Existing users, 
iPhone error: “This movie format is not supported”
Posted 26 August 2008 @ 7am in Troubleshooting
A number of users have reported an issue in which movies previously playable movies are suddenly unplayable after an iPhone sofware update.
One user writes:
“I had the same issue with some of my Videos that were converted using Visual Hub. Once I upgraded my iPod Touch to 2.0 they stopped working. I eas confused at first as all of the the ones that still worked were in 4:3 aspect ratio. Anyway after trying many different solutions and settings. I found that if I used ffmpegX instead of Visual Hub to encode I had no problems with any of the resulting my videos-both 16:9 and 4:3 aspect ratio and different frame sizes.”
Per the above user’s commentary, re-encoding movies may be the most viable fix for this issue. Try using an alternative video encoder or a lower resolution/bitrate.
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4 Comments
Posted by Shibumi1956
30 August 2008 @ 7am
I had the same issue but discovered accidentally that removing a few applications allowed the movies to play.
Posted by mook2420
31 August 2008 @ 12am
my previously encoded mp4 files would not play but after chaning the extension to mov they work! No re-encode necessary! Well, at least check first.
Posted by jeffmatt
2 September 2008 @ 7am
I think you just need to convert your video to mp4 video, then you can add to iPhone, I found a guide about how to do that, share it here
http://www.top5soft.com/tutorial/how-to-convert-video-dvd-movie-to-iphone-windows.html
Posted by sundaymicky
27 October 2008 @ 11pm
You should make sure the video is MP4 or H2.64 video for iPod.
You can try DVD to iPhone Converter Suite to rip DVD movie and convert videos in any format to iPhone. It is the fastest converter I have used. Also, the output quality is great.