Why does "zerolatency" turn my videos "green"?

[Timothy Grove]

Seemed like a good subject line to discuss over coffee!

I've added "--sout-x264-tune=zerolatency" to my transcoding chain and while my resultant videos play fine in VLC, in other players I've tried they are mostly just green (or black) with a narrow strip of discernable video along the top. Any ideas about why this would happen or how to address this issue?

[Rémi Denis-Courmont]

Maybe the other player does not support whatever the profile properly?

This forum is probably not the best place to get expertise about competing players, TBH.

[Timothy Grove]

I'm not to worried about the other players, but I was curious about the green result I was seeing in them. My problem was that I couldn't transcode very small videos without including the "zerolatency" option. I've since found that another solution is to use very small framecounts for frametype lookahead (sout-x264-lookahead=5) or to disable mb-tree ratecontrol altogether. I don't get green videos with these fixes.

[Jean-Baptiste Kempf]

zerolatency is an option that modifies quite a bit the stream type. That's probably why.