live555实现视频格式数据流化处理

MPEG2TransportStreamIndexer

MPEG2TransportStreamIndexer主要实现了对视频数据流化，要想实现对视频的点播，要同时具备.ts和.tsx文件，MPEG2TransportStreamIndexer示例代码可以完成这个过程。

其中用到的类的继承关系如下：

将ts流化需要四个主要的步骤，分别为：

打开要流化的视频文件

根据打开的文件创建index

打开流化之后文件的输出

开始每取一帧视频数据转换为流之后输出到输出文件中，重复直到文件结束

具体实现如下：

// // Created by andrew on 2021/6/17. // #include <iostream> #include <liveMedia.hh> #include <BasicUsageEnvironment.hh> #include <cstring>void afterPlaying(void* /*clientData*/) {std::cout << "done" << std::endl;exit(0); }class MPEG2TransportStreamIndex { public:MPEG2TransportStreamIndex() = default;~MPEG2TransportStreamIndex() = default;int32_t Init(const char* pProgramName, const char* pSzInputFilename, size_t filenameLen) {// 设置用户环境变量if (filenameLen < 4 || strcmp(&pSzInputFilename[filenameLen - 3], ".ts") != 0) {*m_pEnv << "ERROR : input file name " << pSzInputFilename;return -1;}TaskScheduler* pScheduler = BasicTaskScheduler::createNew();m_pEnv = BasicUsageEnvironment::createNew(*pScheduler);m_pProgramName = pProgramName;m_pInputFilename = pSzInputFilename;m_fileNameLen = filenameLen;return 0;}int32_t OpenInputFile() {m_pInput = ByteStreamFileSource::createNew(*m_pEnv, m_pInputFilename, TRANSPORT_PACKET_SIZE);if (nullptr == m_pInput) {*m_pEnv << "open input file failed .";return -1;}return 0;}int32_t CreatTransportStreamFilter() {m_pIndexer = MPEG2IFrameIndexFromTransportStream::createNew(*m_pEnv, m_pInput);if (nullptr == m_pIndexer) {return -1;}return 0;}int32_t OpenOutputFile() {char *pSzOutputFilename = new char[m_fileNameLen + 2];sprintf(pSzOutputFilename, "%sx", m_pInputFilename);m_pOutput = FileSink::createNew(*m_pEnv, pSzOutputFilename);if (nullptr == m_pOutput) {return -1;}return 0;}void StartPlaying() {*m_pEnv << "Start Writing index file " ;// 将fSource传递给 outputm_pOutput->startPlaying(*m_pIndexer, afterPlaying, nullptr);m_pEnv->taskScheduler().doEventLoop();}private:UsageEnvironment *m_pEnv{};const char *m_pProgramName{};// 输入文件名和文件长度const char *m_pInputFilename{};int m_fileNameLen{};FramedSource* m_pInput{};FramedSource * m_pIndexer{};MediaSink* m_pOutput{}; };int main(int argc, char* argv[]) {if (argc != 2) {std::cout << "argc < 2" << std::endl;return -1;}// 定义一个Mpeg解析类MPEG2TransportStreamIndex mpeg2TransportStreamIndex;int32_t ret = mpeg2TransportStreamIndex.Init(argv[0], argv[1], strlen(argv[1]));if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.Init failed." << std::endl;return ret;}// 打开输入文件ret = mpeg2TransportStreamIndex.OpenInputFile();if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.OpenInputFile failed." << std::endl;return ret;}// 创建文件流ret = mpeg2TransportStreamIndex.CreatTransportStreamFilter();if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.CreatTransportStreamFilter failed." << std::endl;return ret;}// 打开输出文件ret = mpeg2TransportStreamIndex.OpenOutputFile();if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.OpenOutputFile failed." << std::endl;return ret;}// 开始执行事件循环mpeg2TransportStreamIndex.StartPlaying();return 0; }

参考：

MPEG2TransportStreamIndexer

总结

以上是生活随笔为你收集整理的live555实现视频格式数据流化处理的全部内容，希望文章能够帮你解决所遇到的问题。

如果觉得生活随笔网站内容还不错，欢迎将生活随笔推荐给好友。