Hi:

Newbie here. So bear with me. Requesting the mailing list because I
could not find any documentation what I am trying to achieve
(particularly chroma/luma keyeing, trapezoid formation and others.

§1. What is a command line for a chroma key with melt (which is
possible in openshot with chroma key plugin). I found something as of
below online, but does not seem to work.

melt https://archive.org/download/IMB_SF_R35_C8/IMB_SF_R35_C8_512kb.mp4 in=400 \
    -track https://archive.org/download/IMB_SF_R19_C9/IMB_SF_R19_C9_512kb.mp4
in=450 \
    -filter chroma key=0x00ff0000 variance=0.45 \
    -transition composite

§2. How to replace a known background (video or image) from the
foregrond video with melt?

§3 How to create a trapezoid of video with melt which can be achieved
using filter, Distort >> Corners in kdenlive?

§4. What is the command for text transitions (like scrolling text or
periodic scrolling text) in melt?

I am very curious with the command line stuff. Any help appreciated! Thanks!

With warm regards,
/zenny

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