Cheapest solution (free) AFAIK is Resolve Lite. The latest version even includes the MXF option. Downside is you cannot do burnins. I’m not sure it will do sound from the Alexa, my projects have all been double system and synced up in Avid.
Quick rundown:
In Preferences, add your source and destination drives, or Resolve won’t see them.
In CONFIG, Project Tab, choose 32 bit floating point, DaVince YRGB, 1920×1080 square pixel.
In CONFIG, Project tab, Timeline Conform options, choose the right timecode speed for the project, check “Embedded in the source clip”, check “Assist…”, check “Source clip file pathname” and use the pattern */%R.* . Apply
In CONFIG, LUTs tab, click “Load 3D Input Lookup Table” menu and select the Arri Alexa LogC to REC709 LUT. Apply.
In BROWSE, Media Storage, select your source drive/folder/clips, right click, and choose “Add Folders and Subfolders to Media Pool”.
In BROWSE, Timeline Management, click New (+), and click OK (you may rename, not required though).
In COLOR, select all clips (click first thumbnail, shift-click the last one), then choose Session->Render.
– Render properties, check Use Prefix, Suffix…from Source
– Output mode, select MXF, DNxHD, for offline you can use DNxHD 36 1080p
– Rendering mode: Source, you can optionally check to Render Clip with Unique Filename
– Data Level: Normally scaled legal video
– Choose a Destination Path.
– Wait till the render is done. On a 3-year-old XW8600, I got like 17fps of transcoding speed.
You will now have a folder with resulting MXF mediafiles.
On the Avid side, they need to drag these into a MediaFiles folder, in the right path (X:/Avid MediaFiles/MXF/n). They can number (number, not name) each folder (n); I use number 101 for shooting day #1, 102 for shooting day #2, etc. After adding them, launch Media Composer, wait for it to index the folder on launch. This will create media databases. They can then drag the ‘msm.db’ file from the folder with MXF files into a bin, and than bin will be populated with the clips.
Hope this helps.