Apple ProRes

• FourCCs used to indicate different ProRes flavours in the QuickTime container:
  • Apple ProRes 422 High Quality: 'apch' ('hcpa' in little-endian)
  • Apple ProRes 422 Standard Definition: 'apcn' ('ncpa' in little-endian)
  • Apple ProRes 422 LT: 'apcs' ('scpa' in little-endian)
  • Apple ProRes 422 Proxy: 'apco' ('ocpa' in little-endian)
  • Apple ProRes 4444: 'ap4h' ('h4pa' in little-endian)
• Company: Apple
• Whitepaper: http://images.apple.com/finalcutstudio/resources/white_papers/L342568A_ProRes_WP.pdf
• New Whitepaper introducing ProRes LT/Proxy/4444: http://images.apple.com/finalcutstudio/docs/Apple_ProRes_White_Paper_July_2009.pdf
• Samples: http://samples.mplayerhq.hu/V-codecs/HCPA/

ProRes Introduction

Apple ProRes is a family of video codecs used for storing and editing high definition video data in Apple's Final Cut Pro. Apple's official whitepaper lists the codec's key features as being:

• intra-only codec
• 4:2:2 / 4:4:4:4 source material
• 10-bit (12-bit for ProRes 4444) sample depth
• variable bitrate