Batchfile, for-loop, if-cases, call, rename, ffmpeg

Hi,mit einem Batchfile sollen Videodateien in ein anderes Format umgewandelt werden.Könnt Ihr mir hier weiterhelfen?@echo offREM loop through current folder and its subfolders and get each filefor /r %%i in *.* do REM if file is a video call the convert-sectionif %%~xi EQU .mp4 call :convertif %%~xi EQU .avi call :convertif %%~xi EQU .mkv call :convert:newIterationpauseexit:convertREM temporarily save file-nameset name = "%%~ni"REM temporarily save file-extension, the dot is included e.g.: .mp4set extension = "%%~xi"REM rename original filerename "%%~nxi" "%name%tmp%extension%"REM conver