[FFmpeg-user] LPCM in DVD - 44.1/32khz sample rate?

[Paul B Mahol]

/* no traces of 44100 and 32000Hz in any commercial software or player */

On Sun, Jan 21, 2024 at 3:44 AM Andrew Randrianasulu <
randrianasulu at gmail.com> wrote:

> According to this source (vlc) lpcm dvd audio supports lower frequencies
> like 44100/32000 hz - useful for direct dv transcoding for example ....
>
> https://github.com/videolan/vlc/blob/master/modules/codec/lpcm.c
>
> see lines 524, 608
>
> Does this mean that libavcodec/pcm-dvdenc.c can be trivially extended to
> support those ?
>
> Same question for mplex. (it only supports 48/96 khz lpcm audio).
>
> I also found this table via mjpeg-users archives:
>
> https://dvd.sourceforge.net/dvdinfo/lpcm.html
>
> it lists dynamic range/gain (?) setting equations.
>
> Not mplex nor ffmpeg support setting this to anything but hardcoded 0x80
>
> This might be source of my "too loud" lpcm dvd experiments because I was
> making lpcm file via cinelerra-gg's raw pcm output format (using libsndfile
> internally).
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