x264 Video Codec rev. 1331

Description for x264 Video Codec

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x264 is a free library for encoding H264/AVC video streams. It is released under the terms of the GNU GPL.

Encoder features :

• CAVLC/CABAC
  
• Multi-references
  
• Intra: all macroblock types (16x16, 8x8, and 4x4 with all predictions)
  
• Inter P: all partitions (from 16x16 down to 4x4)
  
• Inter B: partitions from 16x16 down to 8x8 (including skip/direct)
  
• Ratecontrol: constant quantizer, single or multipass ABR, optional VBV
  
• Scene cut detection
  
• Adaptive B
• frame placement
  
• B-frames as references / arbitrary frame order
  
• 8x8 and 4x4 adaptive spatial transform
  
• Lossless mode
  
• Custom quantization matrices
  
• Parallel encoding of multiple slices

• Enabling Cabac: approximately 10% bitrate reduction without loss in quality, but is slow.
  
• Enabling Deblocking Filter: smooths out visible blocks during an encode (rather than by using post processing to smooth out blocks while decoding). Is a good idea to enable for low bitrate encodes.