From 843dbd09c6b4b7c6f11827af1f268d4a1bd21be8 Mon Sep 17 00:00:00 2001
From: cxh <zxwl@56.com>
Date: Mon, 24 Nov 2025 16:37:53 +0800
Subject: [PATCH] 1

---
 src/rtsp_manager.cpp | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/src/rtsp_manager.cpp b/src/rtsp_manager.cpp
index 1c4edd3..9fd929f 100644
--- a/src/rtsp_manager.cpp
+++ b/src/rtsp_manager.cpp
@@ -6,6 +6,9 @@
 #include <algorithm>
 #include <thread>
 #include <chrono>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/videodev2.h>
 
 // 静态变量定义
 GMainLoop *RTSPManager::loop = nullptr;
@@ -19,6 +22,34 @@ std::mutex RTSPManager::mounted_factories_mutex;
 std::unordered_map<std::string, std::vector<GstRTSPMedia *>> RTSPManager::media_map;
 std::mutex RTSPManager::media_map_mutex;
 
+bool set_v4l2_format(const std::string &dev, int width, int height)
+{
+    int fd = open(dev.c_str(), O_RDWR);
+    if (fd < 0)
+    {
+        LOG_ERROR("Failed to open " + dev);
+        return false;
+    }
+
+    struct v4l2_format fmt;
+    memset(&fmt, 0, sizeof(fmt));
+    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+    fmt.fmt.pix_mp.width = width;
+    fmt.fmt.pix_mp.height = height;
+    fmt.fmt.pix_mp.pixelformat = V4L2_PIX_FMT_NV12;
+    fmt.fmt.pix_mp.num_planes = 1;
+
+    if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0)
+    {
+        LOG_ERROR("VIDIOC_S_FMT failed for " + dev);
+        close(fd);
+        return false;
+    }
+
+    close(fd);
+    return true;
+}
+
 void RTSPManager::init()
 {
     gst_init(nullptr, nullptr);
@@ -27,6 +58,11 @@ void RTSPManager::init()
 
 GstRTSPMediaFactory *RTSPManager::create_media_factory(const Camera &cam)
 {
+    if (!set_v4l2_format(cam.device, cam.width, cam.height))
+    {
+        LOG_ERROR("[RTSP] Failed to set V4L2 format for " + cam.name);
+    }
+
     int out_width = cam.width;
     int out_height = cam.height;