Individual stripes in motion videos and motiongrams

[alexarje]

There are some occasional stripes in the exported motion video images. It may be related to #18.

This also shows up as stripes in the motiongrams.

Strange. Will test some more.

[alexarje]

I can also see that the program adds a line on the right side of the previewed video during the analysis (and this line is not in the original video, so something weird is going on).

[alexarje]

I am running the analysis on both OSX and Windows next to each other here, on the same file, and this line can only be seen on OSX. Strange!

[aleksati]

So this line in the motion videos, motiongram and video preview window is only an issue on OSX?

[alexarje]

Yes, as far as I can tell.

[balintlaczko]

It is really strange that it happens randomly throughout the video and not at the start or the end. Hmm, hmm, will test this.

[aleksati]

Yes, I tested exporting all with 7 different videos and this line/color-artifact is only present on the "dance.mp4" video in the test_videos folder. This seems to be consistent, at least on my OS 10.13.6. I also tried with other .mp4 videos with h264 and AAC codecs but was unable to recreate the same artifacts.. Wierd.

[alexarje]

If we cannot reproduce it with any other videos, I don't think it is worth spending a lot of time on it. Strange, though. This dance video has been my standard test video since 2005...

[aleksati]

Indeed. But let's keep this issue open a little longer in case we experience it, or related bugging, while doing more tests

[aleksati]

Now I was suddenly able to reproduce this problem on a large scale. Although, I don't what I did. They all look like this now, pretty consistently, in both batch and file export. I have some ideas about what it could be so I will do some more testing.

[balintlaczko]

Oi! That looks very mysterious... it looks like as if there were a lot of dropped frames during the render, but I don't exactly see how that could be possible with the framedump method..