[FFmpeg-devel] [PATCH] avdevice/decklink: adjust for timecode lag

Devin Heitmueller dheitmueller at kernellabs.com
Tue Aug 20 16:22:54 EEST 2019


> A couple of follow-up Qs:
>
> Is auto-detection available for all Decklink devices?

No, but AFAIK it is for all devices which support SDI.  Generally it's
the older analog capture devices which don't support it.

> For those for which it is available, are there any edge cases in which
> it sets inaccurate mode?

I don't trust the existing detection code enough to use it in
production.  It often fails to detect and thus ffmpeg will exit at
startup.  Also, there are cases where it will misdetect 1080i59 as
1080p30 depending on the card.  It's been on my TODO list for a while
to make that code more robust (I believe I know what most of the
issues are), but it hasn't been critical for any of my use cases.

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com


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