FAQs: Latency Testing for HDMI Codecs | Exvist Support

FAQs: Latency Test of Codec

How can we get lower latency via VLC when playing video on your iPad?

How can we conduct a latency test between the encoder and decoder?


How can we conduct a latency test of HDMI codec by playing RTSP stream?

Determining the cause of delay in RTSP streaming is often influenced by the RTSP player being used. To accurately test the performance, we recommend using specialized tools designed for RTSP streaming, as common media players can introduce buffering issues. Specifically, tool like EasyPlayerPro is optimized for real-time streaming and can provide more precise results for identifying and addressing delays in RTSP streaming. Just click the above EasyPlayerPro to download it for testing.

What specific steps should be followed to conduct a comparative latency test between VLC and EasyPlayerPro?

  1. Set up two computers: the 1st computer will serve as the video input source, and the 2nd computer will function as the video output device.
  2. Download and run OnlyStopWatch on the 1st computer to measure latency.
  3. On the 2nd computer, open EasyPlayerPro and pull the RTSP stream as below:

  1. Open VLC on the 2nd computer and pull the same RTSP stream as below:

  1. Use a high-speed camera on a mobile phone to capture images of the desktops of both computers. Use these images to calculate the specific latency times.
  1. Analysis: Compare the latency results. If the latency is around 100ms when using EasyPlayerPro, and significantly higher when using VLC, it indicates that the player itself influences the latency rather than the encoder/decoder used.
Notes
NOTE: Theoretical latency for both encoding and decoding is 33.3ms, based on the chip parameters.

Learn more about RTSP of Codec

  1. RTSP of Codec

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