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Zach_Android/UsbToUdpTcpClient

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BSD 3-Clause License Copyright (c) 2021, Zach_Android All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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此用例用于QGroundControl开源地面站或对H264视频流解析处理,通过USB将读到的H264视频流解析成解码器需要显示的完整帧,再封装成标准的RTP打包格式,采用本地127.0.0.1回环地址,通过TCP/UDP通信,将数据流发送到QGroundControl进行视频解码显示,测试已经兼容Android 7.0以上版本。但发现6.0以下版本存在花屏和延时,尝试解决办法:用TCP传输时,和QT工程师商量不用QGroundControl的解码方式,采用FFMPEG和NDK层的Mediacodec硬解码,但是此方案还是存在花屏和延时,怀疑有两点问题导致:1、此需求本身存在合理性问题,传输流程为:USB接收视频数据>分析H264视频流>通过TCP/UDP跨进程视频流传输到QGroun... 展开 收起
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