FFMPEG Job -> Join 2 Videos + 1 PNG File

We have 2 videos and 1 PNG file. First join 1st video and PNG file, then merge them with 2nd video file. ffmpeg already have join support but I don't know codecs well. I tried it but get some video/sound errors. An ffmpeg expert needed. Please see detailed description. Thanks. ## Deliverables **We have; - A video - PNG image - An another video We wil merge first video and PNG image in same timeline. We will display PNG image bottom of the first video. Then merge this with second video. After (1st video+PNG) played, second video will start to play without the PNG. - Output file will be mp4. - PNG file is fullscreen and will be displayed fullscreen for any size of video. - 1st video and 2nd video can have different codecs and types. I want clean and quality output. 1st video and PNG are hosted in server. 2nd video at remote server. So firstly, your script need to download 2nd video from the url has given. I want a bash script to make this operation. (I will use this bash script from PHP) Like this; ./mergevideos /home/xx/[login to view URL](flv,avi,mpg,etc.) /home/xx/[login to view URL] [login to view URL](flv,avi,mpg,etc.) I have an empty linux server ffmpeg and mencoder installed. You could work on it or prepare on your server and send me sources. I will test it with different type of videos. Please place your bid under $150.**