I'm trying to encode .mp4 file using profile "generic.mp4.h264.aac" (h264 + aac) but when I play it on my nokia E5's built-in real player, I get "General System Error" message. According to the nokia specification guide it has a support for H.264 and AAC video and audio formats. But are there any different settings for .mp4 video that I should try? and how would it be different in terms of video and audio details.