for some reason, the all of the mp4 movies i downloaded last week aren't working. i get the message (TCPMP) "unknown file extension", even though any other mp4 movies are playing just fine. i also tried coreplayer, with the same results. anyone else have this problem and know what the issue could be, please post. thanx

[jabadabadu]

I hade similar problem like that, try to find registry taht player have made and delete them

[Robert235]

It must codec in the mp4 you downloaded,not all codec in file are compatible with phones when i download movies i encode to mp4 that work on coreplayer.In google type in media info for info about your video, if you want a fast video encoder for mp4 type encoder it freeware, but the ony problem is it leave a watermark on your video.

Did anyone get this problem solved? I am having this problem now when I am watching a part 2 of any rar file. It does not even work on VLC either.

[ultrarebel]

Try re-encoding it to XviD or DivX

The strange thing is that the part one of the rar files work. But the part two does not. But I will try to re-encode it to see if that will solve the problem.

[ultrarebel]

That is strange. If that doesn't work out, can you link to the topic/file see if I have the same problem.

with winamp it didnt work for me eather, but with win media player it worked..imao.

Winrar solved the problem for me.