[BobbyQ]

it makes no sense to adjust the sample rate the way you consider it above, a value of 37158 isn't even supported. Standard sample rates are 44100 and 48000.
First of all, use "delay", set to "0" and convert. The result should play absolutely sync on your PC (if not, your source video is not sync !)
Then play it on your rockchip and check two things : speed (pitch) and delay. If speed is wrong, then the player does not support the chosen sample rate (Qx comes with 44100). You can try and adjust the sample rate with "switch" and "-srate 48000" or any other (supported) value.
The delay can be adjusted with "delay" and then enter the amount of delay in ms.