Change audio streaming code to pad TS files with zeroes

[aserfass-msft]

The TS files are saved in the format "live001.ts" but there are usually about 2,000 TS files in one of the AWS folders. This causes sorting issues since:

"live100.ts" will sometimes come before
"live1000.ts".

Padding "live100.ts" to "live0100.ts" or "live00100.ts" should fix this.