Camera::new panicking on macOS using C922 webcam

[Brendonovich]

Here we are calling Camera::new
https://github.com/CapSoftware/Cap/blob/8abfc996cd7077058bc610e1dd8f76677d4e44db/apps/desktop/src-tauri/src/camera.rs#L124-L126

When accessing the builtin Macbook Pro camera everything works fine, but with a C922 connected via USB nokhwa panics:

   0: rust_begin_unwind
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/std/src/panicking.rs:665:5
   1: core::panicking::panic_nounwind_fmt::runtime
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:112:18
   2: core::panicking::panic_nounwind_fmt
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:122:5
   3: core::panicking::panic_nounwind
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:221:5
   4: core::panicking::panic_cannot_unwind
             at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/panicking.rs:309:5
   5: objc_exception::try_no_ret::try_objc_execute_closure
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc_exception-0.1.2/src/lib.rs:30:5
   6: RustObjCExceptionTryCatch
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc_exception-0.1.2/extern/exception.m:10:9
   7: objc_exception::try_no_ret
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc_exception-0.1.2/src/lib.rs:44:19
   8: objc_exception::try
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc_exception-0.1.2/src/lib.rs:67:9
   9: objc::exception::try
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/exception.rs:8:5
  10: objc::message::platform::send_unverified
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/message/mod.rs:12:9
  11: objc::message::send_message
             at /Users/brendonovich/.cargo/registry/src/index.crates.io-6f17d22bba15001f/objc-0.2.7/src/message/mod.rs:178:5
  12: nokhwa_bindings_macos::internal::AVCaptureDevice::set_all
             at /Users/brendonovich/github.com/l1npengtul/nokhwa/nokhwa-bindings-macos/src/lib.rs:1027:17
  13: nokhwa::backends::capture::avfoundation::AVFoundationCaptureDevice::new
             at /Users/brendonovich/github.com/l1npengtul/nokhwa/src/backends/capture/avfoundation.rs:76:9
  14: nokhwa::camera::init_avfoundation
             at /Users/brendonovich/github.com/l1npengtul/nokhwa/src/camera.rs:461:27
  15: nokhwa::camera::init_camera
             at /Users/brendonovich/github.com/l1npengtul/nokhwa/src/camera.rs:490:47
  16: nokhwa::camera::Camera::with_backend
             at /Users/brendonovich/github.com/l1npengtul/nokhwa/src/camera.rs:55:30
  17: nokhwa::camera::Camera::new
             at /Users/brendonovich/github.com/l1npengtul/nokhwa/src/camera.rs:44:9
  18: desktop_solid_lib::camera::start_capturing::{{closure}}::{{closure}}
             at ./src/camera.rs:126:30

Looks like one of these msg_send are panicking, I'm at a loss as to why.

nokhwa/nokhwa-bindings-macos/src/lib.rs

Lines 1022 to 1027 in 7ee36fe

	let _: () = unsafe {
	msg_send![self.inner, setValue:min_frame_duration forKey:active_video_min_frame_duration]
	};
	let _: () = unsafe {
	msg_send![self.inner, setValue:min_frame_duration forKey:active_video_max_frame_duration]
	};

nokwha version: 0.10.4
macOS version: 14.6.1

[l1npengtul]

The MacOS backend was written with pure tears and pain. I don't know either. Someone else wrote a complete from-scratch rewrite of macos backend using newly available crates, this will probably be fixed 0.11