[FFmpeg-devel] [PATCH v2] Add "sar" alias to "aspect" option of video encoders

[Andrey Utkin]

On Thu, Jul 14, 2016 at 05:27:08PM +0000, Carl Eugen Hoyos wrote:
> Andrey Utkin <andrey_utkin <at> fastmail.com> writes:
> 
> > It is impossible to pass "aspect" parameter to encoder from ffmpeg 
> > CLI because option from lavc/options_table.h is eclipsed by option 
> > with same name in ffmpeg_opt.c, which has different meaning (DAR, 
> > not SAR).
> 
> Wasn't the old behaviour intended because it assured you cannot 
> pass contradicting options to the libraries via ffmpeg?

I don't think so.
Proper way to avoid contradiction is explicit check in code.
It is a usability flaw to be unable to pass certain encoder option in
CLI while all other are passed finely.