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Is it possible to determine the preset of an encoding via mediainfo?
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Determine the preset "of an encoding", in the general case? Nope. What is "preset" even supposed to mean, in the general case?
If we are talking
specifically about
H.264 (AVC) streams that have been encoded by
x264, then you
can determine the x264 settings that were used to create that particular stream, e.g. via MediaInfo.
This is possible, because the x264 encoder software happens to "embed" its settings into the produced H.264 stream as meta data (custom SEI message).
But keep in mind that the effective x264 settings, that were used for a particular encode, are the result of the
combination of the selected "--preset"
and the selected "--tune" – plus any options that were set
manually on top!
Having said that, if you want to figure out the closest preset/tune combination for the particular x264 settings of a given encode, then you should have a look at the x264 help screen:
https://pastebin.com/BVnttbZC
For example, "me=umh" is only used in the "slower" and "slowest" presets, but these presets also use "ref=8" and "ref=16" – which already tells us that
none of your examples above
exactly matches one of x264's presets
(Either that, or they were created with some old version of x264; the presets have changed over time)
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Which setting would be better in your point of view for an action movie?
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As always:
Set "--tune" to whatever matches the type of footage your are encoding, set "--preset" to the
slowest preset that you can afford, and finally adjust "--crf" until the resulting quality matches your demands.
That's pretty much it
