Android developer wanted for adding MP3 audio file to MP4 video file

If you can get FFMPEG or JavaCV working on Android, or you are proficient in the MediaCodec/MediaMuxer classes, you are perfect for the job. Here's what we need: 1. (optional) Convert an array of Bitmaps, each with its own unique duration, into a single MP4 video (I’ve done this already with JCodec, but there may be better ways). 2. Mux an MP3 file with the MP4 video, and have control over its start point and its duration, and make it play again from its beginning if it is not long enough for the generated MP4 video. 3. Be able to trim an M4A file generated by audio recording on the device and mux it with either the aforementioned MP3 file, or the MP4 video, whichever is easier. The final output should be an MP4 video with 800 x 800 resolution, that is composed of a series of images, an MP3 instrumental, and an M4A audio recording. The video should ideally be playable on most/all android devices. Deliverables expected are: Working code merged Full QA conducted with validated scripts Availability for a few weeks to answer questions (We just want someone nice that won't get upset if we email with some basic questions) Please do NOT reply with a placeholder bid. We are soliciting ONLY final bids as we want to get started developing ASAP.