core.audioPayloadTypes
for (i in payloads.indices) {
     //Payload:null, VP8/90000/0, A VP8 video encoder using libvpx library., VP8
     //Payload:profile-level-id=42801F, H264/90000/0, A H264 encoder based on MediaCodec 
     API., H264
     val pt: PayloadType = payloads[i]
     //判断是否指定的音频格式.我这里指定PCMA格式
     val goodPayload: Boolean = "PCMA" == pt.mimeType
     pt.enable(goodPayload)
}