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Verify_Netflix_Per-Title_Encode_Optimization

Use ffmpeg and x265( HEVC) to verify the Per-Title_Encode_Optimization by Netflix. I just test the file in 4K at http://media.xiph.org/video/derf/ (I try the Netflix_Narrator)

Reference:

Netflix tech blog: http://techblog.netflix.com/2015/12/per-title-encode-optimization.html

Example Result

image

Verify Flow

  1. Reduce Frame
  2. Down Sampling
  3. HEVC encoding with diff QP
  4. Decode HEVC
  5. Up sampling
  6. Calculate PSNR
  7. Generate picture PSNR vs Bitrate by gnuplot

Sample picture

comparation.png in this repository

Usage

sudo bash script.sh [Vedio File Path] [Resolution 1] [Resolution 2] ...

Example:

sudo bash script.sh Netflix.y4m 3072x1620, 2048x1080, 1536x810, 1024x540

Default Configuration

  1. reduce frame to 128
  2. At begining, you should determine the interval of QP ( start with QP=0, which means the best quality and QP no more than 51)
  3. I jsut test the .y4m file with 4096x2160 and not try for others

Contact with me

If you have any questions, please don't mind reporting to me. yenwu.tw@gmail.com