fix： 树莓派gstreamer pipeline报错
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@ -128,9 +128,9 @@ fn create_demo_config() -> Config {
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// 根据操作系统和设备类型自动选择合适的设备路径
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let device = if is_raspberry_pi {
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// 使用特定的GStreamer pipeline字符串在树莓派上适配摄像头
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// 这个pipeline使用v4l2src作为源，并确保正确初始化
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"v4l2src device=/dev/video0 ! video/x-raw,width=1280,height=720,framerate=30/1 ! videoconvert ! appsink".to_string()
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// 使用更简单的GStreamer pipeline，尝试不同配置方式和格式
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// 此pipeline尝试放宽限制，避免严格的格式约束
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"v4l2src ! videoconvert ! appsink".to_string()
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} else if std::env::consts::OS == "linux" {
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"/dev/video0".to_string()
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} else if std::env::consts::OS == "macos" {
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@ -111,17 +111,10 @@ impl CameraController {
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// 在树莓派上但没有使用GStreamer pipeline，尝试使用pipeline重新初始化
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warn!("Running on Raspberry Pi without GStreamer pipeline. Attempting to reinitialize with GStreamer...");
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// 创建GStreamer pipeline
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let device_num = self.settings.device.strip_prefix("/dev/video")
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.unwrap_or("0");
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// 创建更简单的GStreamer pipeline
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let pipeline = "v4l2src ! videoconvert ! appsink".to_string();
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let pipeline = format!(
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"v4l2src device=/dev/video{} ! video/x-raw,width={},height={},framerate={}/1 ! videoconvert ! appsink",
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device_num, self.settings.resolution.dimensions().0,
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self.settings.resolution.dimensions().1, self.settings.fps
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);
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info!("Trying GStreamer pipeline: {}", pipeline);
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info!("Trying simple GStreamer pipeline: {}", pipeline);
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self.settings.device = pipeline;
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// 使用 Box::pin 来解决递归 async 调用问题
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@ -189,17 +182,10 @@ impl CameraController {
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// 关闭当前相机
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self.camera = None;
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// 创建GStreamer pipeline
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let device_num = self.settings.device.strip_prefix("/dev/video")
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.unwrap_or("0");
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// 创建更简单的GStreamer pipeline
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let pipeline = "v4l2src ! videoconvert ! appsink".to_string();
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let pipeline = format!(
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"v4l2src device=/dev/video{} ! video/x-raw,width={},height={},framerate={}/1 ! videoconvert ! appsink",
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device_num, self.settings.resolution.dimensions().0,
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self.settings.resolution.dimensions().1, self.settings.fps
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);
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info!("Trying GStreamer pipeline: {}", pipeline);
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info!("Trying simple GStreamer pipeline: {}", pipeline);
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self.settings.device = pipeline;
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// 重新初始化相机
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@ -299,15 +285,10 @@ impl CameraController {
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let use_gstreamer = is_raspberry_pi && !device.contains("!");
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if use_gstreamer {
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// 创建GStreamer pipeline
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let device_num = device.strip_prefix("/dev/video").unwrap_or("0");
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// 创建更简单的GStreamer pipeline
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let pipeline = "v4l2src ! videoconvert ! appsink".to_string();
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let pipeline = format!(
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"v4l2src device=/dev/video{} ! video/x-raw,width={},height={},framerate={}/1 ! videoconvert ! appsink",
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device_num, 1280, 720, fps
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);
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error!("Raspberry Pi detected - trying GStreamer pipeline: {}", pipeline);
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error!("Raspberry Pi detected - trying simple GStreamer pipeline: {}", pipeline);
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// 尝试使用GStreamer打开摄像头
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match OpenCVCamera::open(&pipeline) {
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@ -54,29 +54,115 @@ impl OpenCVCamera {
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fn create_capture_from_path(path_str: &str) -> Result<videoio::VideoCapture> {
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info!("Attempting to open camera with path/pipeline: {}", path_str);
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// 检测是否为树莓派，以提供更多调试信息
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let is_raspberry_pi = std::fs::read_to_string("/proc/cpuinfo")
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.map(|content| content.contains("Raspberry Pi") || content.contains("BCM"))
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.unwrap_or(false);
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if is_raspberry_pi {
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info!("Raspberry Pi detected, will try multiple approaches to open camera");
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// 尝试列出可用的视频设备
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match std::process::Command::new("v4l2-ctl").arg("--list-devices").output() {
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Ok(output) => {
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let devices = String::from_utf8_lossy(&output.stdout);
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info!("Available video devices:\n{}", devices);
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},
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Err(e) => warn!("Could not list video devices: {}", e)
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}
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}
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// 检测是否为GStreamer pipeline (通常包含感叹号)
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if path_str.contains("!") {
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info!("Detected GStreamer pipeline, using from_file with GSTREAMER backend");
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// 如果是GStreamer pipeline，直接使用from_file方法并指定GSTREAMER后端
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// 如果是GStreamer pipeline，尝试几种不同的方法
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// 先尝试使用一个非常基本的pipeline
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let simple_pipeline = "videotestsrc ! videoconvert ! appsink";
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info!("First trying a very basic test pipeline to check GStreamer: {}", simple_pipeline);
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match videoio::VideoCapture::from_file(simple_pipeline, videoio::CAP_GSTREAMER) {
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Ok(cap) => {
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if cap.is_opened().unwrap_or(false) {
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info!("Basic GStreamer test pipeline works! Now trying the real pipeline");
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} else {
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warn!("Basic GStreamer test pipeline opened but not ready - GStreamer may not be working properly");
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}
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},
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Err(e) => warn!("Basic GStreamer test failed: {} - GStreamer may not be available", e)
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}
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// 尝试使用原始的pipeline
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match videoio::VideoCapture::from_file(path_str, videoio::CAP_GSTREAMER) {
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Ok(cap) => {
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if cap.is_opened()? {
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if cap.is_opened().unwrap_or(false) {
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info!("Successfully opened GStreamer pipeline");
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return Ok(cap);
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} else {
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warn!("GStreamer pipeline opened but not ready, will try alternative methods");
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warn!("GStreamer pipeline opened but not ready");
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}
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},
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Err(e) => {
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warn!("Failed to open with GStreamer: {}. Will try alternative methods.", e);
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}
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}
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// 如果在树莓派上，尝试不同格式的pipeline
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if is_raspberry_pi {
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let alternate_pipelines = [
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"v4l2src ! video/x-raw,format=YUY2 ! videoconvert ! appsink",
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"v4l2src ! video/x-raw,format=BGR ! videoconvert ! appsink",
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"v4l2src device=/dev/video0 ! videoconvert ! appsink",
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"v4l2src device=/dev/video0 ! video/x-raw,format=YUY2 ! videoconvert ! appsink"
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];
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for pipeline in alternate_pipelines.iter() {
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info!("Trying alternate pipeline: {}", pipeline);
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match videoio::VideoCapture::from_file(pipeline, videoio::CAP_GSTREAMER) {
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Ok(cap) => {
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if cap.is_opened().unwrap_or(false) {
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info!("Success with alternate pipeline: {}", pipeline);
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return Ok(cap);
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}
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},
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Err(e) => warn!("Failed with alternate pipeline: {}", e)
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}
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}
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}
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}
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// Try to parse as integer index first
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if let Ok(device_index) = path_str.parse::<i32>() {
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info!("Opening camera by index: {}", device_index);
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return Ok(videoio::VideoCapture::new(device_index, videoio::CAP_ANY)?);
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// 在树莓派上，先尝试v4l2直接打开以获取更多诊断信息
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if is_raspberry_pi {
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// 检查设备是否实际存在
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if std::path::Path::new(&format!("/dev/video{}", device_index)).exists() {
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info!("Device /dev/video{} exists", device_index);
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} else {
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warn!("Device /dev/video{} does not exist!", device_index);
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}
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// 尝试v4l2-ctl获取设备信息
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match std::process::Command::new("v4l2-ctl")
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.args(&["-d", &format!("/dev/video{}", device_index), "-D"])
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.output()
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{
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Ok(output) => {
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let info = String::from_utf8_lossy(&output.stdout);
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info!("Device info for /dev/video{}:\n{}", device_index, info);
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},
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Err(e) => warn!("Could not get device info: {}", e)
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}
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}
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let cap = videoio::VideoCapture::new(device_index, videoio::CAP_ANY)?;
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if cap.is_opened()? {
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return Ok(cap);
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} else {
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warn!("Device index {} opened but not ready", device_index);
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}
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}
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// Handle platform-specific device paths
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@ -129,33 +215,7 @@ impl OpenCVCamera {
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}
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}
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// 对于树莓派，可能需要指定GSTREAMER后端
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if std::fs::read_to_string("/proc/cpuinfo")
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.map(|content| content.contains("Raspberry Pi") || content.contains("BCM"))
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.unwrap_or(false)
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{
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// 尝试使用带有GSTREAMER后端的方式打开
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let gst_pipeline = if path_str.starts_with("/dev/video") {
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// 如果是设备路径，转换为gstreamer pipeline
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let num_str = path_str.strip_prefix("/dev/video").unwrap_or("0");
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format!("v4l2src device={} ! video/x-raw,width=1280,height=720 ! videoconvert ! appsink", path_str)
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} else {
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path_str.to_string()
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};
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info!("Trying to open with GStreamer on Raspberry Pi: {}", gst_pipeline);
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match videoio::VideoCapture::from_file(&gst_pipeline, videoio::CAP_GSTREAMER) {
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Ok(cap) => {
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if cap.is_opened()? {
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info!("Successfully opened camera with GStreamer on Raspberry Pi");
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return Ok(cap);
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}
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},
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Err(e) => warn!("Failed to open with GStreamer on Raspberry Pi: {}", e)
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}
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}
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// For URLs, video files, or any other path type
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// 最后尝试使用通用文件打开方法
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info!("Using generic file opening method for: {}", path_str);
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let cap = videoio::VideoCapture::from_file(path_str, videoio::CAP_ANY)?;
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