Li-Heng Chen (12022-09-14): > Please allow me to explain again with your example. That's say we have > an input with 20 frames (0-19), and we want to keep prime number frames > with select filter, -vf select='eq(n\,2)+eq(n\,3)+...+eq(n\,13)+eq(n\,17)' > > In the activation function, select->eof_pts is updated to n at n=4, 6, > 8, 12, 14, 18 > However, select->eof_pts is passed into ff_outlink_set_status only at > n=20, since > ff_inlink_acknowledge_status returns 1.
I understood that. And I argue it is wrong. > Regardless of my logic, this behavior looks weird to me. In my opinion, > -vf select='eq(n\,24),fps=25/1' should produce the same result as just having > -vf select='eq(n\,24)'. However, select='eq(n\,24),fps=25/1' generates > 22 identical > frames while select='eq(n\,24)' only outputs one frame... Trick question: testsrc=r=25:d=4,select='gte(n\,0)*gte(24\,n)+gte(n\,50)*gte(74\,n)',fps=25 How many frames do you expect on the output? Regards, -- Nicolas George
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