Currently, opencv does not support using the ffmpeg backend to open the camera device. Is there any support plan at present? My current problem is that I want to use ffmpeg's hardware acceleration to decode the camera data.Activity asmorkalov commented on Jan 21, 2025 asmorkalov on Jan ...
针对你遇到的 warning: error opening file (/build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp) 错误,以下是一些可能的解决方案,这些方案基于你提供的提示和搜索到的信息: 检查文件路径是否正确: 确保你提供给 cv2.VideoCapture() 的文件路径是正确的。如果路径中包含特殊字符或空格,确保它们被正确处理(例如...
warning: Error opening file (../../modules/highgui/src/cap_ffmpeg_impl.hpp:529) capture device failed to open! 解决:更改输入video文件的路径,确定正确后即运行成功。
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本文分析ffmpeg的vfwcap的实现,同时也帮助了解ffmpeg的架构和inputdevice的写法. 要实现一个input device,首先要实作一个结构: AVInputFormat ff_vfwcap_demuxer = { .name = "vfwcap", .long_name = NULL_IF_CONFIG_SMALL("VfW video capture"),
参考https://code.ros.org/trac/opencv/ticket/1020 中 ffmpeg_build.patch 和 ffmpeg_build_2.patch 对 cap_ffmpeg_impl.hpp文件中的出错变量进行替换, 附件是改好的cap_ffmpeg_impl.hpp,可直接替换同名原文件。 重新执行cmake 、 make步骤,此时成功编译不再出错。然后执行sudo make install命令安装。安装过程...
OpenCV故障cap_ffmpeg_impl.hpp--001 OpenCV报错: warning: Error opening file (../../modules/highgui/src/cap_ffmpeg_impl.hpp:529) capture device failed to open! 解决:更改输入video文件的路径,确定正确后即运行成功。
capabilities = AV_CODEC_CAP_DR1 | 822 825 AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS, 823 826 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | 827 + FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | 824 828 FF_CODEC_CAP_USES_PROGRESSFRAMES, ...
Example and confirmed effect: http://answers.opencv.org/question/162781/videocaptureset-cap_prop_pos_frames-framenumber-not-exact-in-opencv-32-with-ffmpeg/
OBS - Free and open source software for live streaming and screen recording - obs-ffmpeg: Cap NVENC Max B-frames according to GPU caps · stream-labs/obs-studio@77fbfbe