ffprobe/ffplay/ffmpeg command for checking audio/video sync I'm working on a script that live streams 3 hours of video to several servers. Is there a command (or tool... maybe using something else like wireshark?) that I could run on each of the streams to automate a check for glaring audio/video sync issues?

If so, at least please point me to the relevant reading materials/documentation. Thanks in advance!
This tool is impossible. Almost.

To check sync of audio/video, you need something what appeared in both streams, what can be used as sync points. In old days used Clapperboard during film shooting. In television there was hidden timecode at border of frame, in zone of overscan which not displayed on TV

If you writing professional software, include timecodes to both streams. If not, just stream your video and audio in a single container, it enough.