after some testing on different devices and with different media I noticed that almost all files transcode which reduces quality and sometimes makes playback shutter.
My main Playback devices are Firefox on Windows, The Emby app for Tizen(Samsung) and the Android app.
My Films and Series are all in mkv container. Most are DVD Rips in Mpeg2 Codec, some are Bluray Rips in Mpeg4 codec and I think also a few in HEVC.
Even Musicvideos in H.264 seem to transcode. All transcode to H.264(AVC) if played from Firefox on Windows, Firefox on Android and emby app on Android.
So is H.264(AVC) the codec to go for?
It makes no difference if I disable or enable subtitles.
Is there any guide or something which are the preferrable formats/codecs for which Playback device? (Video and Audio)
(The goal obviously is to get as many files to directplay as possible (sorted from important to less important 1.quality, 2.speed, 3.storagespace)
In the future there may be other devices like fire-TV stick, IOS Devices, maybe Xbox or Emby Theater added.
At the moment there Are mostly DVD Rips and FHD Bluray Rips, but I'd also like to add 4k Bluray Rips in the future (i alread read this makes some trouble in other topics).