[opus] opusenc for ambisonics?

[Marc Lavallée]

Hi Andrew,

I suspect that the configure option should be enable-ambisonics (instead
of enable_ambisonics), but for each of opus, libopusenc, opusfile and
opus-tools git repos (on master branch), when I try "./configure
--enable-ambisonics", I get this error message:

configure: WARNING: unrecognized options: --enable-ambisonics

Thanks for your help.

Marc

Le 19-12-18 à 11 h 52, Andrew Allen a écrit :
> Hi Marc,
>
> In order to use the ambisonics API, if you haven't already, you will
> need to activate the enable_ambisonics build flag during configuration.
> Then, when encoding the file, make sure to manually select mapping
> family 3 since opus does not auto-detect ambisonic files.
>
> Let me know if you have any questions!
>
> Cheers,
> Andrew
>
> On Tue, Dec 17, 2019 at 7:16 PM Marc Lavallée <marc at hacklava.net
> <mailto:marc at hacklava.net>> wrote:
>
>     I compiled the latest (git master) of opus, libopusenc, opusfile and
>     opus-tools:
>
>     $ opusenc --version
>     opusenc opus-tools 0.2-8-g4976421 (using libopus 1.3.1-4-gad8fe90d)
>
>     I tried to encode a 3rd order Ambisonics wav file with the standard
>     Ambix (ACN-SN3D) format; opusinfo is reporting :
>
>     Streams: 16, Coupled: 0
>         Channel Mapping Family: 255 Map: [0, 1, 2, 3, 4, 5, 6, 7, 8,
>     9, 10,
>     11, 12, 13, 14, 15]
>
>     How to encode the file so that the Mapping Family is 3, as suggested
>     here ? : https://people.xiph.org/~jm/opus/opus-1.3/
>
>     Marc
>
>
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