我在C ++中有以下代码：
#include <iostream> #include <windows.h> #include <iostream> // std::cout #include <fstream> // std::ifstream #include <vector> #include <stdlib.h> using namespace std; int main(int argc, const char **argv) { wcout << "Creating an instance of a named pipe..." << endl; // Create a pipe to send data HANDLE pipe = CreateNamedPipe( L"\\\\.\\pipe\\my_pipe", // name of the pipe PIPE_ACCESS_OUTBOUND, // 1-way pipe -- send only PIPE_TYPE_BYTE, // send data as a byte stream 1, // only allow 1 instance of this pipe 0, // no outbound buffer 0, // no inbound buffer 0, // use default wait time NULL // use default security attributes ); if (pipe == NULL || pipe == INVALID_HANDLE_VALUE) { wcout << "Failed to create outbound pipe instance."; // look up error code here using GetLastError() system("pause"); return 1; } wcout << "Waiting for a client to connect to the pipe..." << endl; // This call blocks until a client process connects to the pipe BOOL result = ConnectNamedPipe(pipe, NULL); if (!result) { wcout << "Failed to make connection on named pipe." << endl; // look up error code here using GetLastError() CloseHandle(pipe); // close the pipe system("pause"); return 1; } wcout << "Sending data to pipe..." << endl; //opening file ifstream infile; infile.open("E:/xmen.jpg",std::ios::binary); ofstream out("E:/lelel.jpg",std::ios::binary); infile.seekg(0,std::ios::end); size_t file_size_in_byte = infile.tellg(); vector<char> file_vec; file_vec.resize(file_size_in_byte); infile.seekg(0,std::ios::beg); infile.read(&file_vec[0],file_size_in_byte); out.write(&file_vec[0],file_vec.size()); wcout<<file_size_in_byte<<endl; // This call blocks until a client process reads all the data DWORD numBytesWritten = 0; result = WriteFile( pipe, // handle to our outbound pipe &file_vec[0], // data to send 61026, // length of data to send (bytes) &numBytesWritten, // will store actual amount of data sent NULL // not using overlapped IO ); if (result) { wcout << "Number of bytes sent: " << numBytesWritten << endl; } else { wcout << "Failed to send data." << endl; // look up error code here using GetLastError() } // Close the pipe (automatically disconnects client too) CloseHandle(pipe); wcout << "Done." << endl; system("pause"); return 0; } 我使用以下命令创build一个命名pipe道\\。\ pipe \ my_pipe，FFMPEG连接到该pipe道：
64-static\bin\Video>ffmpeg.exe -loop 1 -s 4cif -f image2 -y -i \\.\pipe\\my_pipe
-r 25 -vframes 250 -vcodec rawvideo -an eaeew.mov
输出：
ffmpeg version N-54233-g86190af Copyright (c) 2000-2013 the FFmpeg developers built on Jun 27 2013 16:49:12 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib libavutil 52. 37.101 / 52. 37.101 libavcodec 55. 17.100 / 55. 17.100 libavformat 55. 10.100 / 55. 10.100 libavdevice 55. 2.100 / 55. 2.100 libavfilter 3. 77.101 / 3. 77.101 libswscale 2. 3.100 / 2. 3.100 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 3.100 / 52. 3.100 [image2 @ 0000000003ee04a0] Could find no file with with path '\\.\pipe\\my_pipe ' and index in the range 0-4 \\.\pipe\\my_pipe: No such file or directory
我可以在我的控制台上看到我的C ++应用程序收到了连接，但在FFMPEG中出现了上述错误。 有人可以请指教？
编辑1使用下面的命令
ffmpeg.exe -s 4cif -i \\.\pipe\my_pipe -r 25 -vframes 250 -vcodec rawvideo -an tess.mov
我得到以下输出
ffmpeg version N-54233-g86190af Copyright (c) 2000-2013 the FFmpeg developers built on Jun 27 2013 16:49:12 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib libavutil 52. 37.101 / 52. 37.101 libavcodec 55. 17.100 / 55. 17.100 libavformat 55. 10.100 / 55. 10.100 libavdevice 55. 2.100 / 55. 2.100 libavfilter 3. 77.101 / 3. 77.101 libswscale 2. 3.100 / 2. 3.100 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 3.100 / 52. 3.100 \\.\pipe\my_pipe: Invalid data found when processing input
所以，现在看来它能够连接到pipe道，但无法处理input。
我正在做同样的事情，但与正常的管道，不命名一。 我的代码工作很好。 希望能帮助到你
#include <stdio.h> #include <iostream> #include <iomanip> using namespace std; int main(int argc, char **argv) { FILE *pPipe; long lSize; char * imgdata; int imgcols = 640, imgrows = 480, elemSize = 3; imgdata = ...; stringstream sstm; sstm << "/usr/local/bin/ffmpeg -y -f rawvideo -vcodec rawvideo -s " << imgcols << "x" << imgrows <<" -pix_fmt rgb24 -i - -c:v libx264 -shortest my_output.mp4"; if ( !(pPipe = popen(sstm.str().c_str(), "w")) ) { cout << "popen error" << endl; exit(1); } // open a pipe to FFmpeg lSize = imgrows * imgcols * elemSize; // write to pipe fwrite(prova.data, 1, lSize, pPipe); fflush(pPipe); fclose(pPipe); return 0; }