Unable to play converted mp4 file in my mobile handset

[arundip_ghosh]

I have SIMOCO SM611 mobile handset which is support mp4 file format. In my mobile I have some inbuild mp4 clipings which I can play but I am unable to play converted mp4 file. When I am trying to play the converted file an error message showing "Invalid video file". Why? Please help me...............

Please give us more information.

How do you convert?
What tool?¨
What video settings, frame size, video bitrate?
Or are you downloading mp4 files?

[arundip_ghosh]

I am converting DAT to MP4 by using WinAvi MP4/3GP/WMV converter v3.1 .

[mats.hogberg]

"MP4" is a wide concept. Most phones support a rather narrow subset of that. I suggest Super, and one of the phone profiles.
WinAVI has a bad reputation, and I wouldn't trust it with anything.
Also, a DAT is a piece of VCD - Use VCDGaer to extract it to mpg instead.

/Mats

[balg]

which encoding of MP4 did you use (codec)? if im not mistaken your phone supports H.263

i also agree with the suggestion to use super instead of winavi