Why do my videos freeze when I try to sync video and data?

[Gatsby]

When using DIAdem 2010 to view synchorized video and data, it always works well on the first playback.  But then on subsquent playbacks the video will freeze while the data keeps playing.  I'm using MP4 videos.  I'm thinking it's not related to the PC - we just upgraded to a machine with a Quad i7 processer and 16GB RAM.  

Has anyone else experienced this issue?  Is there are a particluar codec the video should be saved with?

[netsirk]

Hi Gatsby,

Please refer to the following Help documentation on Codecs: http://zone.ni.com/reference/en-XX/help/370859H-01/genview/genview/view_video_format/

Regards,