Set YUYV as the default frame format.

[ayakoakasaka]

This implementation assumes that the default environment is set to YUYV, but that's not the case in my setup. Therefore, I want to set YUYV explicitly as the default. Interestingly, even though this setting returns an error, it applies successfully in behavior.

[yamt]

This implementation assumes that the default environment is set to YUYV, but that's not the case in my setup. Therefore, I want to set YUYV explicitly as the default. Interestingly, even though this setting returns an error, it applies successfully in behavior.

where is the YUYV assumption?

[yamt]

can you please investigate a bit and at least report a bug before adding a workaround?

[ayakoakasaka]

I see

[ayakoakasaka]

wasi-sensor-discussion/host_wasmtime/src/nokhwa.rs

Lines 84 to 90 in dc4a571

	let (pixel_format, byte_per_pixel) = match buffer.source_frame_format() {
	FrameFormat::YUYV => (wasi::buffer_pool::data_types::PixelFormat::Yuy2, 2),
	_ => {
	println!("NokhwaDevice dropping a frame with unimplemented format");
	return;
	}
	};

is accepting YUYV only so far

[yamt]

wasi-sensor-discussion/host_wasmtime/src/nokhwa.rs

Lines 84 to 90 in dc4a571

	let (pixel_format, byte_per_pixel) = match buffer.source_frame_format() {
	FrameFormat::YUYV => (wasi::buffer_pool::data_types::PixelFormat::Yuy2, 2),
	_ => {
	println!("NokhwaDevice dropping a frame with unimplemented format");
	return;
	}
	};

is accepting YUYV only so far

the intention here is to pass frames as they are.
not convert everything to YUYV.
what pixel format are you seeing here?

[ayakoakasaka]

In my case, it seems MJPG

ioctl: VIDIOC_ENUM_FMT
Type: Video Capture

    [0]: 'MJPG' (Motion-JPEG, compressed)
    [1]: 'YUYV' (YUYV 4:2:2)

[yamt]

In my case, it seems MJPG

ioctl: VIDIOC_ENUM_FMT
Type: Video Capture

    [0]: 'MJPG' (Motion-JPEG, compressed)
    [1]: 'YUYV' (YUYV 4:2:2)

i've heard that mjpeg is somehow commonly used for usb cameras.
i guess it makes sense to support it natively.

[ayakoakasaka]

ok. I understand your opinion

[yamt]

@ayakoakasaka can you try #22?

[ayakoakasaka]

Yes. #22 solved my problem.
Thank you. I will close this PR