some images "flicker"

[dneise]

example:

https://fact-project.org/overview_video/2018/06/06/20180606.mp4

image in topmost row, 2nd from the left flickers ...

I wonder if we can do a simple check like:

If the image is completely black:
    try to reload it.

@maxnoe @relleums what do you think?

[maxnoe]

Black images are produce by the script if the image could not be downloaded.

We could use retrying for the download.

[dneise]

Could we instead of putting a black picture reuse the previous picture in order to reduce optical noise?

[maxnoe]

This would require having state, which we do not have at the moment

[maxnoe]

And I think it's kind of dangerous to show the last image for longer periods of time, so you also have to have an upper limit on how long you show the last image before you switch to a blank image

[dneise]

I remember in the past we sometimes had the case of a "frozen image" .. because of some upstream error, which prevented the correct loading of the image.

By dangerous I assume you mean:
What if a reporter always looks at a nice weather image not realizing that it is one day old? The timestamp is certainly too small to read. I agree here. But I would argue that a still image embedded into non-still images is pretty easy to spot. So I would not value this danger too high.

For me this flickering basically results in not looking at that part of the image .. I just look at the other parts ... it is partly involuntary self-preservation, I believe.

Other people might be less affected by this flickering.

[kbruegge]

Hello. I have the feeling that the 3rd picture in the center row flickers much more than it did the last time I was on shift. No idea why. Just want to mention it.