@kagsundaram yes, I tried a noise reduction filter but couldn’t be sure what it was doing in preview, so i just let it be. Must be the high compute requirement, now that you say, why i couldn’t really see what was going on. Thanks again!
If you use proxy while editing, you won’t see the effects in preview.
If you don’t use proxy during editing, and you do use Wavelet, you will think your computer died when you click “Play”.
Some noise reduction filters handle low-light better than others; some are tuned to fix old film or early camcorders. Wavelet is especially for the effects of low light on the sensors and software of modern cameras.
You can disable proxy and preview scaling to export a few frames (File menu - Export frame) in PNG format.
This may give you some guidance on how to proceed with the settings.
Proxy and scaling affects the result shown in the preview with these filters quite a lot.
Another option is to make a short clip where you can try out various alternatives. With this strategy you avoid rendering the whole video.
Since looking at moving or still frames is not the same, a combination of both techniques (export of a short clip + export of chosen frames) could be a strategy to achieve a workflow.
Additionally, Shotcut can export every single frame of a video as stills, so another option is to shorten a clip and export it with the “Stills” option in the export menu. The frames will be saved with an incremental name.
All these previous steps will allow a working strategy. They also allow you to see what advantages or disadvantages a filter setting has, in which conditions it works best and in which moments it is most effective.