Compile issue on linux

[DomtronVox]

OS

Linux, Ubuntu 22.04.2 LTS

Rust Version

$ rustup update
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'
info: checking for self-update

   stable-x86_64-unknown-linux-gnu unchanged - rustc 1.70.0 (90c541806 2023-05-31)
  nightly-x86_64-unknown-linux-gnu unchanged - rustc 1.72.0-nightly (371994e0d 2023-06-13)

info: cleaning up downloads & tmp directories

Cargo.toml Dependency line

nokhwa = {version = "0.10.4", features = ["input-native", "output-wgpu"]}

Compile Error

   Compiling nokhwa-core v0.1.1
error[E0308]: mismatched types
   --> /home/domtron/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nokhwa-core-0.1.1/src/traits.rs:236:32
    |
236 |                 bytes_per_row: width_nonzero,
    |                                ^^^^^^^^^^^^^ expected `Option<u32>`, found `Option<NonZeroU32>`
    |
    = note: expected enum `Option<u32>`
               found enum `Option<NonZeroU32>`

error[E0308]: mismatched types
   --> /home/domtron/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nokhwa-core-0.1.1/src/traits.rs:237:33
    |
237 |                 rows_per_image: height_nonzero,
    |                                 ^^^^^^^^^^^^^^ expected `Option<u32>`, found `Option<NonZeroU32>`
    |
    = note: expected enum `Option<u32>`
               found enum `Option<NonZeroU32>`

For more information about this error, try `rustc --explain E0308`.
error: could not compile `nokhwa-core` (lib) due to 2 previous errors

Reproduction

• $ cargo new test_nokhwa
• add nokhwa = {version = "0.10.4", features = ["input-native", "output-wgpu"]} to Cargo.toml dependencies section.
• $ cargo run

Comments

I tried all of the different versions between 0.10.0 to 0.10.4 and 0.9.2. Also tried several specific commits to see if I could find one that worked.

I am trying to build this with eframe to use along side egui, but the error shows up in a fresh project with just nokhwa as indicated in the Reproduction section.

Really confused on what I'm doing wrong.

[stolinski]

@DomtronVox did you find a work around? Also stuck here.

[OlivierLDff]

Just use github dependency:

[dependencies.nokhwa]
git = "https://github.com/l1npengtul/nokhwa.git"
rev = "ea971242a888987222375189fb78c84fa85e5a4e"

[stolinski]

Just use github dependency:

[dependencies.nokhwa]
git = "https://github.com/l1npengtul/nokhwa.git"
rev = "ea971242a888987222375189fb78c84fa85e5a4e"

Dang. Still getting the same with that version.

Compiling nokhwa-core v0.1.2 (https://github.com/l1npengtul/nokhwa.git?rev=ea971242a888987222375189fb78c84fa85e5a4e#ea971242)
error[E0308]: mismatched types
   --> /Users/scotttolinski/.cargo/git/checkouts/nokhwa-66b597f0abb1b795/ea97124/nokhwa-core/src/traits.rs:230:32
    |
230 |                 bytes_per_row: width_nonzero,
    |                                ^^^^^^^^^^^^^ expected enum `Option`, found `u32`
    |
    = note: expected enum `Option<u32>`
               found type `u32`
help: try wrapping the expression in `Some`
    |
230 |                 bytes_per_row: Some(width_nonzero),
    |                                +++++             +

error[E0308]: mismatched types
   --> /Users/scotttolinski/.cargo/git/checkouts/nokhwa-66b597f0abb1b795/ea97124/nokhwa-core/src/traits.rs:231:33
    |
231 |                 rows_per_image: height_nonzero,
    |                                 ^^^^^^^^^^^^^^ expected enum `Option`, found `u32`
    |
    = note: expected enum `Option<u32>`
               found type `u32`
help: try wrapping the expression in `Some`
    |
231 |                 rows_per_image: Some(height_nonzero),
    |                                 +++++              +

For more information about this error, try `rustc --explain E0308`.
error: could not compile `nokhwa-core` due to 2 previous errors

[DomtronVox]

@DomtronVox did you find a work around? Also stuck here.

I did not. Even tried going into the code to fix the specific error but it just made more errors and I'm not familiar enough with nokhwa to figure out what exactly it should have there. But I also haven't messed with it since then.

However, it does look like OlivierLDff's suggestion fixed it for me, maybe.

Just use github dependency:

[dependencies.nokhwa]
git = "https://github.com/l1npengtul/nokhwa.git"
rev = "ea971242a888987222375189fb78c84fa85e5a4e"

I don't have time to test it more right now, but it seems to have built fine using that specific checkout.

[stolinski]

It builds for me until I add features = ["input-native", "output-wgpu"] then it fails with the same error. If it's working for you now, it's probably because I'm on MacOS trying this. I'll have to open a 2nd issue. I ended up downgrading to =0.10.0 and was able to build on MacOS

[OlivierLDff]

I haven't tried wgpu feature so yes maybe it is broken

[anselanza]

Wow, I'm really struggling to get any kind of example working. I'm also on MacOS.

After lots of fiddling I settled on

[dependencies]
nokhwa = { version = "=0.10.3", features=["input-native","output-threaded"]}

which at least got rid of compile-time errors.

Then I tried to use the example from ./examples/threaded-capture/src/main.rs and that compiled but immediately returns runtime errors such as thread 'main' panicked at 'calledResult::unwrap()on anErrvalue: ProcessFrameError { src: NV12, destination: "RGB", error: "bad input buffer size" }', src/main.rs:47:56

[mischa-robots]

Jetson Nano, Arm64, Ubuntu18 (L4T)

I can confirm that this does not compile with the above error:

[dependencies.nokhwa]
version = "0.10.4"
features = ["input-native", "output-wgpu"]

While this does compile:

[dependencies.nokhwa]
version = "0.10.4"
features=["input-native","output-threaded"]

@anselanza thank you a lot for the hint.