Kap: Allow editing quality/speed in the editor

[karaggeorge]

Right now, our conversion processes use good defaults for quality. For most conversions there's two parameters:

• crf which has lower and upper limits depending on the encoder, that sets the average bitrate, therefore how lossless the quality is (0 is lossless, but documentation says that values up to 17-18 appear pretty much lossless to the human eye)

• preset which can have values like fast, slow etc, showing how much time the encoder will spend. Making it faster, makes the conversion faster sacrificing quality and size, making it slower, means that it'll take longer but it'll get smaller size and better quality.

I'm thinking we can add a small button with an icon, that pops up a popup with 2 sliders (like fps). One for each of those, labeled Quality and Speed or something like that, defaulting to our current default values.

For gif, since we're using gifsicle I think we could use lossy instead.

Not sure if that's something people want/need so we can get some feedback. Maybe our good defaults are not worth adding more options. I've just seen a bunch of software allow at least one export Quality slider, allowing adjustments to quality/size.

[sindresorhus]

A quality slider might make sense, but I think a speed thing is too much. Also important to note that nobody has actually requested a quality setting, so not sure how much demand there might be for it, especially now that we have lossy compression for GIF.

[karaggeorge]

Yeah I agree. No one has asked for it, other than noticing gif sizes being too big, but with gifsicle that might be covered. I've just been messing with ffmpeg options a lot lately and saw it as a possible feature if we get requests for it at some point