May we have an example for showing how to get input device for image capturing on Mac?

[WENPIN1]

Hi all,
May we have an example for showing how to get input device for image capturing on Apple MAC ?
I've tried several code snippets but it always failed on either building or finding the correct video input device.
"Thank you very much!"

e.g.

unsafe {rsmpeg::ffi::avdevice_register_all();}
let s = cstr!("rawvideo");  // avfoundation ?
let mut inf = AVInputFormat::find(s);

let file=cstr!("0:0");

let mut input_format_context = AVFormatContextInput::open(file, inf, &mut None)?;

#117

[WENPIN1]

My study till now;

$brew install sdl2

ffmpeg need sdl2 on MAC

.cargo/config.toml

[env]
FFMPEG_PKG_CONFIG_PATH = "..../tmp/ffmpeg_build/lib/pkgconfig"
RUST_BACKTRACE = "full"
FFMPEG_LIBS_DIR = "..../tmp/ffmpeg_build/lib/"
FFMPEG_INCLUDE_DIR = "..../tmp/ffmpeg_build/include/"

[build]
target = "aarch64-apple-darwin"

[target.aarch64-apple-darwin]
rustflags = [
    "-C",
    "link-arg=-undefined",
    "-C",
    "link-arg=dynamic_lookup",
    # "-C",
    # "link-arg=-lsdl2",
]

build.rs

fn main() {
    println!("cargo:rustc-flags=-l framework=GameController");  // or uncomment -sld2 in config.toml
}

test/tutorial01.rs

fn _main(file: &CStr, out_dir: &str) -> Result<()> {
    unsafe {
        ffi::avdevice_register_all();
    }
    let s = cstr!("avfoundation");
    let inf = AVInputFormat::find(s);


    fs::create_dir_all(out_dir)?;

    let mut dict = Some(
        AVDictionary::new_int(cstr!("framerate"), 30, 0)
            .set(cstr!("video_size"), cstr!("1280x720"), 0)
            .set(cstr!("pix_fmt"), cstr!("uyvy422"), 0),
    );
    let mut input_format_context = AVFormatContextInput::open(file, inf.as_deref(), &mut dict)?;

....

#[test]
fn tutorial01_test4() {
    // _main(cstr!("0:0"), "tests/output/tutorial01/mov_sample").unwrap();
    _main(cstr!("0:none"), "tests/output/tutorial01/mov_sample").unwrap();
}

$cargo test --package rsmpeg --test tutorial01 -- tutorial01_test4 --exact --nocapture

But still cannot overcome "ReadFrameError(-35)" !

-WENPIN1