/root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In destructor ‘virtual usb_cam::AbstractV4LUSBCam::~AbstractV4LUSBCam()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:239:5: error: ‘av_packet_free’ was not declared in this scope av_packet_free(&avpkt); ^~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:239:5: note: suggested alternative: ‘av_packet_ref’ av_packet_free(&avpkt); ^~~~~~~~~~~~~~ av_packet_ref /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::init_decoder()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:379:13: error: ‘av_packet_alloc’ was not declared in this scope avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:379:13: note: suggested alternative: ‘av_image_alloc’ avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ av_image_alloc /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::decode_ffmpeg(const void*, int, usb_cam::camera_image_t*)’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:779:8: error: ‘avcodec_send_packet’ was not declared in this scope if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:779:8: note: suggested alternative: ‘av_append_packet’ if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ av_append_packet /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:792:9: error: ‘avcodec_receive_frame’ was not declared in this scope if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:792:9: note: suggested alternative: ‘avcodec_free_frame’ if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ avcodec_free_frame usb_cam/CMakeFiles/v4l_driver.dir/build.make:110: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o' failed make[2]: *** [usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o] Error 1 CMakeFiles/Makefile2:656: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/all' failed make[1]: *** [usb_cam/CMakeFiles/v4l_driver.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j4 -l4" failed
时间: 2023-08-28 17:58:16 浏览: 47
根据错误信息显示,`av_packet_free`、`av_packet_alloc`、`avcodec_send_packet` 和 `avcodec_receive_frame` 这些函数没有在作用域内找到。这可能是由于编译器无法找到正确的 FFmpeg 库路径导致的。
请确保您已正确安装了 FFmpeg 库,并且在编译时将正确的头文件和库路径添加到您的项目中。您可以使用以下方法之一来解决这个问题:
1. 在 CMakeLists.txt 文件中添加 FFmpeg 相关的库和头文件路径:
```cmake
include_directories(/path/to/ffmpeg/include)
link_directories(/path/to/ffmpeg/lib)
```
请将 `/path/to/ffmpeg` 替换为您实际的 FFmpeg 安装路径。
2. 在 CMakeLists.txt 文件中添加链接 FFmpeg 库的指令:
```cmake
target_link_libraries(your_target_name avcodec avutil)
```
请将 `your_target_name` 替换为您实际的目标名称。
完成这些步骤后,重新编译您的项目,应该就能解决这些错误了。
如果您还有其他问题,请随时提问。
相关问题
/root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In destructor ‘virtual usb_cam::AbstractV4LUSBCam::~AbstractV4LUSBCam()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:231:5: error: ‘av_packet_free’ was not declared in this scope av_packet_free(&avpkt); ^~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:231:5: note: suggested alternative: ‘av_packet_ref’ av_packet_free(&avpkt); ^~~~~~~~~~~~~~ av_packet_ref /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::init_decoder()’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:371:13: error: ‘av_packet_alloc’ was not declared in this scope avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:371:13: note: suggested alternative: ‘av_image_alloc’ avpkt = av_packet_alloc(); ^~~~~~~~~~~~~~~ av_image_alloc /root/catkin_uc/src/usb_cam/src/camera_driver.cpp: In static member function ‘static bool usb_cam::AbstractV4LUSBCam::decode_ffmpeg(const void*, int, usb_cam::camera_image_t*)’: /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:771:8: error: ‘avcodec_send_packet’ was not declared in this scope if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:771:8: note: suggested alternative: ‘avcodec_get_name’ if(avcodec_send_packet(avcodec_context, avpkt) < 0) ^~~~~~~~~~~~~~~~~~~ avcodec_get_name /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:784:9: error: ‘avcodec_receive_frame’ was not declared in this scope if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ /root/catkin_uc/src/usb_cam/src/camera_driver.cpp:784:9: note: suggested alternative: ‘avcodec_free_frame’ if (avcodec_receive_frame(avcodec_context, avframe_camera) < 0) ^~~~~~~~~~~~~~~~~~~~~ avcodec_free_frame usb_cam/CMakeFiles/v4l_driver.dir/build.make:110: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o' failed make[2]: *** [usb_cam/CMakeFiles/v4l_driver.dir/src/camera_driver.cpp.o] Error 1 CMakeFiles/Makefile2:656: recipe for target 'usb_cam/CMakeFiles/v4l_driver.dir/all' failed make[1]: *** [usb_cam/CMakeFiles/v4l_driver.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2
根据您提供的错误信息,错误是由于在camera_driver.cpp文件中未找到av_packet_free、av_packet_alloc、avcodec_send_packet和avcodec_receive_frame等函数导致的。
这些函数属于FFmpeg库,您需要确保已正确链接并包含FFmpeg库。您可以按照以下步骤检查和解决此问题:
1. 确保您已经正确地安装了FFmpeg库。请参考FFmpeg的官方文档或安装说明,确保您已经正确地安装了FFmpeg库。
2. 在CMakeLists.txt文件中,确保已经添加了链接FFmpeg库的指令。可以使用`target_link_libraries()`函数将FFmpeg库链接到您的项目中。在您的CMakeLists.txt文件中,找到与您的目标(例如v4l_driver)相关的`add_library()`或`add_executable()`函数,并在其下方添加以下代码:
```cmake
target_link_libraries(your_target_name avcodec avformat swscale)
```
请将`your_target_name`替换为实际的目标名称。
3. 确保在camera_driver.cpp文件中包含了必要的头文件。在camera_driver.cpp文件的开头,添加以下代码:
```cpp
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
```
请根据您的实际情况调整头文件路径。
4. 重新编译您的项目,确保现在能够正确链接和使用FFmpeg库。
如果您仍然遇到问题,请提供更多关于您的CMakeLists.txt文件和相关代码的信息,以便我们能够更好地帮助您解决问题。
/bin/sh: 1: ../../catkin_generated/env_cached.sh: Permission denied
这个错误通常表示你在运行脚本时没有执行权限。你可以尝试使用`chmod +x`命令给脚本添加执行权限,例如:
```
chmod +x ../../catkin_generated/env_cached.sh
```
然后再次运行脚本看看是否能够执行成功。如果问题仍然存在,可能是由于其他权限或路径问题导致的,请提供更多的上下文信息,以便我能够更好地帮助你。