Android Debug Bridge Screen Record Batch

@ECHO off
ECHO ADB Recording Script
SET /p filename=Filename:
ECHO Great quality at 8mbps.
SET /p mbps=Bitrate(In mbps):
SET /a bitrate=%mbps%*1048576
CALL :Record
SET /a var1=0
:record
SET /a var1+=1
ECHO Recording %var1% started Filename:%filename%%var1%.mp4 at bitrate %mbps%mbps.
adb shell screenrecord /sdcard/%filename%%var1%.mp4 --bit-rate %bitrate%
GOTO :record