You'll have to wait a bit until the pts delay is auto adjusted. Generally it takes 2-4 seconds, because access set a very high default pts delay value. One amelioration would be to lower the pts_delay when this option is set to allow a quicker convergence.
The general algorithm requires some tuning, but results are here.
Note, this only works if there is a video track. A similar function could be developped for the audio tracks.