Audio and video in h5 video are not Synchronize

looks like they all fit the format required by video, but they don"t have Synchronize. Do you know why?

Nov.04,2021

is it convenient to post the video for analysis? For example, an online playback address or a network disk is fine.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1ea9475-5cd5e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea9475-5cd5e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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