There are alternatives to DaVinci Studio. Some of these are very effective but even more complicated, such as VirtualDubMod, an open source software that requires programming experience to be used and does not have a support service, but just a forum where skilled users help newbies. Others are simpler, but not as accurate, since basic editing software (Pinnacle Studio, Movie Maker, Moravi Video Editor) have only basic color correction functions.
The size of the video files you will export
The size of the video files exported after the restoration depend on:
You can set them on the export stage of the editing.
If, for example, you want Full HD resolution to appreciate its quality, you don't just have to export at 1920x1080. You have to use that resolution in all the stages of the creation (shooting, editing, exporting).
But there is no need to be a perfectionist when perfectionism is useless. For example, the sequence of frames that my scanner creates can be: jpg (compressed) or tiff (uncompressed), but from various tests I made, I can say that the difference in quality is not visible.
The different stages of the video restoration
After scanning the film, I import the frame sequence into DaVinci Studio and convert it into a video at 25 fps, regardless of the native fps number (usually 18 fps for super 8 and 16mm films, and 16 fps for 8mm). In these videos, I apply a first color and brightness correction and then I analyze the segments one by one, setting up new customized corrections depending on the footage.
Once the restoration is finished, I duplicate the timeline and set the right number of frames per second, slowing the footage to 16 or 18 fps by using the Speed Warp frame interpolation of Davinci Studio, which is not available on the free version of the software (Davinci Resolve).
Then I export the movie to a format and compression (codec) compatible with all computers and televisions:
The proper resolution to export to depends on the film format. I believe that 4K on super 8 and 8mm is useless, so I use it only for 16mm films.
The video (.mov, H.264, resolution Full HD or 4K) I deliver to my customers can be imported into any editing software to add music, titles and possibly remove unwanted footage.
A .mov file exported with H.264 codec can have different compression levels which determine the final size. Talking about Full HD resolution, a half-hour video is about 2 Gb, and a 3/4-minute video which comes from 7.5 cm diameter reels, is about 300 Mb.