Hi,
Please shutdown the EMS and check the config.lua file. Under applications > rootdirectory there’s an entry for mp4BinPath. A typical setting for Windows is shown below:
mp4BinPath="..\evo-mp4writer.exe",
Either copy/rename the mp4writer binary file to the path set in config.lua, or change the path in config.lua file to point to where the mp4writer binary actually exists.
Regarding the missing audio when creating HLS, please check if the source audio is AAC or not. The EMS is compable with H.264 video and AAC audio input streams. For other input stream codecs, you can use the EMS transcoder to convert the input stream to H.264/AAC.
Cheers,
Don