[FFmpeg-user] How to extract core DTS / DCA stream from a DTS 96/24 stream without re-encoding

[Paul B Mahol]

On 5/19/18, Onetel <tghewett2 at onetel.com> wrote:
> I have a DVD with a DTS 96/24 stream (Peter Gabriel - Play) but where this
> has a known authoring error where this stream is very quiet. Other owners
> have reported the same problem, however some who have audio systems which
> can only decode the core / legacy DTS stream (equipment too old for DTS
> 96/24) say that it plays fine, so the problem seems to be specific to the
> 96/24-enhanced part of the stream.
>
> So I want to extract the core DTS stream to be able to play it properly. Is
> there a way to get it extracted and have the 96/24-enhanced information
> discarded, without any re-encoding? In essence I want to give the option
> "-acodec copy_legacy_only".

Yes, use dca_core bitstream filter. There is documentation on web.