elektito / ss-sync

How to Build

You will need gstreamer-1.0 and the gst-rtsp-server development files in order to build this program. In Ubuntu 16.04, you can install these by running:

$ sudo apt install libgstreamer1.0-dev libgstrtspserver-1.0-dev

In order to build, simply run make:

$ make

How to Run the Server

Pass an mkv file containing an H.265 video as the only argument to ss-sync:

$ ./ss-sync ~/sample_data/1_cam01.mkv

How to Watch the Video

You can use any video player supporting RTSP. For example, to use the command-line version of VLC run:

$ cvlc rtsp://localhost:8554/test

Checking the Timestamps

Use tcpdump or wireshark to capture the packets while being played:

$ sudo tcpdump -i lo -w foo.pcap

Then filter for RTP packets containing the header extensions in wireshark: rtp.ext eq 1. Under RTP headers, you will see the extension headers with the type 0xabac. The first header is the seconds portion of the timestamp, while the second header contains the nanoseconds.