• Compression Techniques

  Issues compressing Apple ProRes422 to MPEG-2 via Sorenson Squeeze 6

  Posted by Crawford Winstead on September 9, 2010 at 2:18 pm

  Hopefully somebody can help me with this…

  I am running Sorenson Squeeze 6 on a Mac to try and compress some Apple ProRes 422 videos into an MPEG-2 file. The file will be played in a DirectX application, running on a PC with Windows 7. When being played it looks to be heavily compressed, and I need help with some of the compression settings.

  Let me get more into detail…

  So I have received a Quicktime .mov that has been encoded with FCP using Apple ProRes 422 compression at 720×486 , 29.97 fps, 40.29 Mbit/s , and the file size is 515.7mb.

  So, this is the type of file I will have to compress into an MPEG-2, that will be playing on a…

  1.6 GHz Intel Atom 330 Dual Core
  NVIDIA GeForce 9400M Graphics
  1Gb DDR2 800 Ram
  32Gb SATA Solid State Drive
  Windows 7 Home

  Here is what I have done so far on my Mac using Sorenson Squeeze 6 :

  I have brought the original file in and created some presets.
  First off, I am encoding these MPEG-2 videos using an elementary stream type so I can mux the files using MPEG Streamclip…

  Here is a screenshot of the settings I am using in Sorenson :

  

  – I have changed many of the data rate settings as low as 3000 Kbps, and as high as 15,000 Kbps, and the end result looks essentially the same

  – The audio isn’t a problem, so I’m not going to address that.

  – I have used the crop/deinterlace filter and also not used the filter, and it makes a big difference, so obviously it needs to be deinterlaced.

  From there I will get the .m2v file and the .m2a file, and then mux those with MPEG Streamclip.

  So, I have done 8 different Pre-sets all with various settings playing primarily with the data rate, and the method from 2-pass vbr all the way to 1-pass cbr.

  So again, my end result that is playing back on the windows 7 box (the specs that are listed above) looks to be heavily compressed and pixelation occurs.

  Any help would be greatly appreciated!

  Thanks,
  Crawford and Luke

  Crawford Winstead replied 15 years, 11 months ago 1 Member · 0 Replies
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