When it is necessary to transcode an audio track, you should check if it exists for the same language and select it automatically. I mean, we have a movie with 3 audio tracks:   1. DTS Spanish 2. AC3 Spanish 3. AC3 English   If our selected language is Spanish and the server requires transcoding DTS to AC3, I think it is more logical to automatically select the AC3 track instead of transcoding DTS to AC3. This is interesting using very low power NAS.   If it's a complex task, maybe it's