[FFmpeg-user] Decklink timestamp_align, what should it do?

Marton Balint cus at passwd.hu
Sun May 2 12:02:04 EEST 2021

On Sun, 2 May 2021, Bouke wrote:

> From the manual:
> 'timestamp_align
> Capture start time alignment in seconds. If set to nonzero, input frames are dropped till the system timestamp aligns with configured value
> Ok, when I put -timestamp_align in my command, it  does wait ‘a bit’ before starting capture.
> That’s what I’m after, but i have no clue how long it waits. It’s not a ‘wait X seconds’ for sure.

It waits until UTC modulo timestamp_align becomes 0. So for 60 it 
waits until a full minute boundary is reached.


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