+ /*
+ ffmpeg accepts the input filename on the command-line
+ if(_dup2(_fileno(input), _fileno(stdin)) != 0) {
+ synfig::error(_("Unable to open pipe to ffmpeg"));
+ return false;
+ }
+ */
+
+ pid = _spawnlp(_P_NOWAIT, "ffmpeg", "ffmpeg", "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
+ if( pid < 0) {
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ }
+
+ // Restore stdin/stdout
+ if(_dup2(stdin_fileno, _fileno(stdin)) != 0) {
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ }
+ if(_dup2(stdout_fileno, _fileno(stdout)) != 0) {
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ }
+ close(stdin_fileno);
+ close(stdout_fileno);
+
+ // Close the pipe write end - ffmpeg uses it
+ close(p[1]);
+
+ // We read data from the read end of the pipe
+ file = fdopen(p[0], "rb");
+
+#elif defined(UNIX_PIPE_TO_PROCESSES)
+
+ int p[2];
+
+ if (pipe(p)) {
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ };
+
+ pid = fork();
+
+ if (pid == -1) {
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ }
+
+ if (pid == 0){
+ // Child process
+ // Close pipein, not needed
+ close(p[0]);
+ // Dup pipein to stdout
+ if( dup2( p[1], STDOUT_FILENO ) == -1 ){
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ }
+ // Close the unneeded pipein
+ close(p[1]);
+ execlp("ffmpeg", "ffmpeg", "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
+ // We should never reach here unless the exec failed
+ cerr<<"Unable to open pipe to ffmpeg"<<endl;
+ return false;
+ } else {
+ // Parent process
+ // Close pipeout, not needed
+ close(p[1]);
+ // Save pipein to file handle, will read from it later
+ file = fdopen(p[0], "rb");
+ }
+
+#else
+ #error There are no known APIs for creating child processes
+#endif