Usually, car navigation systems support MP4 format, so converting to MP4 format is the first choice.

But videos in MP4 format can be encoded in a variety of ways: DIVX, XVID, H264, etc. The car navigation system cannot support all video encoding methods. From a practical perspective, car navigation systems have relatively good support for DIVX and H264, but poor support for XVID.

In addition, if the video resolution is higher than the highest resolution supported by the navigator, it will also not be played.

So when converting to MP4 format, first select DVIX or H264 encoding method, and select 640*480 as the video resolution.