[FFmpeg-devel] [PATCH 2/2] doc/faq: explain DAR/SAR preserving.

Kieran Kunhya kierank at obe.tv
Tue Feb 10 00:47:39 CET 2015

> +A lot of video codecs and formats can store the @emph{aspect ratio} of the
> +video: this is the ratio between the width and the height of either the full
> +image (DAR, display aspect ratio) or individual pixels (SAR, sample aspect
> +ratio). For example, CGA screens at resolution 640×350 had 4:3 DAR and 35:48
> +SAR.

The DAR for analogue compatible media (e.g. SD DVB) comes from the
active samples and not from the "full image".


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