Transfer joomla 2.5 article into joomla 3.8 with a lot of rules and execption

Transfer articles from joomla 2.5 into joomla 3.8 but with lot of rules.... - Each article content start with small image... that must be filtered out... - When an article has big image(s) at the end of the content: - In joomla 3 image has to be stored in /images/blog/ <format [login to view URL]> stored in database as the image(intro) and image(full content) - If more then 1 image the other images are stored as <format [login to view URL]>, <format [login to view URL]> and so on - image(s) deleted from text itself - Gallery: sometimes end of content has a gallery link like {gallery}20150317_yep{/gallery}: then foto's should be recoverd from that folder and saved and proccesed as the other images - Video: sometimes end of content has video link like {jwplayer}http://xxx.nl/videos/video.mp4&image=[login to view URL]{/jwplayer} - Video and his poster has to be retreived and saved in joomla3.8 in images/video <format [login to view URL] and [login to view URL]) - At new article in joomla3.8 at imes tab it is setted in caption intro and full as mp4:images/video/[login to view URL] - Some older videos has a {denvideo [login to view URL]} link... then .flv has to be converted to mp4 and stored same as before - Audio: in content as {saudioplayer}[login to view URL]{/saudioplayer} recover and store in /images/audio - At new article in joomla3.8 at images tab it is setted in caption intro and full as mp4:images/audio/[login to view URL] Don't just do a bid. I like to here the steps you want to do to realize this…