Hello I am having problems getting videos to play on my HTC Desire. I have converted my .avi files into Mpeg4 so as the device could read them ok. I'm using the free programme 'Handbrake' to convert the files. And it does so with no problems. The new mpeg4 files play with sound and image. The problem occurs when I transfer the images onto the phones SD card. The video files are picked up via the camera folder (where you can play videos as there is no actual video player) as well as on the video player app I downloaded today - 'mVideoPlayer', without any problems but when I click to play the video the screen is black and only the sound works (even though on my pc the file played fine). Do I need to download a codec or something? I would have thought that as the Desire was compatible with mpeg4 files that it would play them straight off without having to add software. Has anyone else had the same issue? Cheers!