My psp videos from psp video 9 is not working.?

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try doing a version update to something that is easy to convert to custom firmware and also - try using the tool (psp video 9) itself to transfer the video file to the psp

PSP video can support MP4、MP4-AVC（H.264）、H-AVC(480P，H.264) format. The picture formats are JPEG、GIFor BMP. What you need is to use a convert to transfer to the PSP format. You can try :4Easysoft PSP Video Converter http://www.4easysoft.com/psp-video-converter.html It can: 1.Convert almost all videos to PSP, PS3 video MP4 2.Convert video/audio to MP3, WMA, AAC audio 3.All-around video editing functions Hope this can help you.