Video shifts on auto quality hls change

[kisso]

hello guys especially @erankor, sometimes when video quality changes automatically, it shifts few seconds bacward video, what can cause this problem? can you help me please?

[erankor]

I would guess that the keyframes are not aligned between the different renditions. If that is the case, the player may switch from segment N on one rendition to segment N+1 on another rendition, and get a slightly different timestamp.
For best experience, you should have forced key frames at fixed intervals that are aligned with the configured segment duration, across all renditions.