[FFmpeg-user] ITU-R BS.1770-1 (Netflix) audio measurement

Bouke bouke at editb.nl
Wed Aug 11 13:18:04 EEST 2021

> On 11 Aug 2021, at 09:01, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>> Am 10.08.2021 um 11:03 schrieb Bouke <bouke at editb.nl>:
>> I'm using the R128 functionality now, but Netflix wants sound to be Dolby dialogue-gated measured.
>> Seems that the needed Dolby code is free now.
> Very generally, this was unlikely, after following the links you provided, it’s not correct.
> („free“ has more than one meaning, on a mailing list that deals with open source software, the interpretation „no money needed“ is not relevant.)

Hi Carl Eugen,
Sorry, my bad, I should have seen that one coming.

Nevertheless, I can see some possibilities:
Redo / reverse engineer the dialog gating with ’some’ filter, and implement 1770-1.
It does not need to be exact the same as Dolby wants, as Netflix allows for +/- 2 LU. (And that’s a lot I woud think.)

Another option perhaps could be that I pay someone for a custom version that I can distribute. (In which case I need to do the Dolby dance.)

What do you think?


> Carl Eugen
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