Downscaled GIF from cut recording suffers extreme loss of quality and takes up much more space than the original

[armanozak]

macOS version:
ProductName: macOS
ProductVersion: 11.6
BuildVersion: 20G165

Kap version:
Version 3.4.0 (3.4.0.1767)

Steps to reproduce

• Take a screen recording (without sound)
• Cut the recording from start and end
• Reduce the FPS to 12
• Export as GIF
• Downscale by 50%
• Export again as GIF

This does not always happen. Trying again with a different cut usually helps.

Current behaviour

The downscaled GIF is much larger.

Also, there is an extreme loss of quality. Here is how the end of the address bar of Chrome looks like:

Expected behaviour

The downscaled GIF should have a smaller size and a similar quality as before the update.

Workaround

Trying a different cut can help the size, but, so far, not the quality.

Notes

• I looked at the issue list, but I could not find anything like this.
• The issue is more noticeable on longer recordings.

[armanozak]

Some additional information: the quality loss consistently happens when the start of the recording is cut, not the end.

[nnnoel]

This commit was introduced recently bc60c67 and changes the ffmpeg import that was being used. Might be related.

[dcknight]

I am experiencing the same issue. If I convert without trimming the original then the quality is good. It appears to be only when trimming the front.

[yaustar]

I've noticed the size and quality of GIFs are worse compared to 3.3.2. I'm currently staying on this version as the downscale quality loss is too great