2019-01-23 12:24 GMT+01:00, Steven Liu <l...@chinaffmpeg.org>:
> use a:0,agroup:aud_low,default:Yes,language:CHN
> a:1,agroup:aud_low,language:ENG
>         a:2,agroup:aud_high,default:YesYes,language:CHN
> a:3,agroup:aud_high,language:ENG

I know this is late but shouldn't the language be taken from the
metadata if != unknown?

Carl Eugen
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