the delay in displaying streams from cameras from different manufacturers

Hello!

Every day we are getting the delay in displaying streams from cameras from different manufacturers when the cameras are pointed at the same object. In the last case there are two cameras: EverFocus and Hikvision. EverFocus - with built-in microphone. When we disable sound, delay gets less, but still presents. The reason is probably different decoding times. In any case, this problem must be monitored and overcome - the issue was raised over a year ago, but no action was taken then. I can send a short video, if you give me an E-mail.

BR
V.