[FFmpeg-user] DeckLink Output Controls

Marcelo Boufleur mboufleur at gmail.com
Mon Oct 10 05:48:27 EEST 2016

> SDI is 20bit 48k audio only. There’s really no good reason for anything
> else.
> Technically SDI also supports 48048 and 47952 to allow for pull up/down,
> but I
> think that is done by manipulating the clock rather than explicitly
> changing
> the sample rate.

SD-SDI PCM Audio is 20 bits, but it can also support 24 bits according to
Sampling rate can also range from 32Khz to 48Khz.

For HD, there's also SMPTE 299M which mandates 24 bit audio, and also
sampling rates range from 32Khz to 48Khz.

You can also have 20 bit in HD (and also SD) in the form of non-audio PCM
Data, using SMPTE 337M format (for Dolby-E and other compressed formats
described in SMPTE 338M).

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