我正在尝试使用boost::process加载gstreamer插件来调用gst-launch
。
当我通过命令行加载插件时,一切都很好:
gst-launch-1.0 videotestsrc ! privacyprotector ! fakesink
如果我使用可执行文件的完整路径,它也能很好地工作:
bp::child c("/opt/intel/openvino/data_processing/gstreamer/bin/gst-launch-1.0 videotestsrc ! privacyprotector ! fakesink", ec);
但是,如果我试图在路径中找到可执行文件,并将参数作为单独的参数发送到bp::child
,那么gstreamer无法找到插件:
bp::child c(bp::search_path("gst-launch-1.0"), bp::args("videotestsrc ! privacyprotector ! fakesink"), ec);
我缺少的参数处理有什么特定的东西吗?
我认为参数需要是一个向量:
- https://www.boost.org/doc/libs/1_75_0/doc/html/boost_process/design.html#boost_process.design.arg_cmd_style
- https://www.boost.org/doc/libs/1_66_0/doc/html/boost/process/args.html
所以,试试
Wandbox直播
#include <boost/process.hpp>
#include <iostream>
namespace bp = boost::process;
int main() {
std::error_code ec;
bp::child c(
bp::search_path("gst-launch-1.0"),
bp::args = {"videotestsrc", "!", "privacyprotector", "!", "fakesink"},
ec);
c.wait();
std::cout << ec.message() << ": " << c.exit_code();
}
在我的系统上打印:
WARNING: erroneous pipeline: no element "privacyprotector"
Success: 1