可以正常运行

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "rust_v4l2"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+fltk = "1.4.36"
+image = "0.25.5"
+rscam = "0.5.5"

src/main.rs

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+extern crate rscam;
+use fltk::{
+    app::App,
+    enums::ColorDepth,
+    frame::Frame,
+    prelude::{GroupExt, WidgetBase, WidgetExt},
+    utils,
+    window::Window,
+};
+use image::buffer::ConvertBuffer;
+use rscam::{Camera, Config};
+use std::io;
+
+fn main() -> io::Result<()> {
+    let app = App::default();
+    let mut wind = Window::new(100, 100, 400, 300, "Hello from rust");
+    let mut frame = Frame::default_fill();
+    wind.end();
+    wind.show();
+    // app.run().unwrap();
+    // 打开摄像头设备
+    let mut camera = Camera::new("/dev/video0").unwrap();
+
+    // 配置摄像头参数
+    camera
+        .start(&Config {
+            interval: (1, 30),      // 设置帧率为 30fps
+            resolution: (640, 480), // 设置分辨率为 640x480
+            format: b"MJPG",        // 设置图像格式为 MJPG
+            ..Default::default()
+        })
+        .unwrap();
+
+    loop {
+        // 捕获一帧图像
+        match camera.capture() {
+            Ok(data) => {
+                let img = image::load_from_memory(&data).unwrap();
+                let rgb_data = img.to_rgb8();
+
+                let fltk_image = fltk::image::RgbImage::new(
+                    &rgb_data.as_raw(),
+                    rgb_data.width() as i32,
+                    rgb_data.height() as i32,
+                    ColorDepth::Rgb8,
+                )
+                .unwrap();
+                frame.set_image(Some(fltk_image));
+                frame.redraw();
+            }
+            Err(e) => {
+                eprintln!("捕获错误: {}", e);
+                continue;
+            }
+        }
+        app.wait();
+    }
+}

src/window.glade

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+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk+" version="3.0"/>
+  <object class="GtkWindow" id="window">
+    <property name="title">摄像头视频流</property>
+    <property name="default-width">640</property>
+    <property name="default-height">480</property>
+    <child>
+      <object class="GtkImage" id="image"/>
+    </child>
+  </object>
+</interface>
+