Vanilagy
commented
3 months ago Thank you!
I'll take you down the path of how I would typically find out this stuff:
All of the codecs available in the Web Codecs API have a "registration" page you can find on google. Here's the one for HEVC:
https://www.w3.org/TR/webcodecs-hevc-codec-registration/
In §1, it specifies the codec string to be:
The codec string begins with the prefix "hev1." or "hvc1.", with a suffix of four dot-separated fields as described in Section E.3 of [iso14496-15].
This is where it starts leading you down the spec rabbit hole, that's how it goes with these media codecs. These spec documents typically cost around 200 CHF (Swiss Franks) to get them "the correct way", but you can typically find PDFs lying around on Google pretty easily. Here's one.
When you look at section E.3, you see the formal definition of the codec string and the meaning of all the parts:
That definition leads you even further into the spec, as you'll have to find out what all of the referenced variables are. However, the example also provides the example string hev1.1.6.L93.B0. Maybe you can try that one!
There's also this library here: https://github.com/dmnsgn/media-codecs
I'd recommend trying it! It produces these codec strings for you from simple, human-readable input.
BryanChrisBrown
This library is so cool, thanks so much for making it!
I'm trying to figure out how to use HEVC encoding, but can't seem to find any valid encoders, more of a question than an issue, but is there a web codecs call to check available encoders? or a list somewhere? I tried reading through the web codecs spec but only find the
hvc1flag, not the special magic string beyond :(