Summary:If you have used Media Portal and recorded many videos, you can follow this post to load them to Avid Media Composer for editing natively.
MediaPortal is an open-source media center (HTPC) software project, often considered an alternative to Windows Media Center. It provides a 10-foot user interface for performing typical PVR/TiVo functionality, including playing, pausing, and recording live TV; playing DVDs, videos, and music; viewing pictures; and other functions.
MediaPortal turns your computer into a very advanced media center, or Home Theater PC (HTPC).

Main feature:
Watch, schedule and record live TV - like a TiVo, but more, and for free!
Play videos, movies, DVDs and Blu-ray discs
Listen to music and radio
Enjoy pictures, home videos or create a slideshow
Stream media, radio and TV to any HTPC / PC connected to your network
Use a remote to control your HTPC from your couch
Check the weather, news, and more
Access MediaPortal from the web or mobile device
Media Portal recordings format:
From Media Portal official website, you will know that Media Portal can record videos from your TV, the recorded video formats are different due to your TV card, .ts video format is one of the most usual formats. If you want one folder for all tv cards you can select the folder you'd like and press Same recording folder for all cards. Note that the Recording Format is alway Transport Stream (*.ts). In earlier versions of MediaPortal it was also possible to save to mpeg files, but this feature has been removed due to a windows bug with the playback of mpeg files.
Lossless Transfer Media Portal recordings to Avid Media Composer
If you use Avid Media Composer to edit videos usually, you may have known that DNxHD codec MOV format is best for Avid MC editing, with this format you can edit footages natively. So if you want to lossless transfer Media Portal recordings to Avid Media Composer for editing, you'd better transcode Media Portal recordings to DNxHD codec MOV format.
Pavtube Media Magician for Mac is the best choice, I have used this tools for some time, and I also rewrap HD files to AMC natively on Mac, this software can deal nearly all kinds of videos, and convert HD clips natively for Avid Media Composer on Mac, that is to convert video to DNxHD codec MOV format, and then you can edit any video files natively in Avid MC. Besides, it also run as an excellent video editor, which can help you make video editing easily.
Once you install and run this software, drag and drop the Media Portal recordings into this program, and then you can drag the video to timeline for editing. After editing, you can choose “Output” in the main interface, and click “Plus” icon to add conversion task before selecting output format. Then switch to “Editor” > "Avid Studio” and click “Start” to begin exporting Media Portal recordings to DNxHD MOV for Avid Media Composer.

You are allowed to custom/optimize video and audio settings before start converting. The video and audio parameters displayed below are all adjustable, including codec, resolution, bit rate, frame rate, sample rate and audio channels.
For details, please read the article below as example:
Transcode MTS to DNxHD MOV for Avid Media Composer with Pavtube Media Magician for Mac
Pavtube Media Magician for Mac Online Help
The two articles will help you edit, and convert Media Portal recordings without any problems.
If you need to burn video to DVD disc/ISO/folder on Mac, you can try Pavtube DVD Creator for Mac, which is very easy to use, you can burn your videos to DVD in just few clicks.
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