Hi,
For downloading EAC3 5.1 audio, I will ask the dev to check it again.
Yes, the new released Amazon video should be downloaded as 1080p video (re-encoding mode) + download EAC3 audio track.
There is an issue with the encoded files from Amazon Prime Video. They play very jerky, although they have the correct framerate (23,98, 24 or 25 fps...). There must be something wrong with the encoding settings in SF.
For the jerky problem, we will try more.
And please tell us more information, the PC configuration, video link.
Wilson