I've encountered a scenario where someone else has programmed an ffmpeg
encoding command with flags that seem puzzling, and I'm having
difficulty understanding their purpose.
The command in question is:
ffmpeg -loglevel info -y -r 29.97 -start_number 0 -i
image_sequence_%4d.png -vcodec dnxhd -vf
format=yuv422p10,colorspace=bt709:iall=bt601-6-625:fast=1 -b:v 220M
-flags +ildct output.mov
I've been struggling to find information on what the addition of ildct
does to the output. It appears to be influencing the media to perceive
it as interlaced, even though it is, in fact, progressive. Using the
flag ildct seems counterintuitive and unproductive.
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