一个RTP流服务器, 可从获取输入流(H264文件, 域套接字)并封装为RTP包发送
make
make test
测试程序的使用方法可查看相应程序的源码
make all 编译主程序和所有测试程序
make CROSS_COMPILE={your-cross-compile-toolchain-prefix} 指定交叉编译工具链前缀
play.sdp:
m=video 9000/2 RTP/AVP 96
a=rtpmap:96 H264/90000
使用VLC打开play.sdp文件播放
在JRTPLIB的源码目录下新建文件toolchain.cmake:
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_C_COMPILER $(your-cross-compiler-for-C))
set(CMAKE_CXX_COMPILER $(your-cross-compiler-for-C++))
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
CMakeLists.txt中添加:
set(CMAKE_INSTALL_PREFIX $(path-to-your-cross-compile-toolchain-root)
set(CMAKE_FIND_ROOT_PATH $(path-to-your-cross-compile-toolchain-root))
添加后的CMakeLists.txt如下:
...
project(jrtplib)
set(VERSION_MAJOR 3)
set(VERSION_MINOR 11)
set(VERSION_DEBUG 1)
set(VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_DEBUG}")
// 添加下面两行
set(CMAKE_INSTALL_PREFIX $(path-to-your-cross-compile-toolchain-root)
set(CMAKE_FIND_ROOT_PATH $(path-to-your-cross-compile-toolchain-root))
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
if (CMAKE_INSTALL_PREFIX AND NOT CMAKE_PREFIX_PATH)
#message("Setting CMAKE_PREFIX_PATH to ${CMAKE_INSTALL_PREFIX}")
file(TO_CMAKE_PATH "${CMAKE_INSTALL_PREFIX}" CMAKE_PREFIX_PATH)
endif()
...
JRTPLIB交叉编译默认目标平台是大端序，可改为小端序: -DJRTPLIB_USE_BIGENDIAN=OFF
执行cmake . -DCMAKE_TOOLCHAIN_FILE=toolchain.cmake -DJRTPLIB_USE_BIGENDIAN=OFF
然后make && sudo make install
假设采样率为90000Hz, 帧率为24FPS, 则timestamp为90000/24=3750
使用Unix Domain Socket时，不需要考虑网络延迟、丢包等问题，可以发送较大的包，这时候Linux设置的Buffer Size可能会导致发送包失败(EMSGSIZE)，可以调整Linux网络参数使较大的包能够成功发送:
查看默认和最大的发送数据包大小:
$ cat /proc/sys/net/core/wmem_default
$ cat /proc/sys/net/core/wmem_max查看默认和最大的接收数据包大小
$ cat /proc/sys/net/core/rmem_default
$ cat /proc/sys/net/core/rmem_max可在/etc/sysctl.conf中修改以上参数:
net.core.wmem_default=1048576
net.core.wmem_max=1048576
net.core.rmem_default=1048576
net.core.rmem_max=1048576
使修改生效:
$ sysctl -p
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