Automated ordering of jpg's, flv's & mp3's to create video

We have a website which takes a customers photos, videos, music and words, and we use these items to create a unique video for them or as a greeting. The website is currently ajax and jquery, and uses ffmpeg. Please see [login to view URL] for more info. At the moment we create these videos manually, we would like someone to create a piece of software which can automatically mix and place words, videos and music over the top of songs. The order is chosen by the customer on a mixing board already in place, so the software will need to take these items, keep them in order, and create and show the customer their video within a timely manner. It should then also give them the opportunity to remix (different tempo/mix etc) and edit (change photos, videos, music and style). A general idea of what we are looking for can be seen at [login to view URL] if you create video and see how the automation of the video works. In short; we want the video to be automatically created while the customer waits. We would be able to give you about a month to complete this work, please specify if you feel this is achievable. Also we are unsure of the budget, and so will be looking into this further whilst we look for outsourcers. Please bid fairly and you will be more likely to be chosen. We run an internet marketing company; if you do well with this job, are honest with your timekeeping, work hard and to high standard we will have a constant flow of work for you in the future. Please give vague ideas about how you will complete this project, so that we know you understand it. We do not expect you to specify exact actions, but we must be clear you understand and are capable.