Streaming from the Mac to Apple TV would be possible on a local network as long as the device as able to communicate with each other. It's also possible to set up a Mac so it is accessible over the internet which would allow devices on different networks to connect, but this is a bit more involved and a bit slower since the streaming would need to take place over the internet. A guide with more info on setting this up in Infuse can be found here.
Overview Infuse is able to connect to many different devices using SMB, NFS, FTP, SFTP, FTPS, FTPES, UPnP, DLNA, and WebDAV to browse, download (iOS/macOS/visionOS only), and play videos. Enable Fi...
support.firecore.com
Yes, LPCM is a lossless format so there is no loss in quality. If you have lossy Atmos files (such as E-AC3 with Atmos) then Infuse can play these directly without having to do any conversion. More info on the available audio options can be found in this guide.
Overview Infuse supports up to 7.1 channels of 24-bit 48KHz audio in a wide variety of audio codec formats. Dolby Atmos Infuse supports Dolby Atmos when using E-AC3 audio tracks. To take full advan...
support.firecore.com
In general, Infuse will play all videos in their native format without any conversion of transcoding which allows for the highest possible video quality. MKV files are fully supported.