feat: encoder pro max

[clearlysid]

This PR is a big one. It gets rid of FFmpeg in favour of OS-based encoders for the preview generation. This makes our binary even smaller, and makes the distribution and bundling proceses easier. Under the hood, It uses a custom Swift package for macOS and windows-capture encoder for Windows

TODOs:

1. clean up swift code
2. create BGRA encoding for mac encoder (currently it only works on YUV)
3. improve quality, colour config and codec of mac encoder
4. try building final binary

[clearlysid]

For the macOS encoder, we can use my https://github.com/clearlysid/bh-encode/tree/main as a reference point for testing. Currently the problem is that I have only created the encoder for YUVFrames captured in Mac. However, for Micro's usecase Gifski will prefer to have BGRA (i think, need to confirm).

The encoder will not work until we support that format also. This PR cannot be merged to main until that feature is complete.

[clearlysid]

oops

[clearlysid]

atleast it is fast 😂

[anubhavitis]

Not blurry at my end 🤔

[anubhavitis]

Gif encoding is working as well :)

[Pranav2612000]

oops

Was this resolved? If not, I can help.

[clearlysid]

It is resolved on my machine, yup. Changed byteStride to width * 4 like we'd done somewhere in scap. The Stride somehow seems to be platform dependent though, I never figured out how it works.

For eg: in @anubhavitis's machine it was working properly even before I made the stride fix. Does that mean his version would be broken now? 🤔

[Pranav2612000]

It is resolved on my machine, yup. Changed byteStride to width * 4 like we'd done somewhere in scap. The Stride somehow seems to be platform dependent though, I never figured out how it works.

For eg: in @anubhavitis's machine it was working properly even before I made the stride fix. Does that mean his version would be broken now? 🤔

We can get on a call to debug this if this doesn't work.
I think the * 4 was for each of RGBA.
If I'm not wrong the problem arises because the capturer adds extra black pixels if the width is not a multiple of 4. Trying to move the original width in this scenario would mess everything up.

Again, if it's working no need to touch it. But if we encounter errors, I'll be happy to help. I'll also test it out with different values.