January 2019 – Records And Memorys

January 30, 2019

多个wav文件连播， codec不一致的问题

起因是：

hi supporter

when i add multi file to playAttributes by :

PlayAttributes.AddPlayFilePath(“file://C:/wavfile1.wav);
PlayAttributes.AddPlayFilePath(“file://C:/wavfile2.wav);
PlayAttributes.AddPlayFilePath(“file://C:/wavfile3.wav);

and start to play them together :
in_pCallLeg->PlayStream( PlayAttributes );

in streamserver ‘s log , I find :

29th, 16:36:49.722+0800 TBERR SS: StreamServerAttachTranscodingToPlay: Playing multiple file segments with different codec is not supported.

could you tell me how to check wav file ‘s codec or how to change their codec to same ?

一共4个文件，一旦连播，什么也听不到，并立即引发 streamplayingdone事件

这4个文件在windows 或者 andacity 看不出任何格式不同

后来在 linux 机器，用 file + filename , 发现

其中有一个文件的格式是： mu-law, 而其他都是 a-law

所以导致了 codec 不同，

解决方法是：用 audacity 把 mu-law导出为a-law

January 15, 2019December 18, 2019

Mongo DB

command line 进入 C:\Program Files\MongoDB\Server\3.4\bin , 打： mongo
显示所有 database : show dbs
use database : use dbname
显示 table , in mango , table 叫做 collection : show collections
table filter :

db.KLSite.find({"Area":"INDONESIA MOBILE TELKOMSEL"})

1	db.KLSite.find({"Area":"INDONESIA MOBILE TELKOMSEL"})

*** 怎么模糊filter ?

in command line : it is :

db.KLSite.find({"Area":/DONESI/})

1	db.KLSite.find({"Area":/DONESI/})

in c# program , should be :

            var collection = MyMongoHelper._database.GetCollection<BsonDocument>(sCollection);
            //var filter = new BsonDocument();
            //filter.Add("Area", @"/" + sArea + @"/");
            //filter.Add("Area",@"/INDONESIA/");
            //filter.Add("Enabled", 1);

            var filter = Builders<BsonDocument>.Filter.Regex("Area", new BsonRegularExpression(sArea));
            

            //var filter = "{ FirstName: 'Peter'}";
            using (var cursor = await collection.FindAsync(filter))

var collection = MyMongoHelper._database.GetCollection<BsonDocument>(sCollection);

//var filter = new BsonDocument();

//filter.Add("Area", @"/" + sArea + @"/");

//filter.Add("Area",@"/INDONESIA/");

//filter.Add("Enabled", 1);

var filter = Builders<BsonDocument>.Filter.Regex("Area", new BsonRegularExpression(sArea));

//var filter = "{ FirstName: 'Peter'}";

using (var cursor = await collection.FindAsync(filter))

来源于：

https://stackoverflow.com/questions/8382307/mongodb-c-sharp-query-for-like-on-string

January 2, 2019

在 windows 10 启动时，显示 there are no interface on which a capture can be done

一开始以为是不支持无线wifi网络，后来发现：是权限问题，应该以administrator启动