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So I did a little search and this thing is a little more complicated. There is indeed a hardware limitation in Amlogic hardware that does not show mod 4 videos correctly. It supposedly repeats the last lines to make it mod 8.
But this caused me to look a little closer at the encodes on PC and I see a second different issue. This happens at the edges of the video where the black lines start.
Even if I do a perfect mod 16 crop on picture, I see a little artifact on the last line. It's not 100% smooth. So in some cases I find that if I keep a little more black lines, the encodes are better on the edges. Have you seen this? What is this encode difficulty at the edges of the video?
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