如何在h264中流式传输视频？

Question

I'm trying to stream my video into h264 , so I can play it on a html5 page through video tag. I have found a lot of examples showing how to stream a video file to rtmp stream. but I can barely find a example for h264 .

Here is the only example I can find:

ffmpeg -f dshow -i video="Virtual-Camera" -preset ultrafast -vcodec libx264 -tune zerolatency -b 900k -f mpegts udp://10.1.0.102:1234

This seems fits to my need. But I don't know what kind of server udp://10.1.0.102:1234 is.

If it starts with rtmp://10.1.0.102 , then I know it's a rtmp server, and I have to setup a nginx and a rtmp module. But what's a udp server? What do I have to do to setup one?

Thanks a lot.

Answer 1

UDP:// is not a streaming format as such, but tells you it's serving the stream over UDP (instead of TCP). The format is actually MPEG-TS (which you can see from -f mpegts )

If you want to play it in a normal browser, you will need to provide it in a different format. for live video, there isn't really a universally supported format that you can just use with the tag. Microsoft Edge and Apple Safari both support HLS natively, but both Chrome and Firefox lack any native support for a live streaming format.

With HLS, you can use hls.js and get playback in pretty much all browsers. ffmpeg can natively output HLS , you would just need a web server as well then.

Answer 2

This ffmpeg command line allows streaming over MPEG2-TS over UDP. So it acts as a live encoder, and that's not a bad choice for live encoder.

So you have a live encoder in place, but to stream to a web page, you also need a streaming server software, that will ingest (receive) this live stream, and will convert it to a format playable by HTML5 video tag. The format is likely to be WebRTC.

You can use Wowza or Unreal Media Server - they will ingest your MPEG2-TS stream and output to webpage as WebRTC stream.