AAC already supported?

[rafael2k]

I wonder if I get a selected chrome with AAC support already in place, can mux it to a mkv?

Using codecid: "A_AAC/MPEG4/LC"

https://matroska.org/technical/codec_specs.html

[Vanilagy]

Yea should work. Not valid by the strict WebM spec, but probably still plays back correctly in many players. I didn't try AAC but I tried H.264 video and that stuff worked like a charm too.

[Vanilagy]

Note though that the file internally is labeled as "webm", not "matroska". Might need to add a flag to support raw mkv muxing then

[rafael2k]

Thanks! Reading Matroska spec, it seems I need: The docType of the EBML Header MUST be “matroska”. The EBMLMaxIDLength of the EBML Header MUST be “4”. The EBMLMaxSizeLength of the EBML Header MUST be between “1” and “8” inclusive.

I'll try. Could this option (webm or mkv) be parametrized? Thanks!

[Vanilagy]

Yeah, for sure! I mean, it's a bit weird, since this project is called webm-muxer but really is a Matroska muxer (since WebM's a subset of Matroska). Of course, adding a parameter to set Matroska or not is easy to add, but I guess it would've been better to make mkv-muxer and give that a "WebM or not" flag instead.

However, I don't wanna rename this project now. Dunno. Weird stuff. Guess WebM is more well-known in the web community anyway, so it should be fine!

[rafael2k]

Hey, don't bother about the project name. Webm-muxer it is, and WebM muxing should stay as default forever, as this is what people will want, for 99.9%. It is just a bonus having mkv muxing (and support for all WebCodecs muxing, including AAC!) : )

[Vanilagy]

Here you go :)

[rafael2k]

Yay! tks! : )