Using this script, you can then encode and decode the stream on your desktop at the same time. I wrote a quick script in python that would output the current time in milliseconds to measure the system’s and the encoder latency encountered: #!/usr/bin/python3

However, some encoders, particularly the NVENC-based h264_nvenc and hevc_nvenc are very good at handling low-latency encoding situations (as they have dedicated encoder presets tuned to low latency encoding), and they are the perfect solution to this problem. This makes sense, because most movies are encoded once and decoded often, so it is a good trade-off to use more time for the encoding than the decoding. Streaming low-latency live content is quite hard, because most software-based video codecs are designed to achieve the best compression and not best latency. In this post I will explore how to stream a video and audio capture from one computer to another using ffmpeg and netcat, with a latency below 100ms, which is good enough for presentations and general purpose remote display tasks on a local network.

Ffmpeg rtsp stream latency