MPEG2TransportStreamIndexer

MPEG2TransportStreamIndexer主要實現了對視頻數據流化，要想實現對視頻的點播，要同時具備.ts和.tsx文件，MPEG2TransportStreamIndexer示例代碼可以完成這個過程。

其中用到的類的繼承關系如下：

將ts流化需要四個主要的步驟，分別為：

打開要流化的視頻文件

根據打開的文件創建index

打開流化之后文件的輸出

開始每取一幀視頻數據轉換為流之后輸出到輸出文件中，重復直到文件結束

具體實現如下：

// // 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) {// 設置用戶環境變量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 " ;// 將fSource傳遞給 outputm_pOutput->startPlaying(*m_pIndexer, afterPlaying, nullptr);m_pEnv->taskScheduler().doEventLoop();}private:UsageEnvironment *m_pEnv{};const char *m_pProgramName{};// 輸入文件名和文件長度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;}// 定義一個Mpeg解析類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;}// 打開輸入文件ret = mpeg2TransportStreamIndex.OpenInputFile();if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.OpenInputFile failed." << std::endl;return ret;}// 創建文件流ret = mpeg2TransportStreamIndex.CreatTransportStreamFilter();if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.CreatTransportStreamFilter failed." << std::endl;return ret;}// 打開輸出文件ret = mpeg2TransportStreamIndex.OpenOutputFile();if (0 != ret) {std::cerr << "mpeg2TransportStreamIndex.OpenOutputFile failed." << std::endl;return ret;}// 開始執行事件循環mpeg2TransportStreamIndex.StartPlaying();return 0; }

參考：

MPEG2TransportStreamIndexer

總結

以上是生活随笔為你收集整理的live555实现视频格式数据流化处理的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。