Technical spec


  • Mac OSX : version >= 10.10
  • Microsoft Windows : version 7/8/10
  • Adobe CC 2015 / 2017 / 2018 (see Known Limitations for CC 2014)


  • ProRes : 6 official profiles (422 LT / Proxy / Normal / HQ / 4444 / XQ ) and two unofficial profiles (422 Ultra and 4444 Light). ProRes 4444 Light / 4444 / XQ supports the Alpha Channel.
  • x264 : best H264 / AVC implementation, outperforming both Adobe Media Encoder and QuickTime H264. A special easy-to-use Youtube Upload profile is provided.
  • x265 : files are 30% lighter than x264, better suited for 8K resolution.
  • x264 RGB : same as x264 but avoids YUV colorspace, best for storing separate channels in one video (UV map, Alphas…) for power users only.
  • HAP GPU accelerated codecs : Hap, Hap Alpha and Hap Q, you can choose if you want to compress frames and how many chunks you need (for faster multi threaded decompression).

Known Limitations

  • Don’t use the ProRes for broadcast. Always test your hardware and software. It is a reverse engineered version of ProRes not approved by Apple ; for example ProRes 4444’s Alpha channel doesn’t seem to be accepted by Blackmagic Hyperdeck Studio Mini.
  • For x264 Quality < 100 and x265, dimensions of the video must be even (odd resolutions will fail)
  • Alpha renders (ProRes 4444 and Hap) don’t store the Alpha mode, by default when reimported in AE the footage will be in “Straight” Mode
  • There’s a slight color shift when ProRes videos are played in Quicktime Player and VLC (but no color shift when the video is re-imported in AE)
  • There seem to be an issue with High DPI screens on OSX (4K / 5K), press SHIFT+ESC to put the window back in the top left corner

When rendering with After Effects :

  • ProRes 422 always have a soundtrack even if you don’t render sound (for AE OSX compatibility)
  • If the content is complex (with small repetitive patterns in background for example etc.), AfterCodecs’ ProRes has a hard time matching the official Apple bitrate : files can be 50% bigger but they will also be of higher quality. If that happens, you can try to step down the profile (e.g. choose Normal over HQ)
  • ProRes 422 has a color shift when reimporting on Premiere Pro / Media Encoder CC versions <= 2014