[英]Listening to port in FFmpeg/Libav
在FFmpeg中,有一個參數“ -listen”以偵聽指定的端口:
# Server side (receiving):
ffmpeg -listen 1 -enter code herei http://server:port -c copy somefile.ogg
https://www.ffmpeg.org/ffmpeg-protocols.html#toc-http
我想在帶有Libav的C ++中使用此命令(因為FFMpeg已移至Libav)。
要監聽端口,我需要使用哪種Libav方法?
我通過以下方法解決了這個問題:
void listen(const unsigned int port) {
const int TIMEOUT = 600000;
// check if webservice is already listening
if (!m_listening) {
m_listening = true;
// Format specification: tcp://hostname:port[?options]
// See: https://www.ffmpeg.org/ffmpeg-protocols.html#tcp
std::stringstream ss;
ss << "tcp://localhost:" << port << "?listen=1" << "?listen_timeout=" << TIMEOUT << "?timeout=" << TIMEOUT * 1000;
const std::string publishingPointURI = ss.str();
avformat_network_init();
if (avformat_open_input(&m_stream, publishingPointURI.c_str(), NULL, NULL) != 0) {
throw Exception(
"Unable to buffer stream received from " + publishingPointURI + "");
}
m_listening = false;
}
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