X264 encoding parameter big test: 09 trellis (crf26)

I. Test content

 

Test Method --

X264 encoding parameter big test: Index stickers

Http://www.cnblogs.com/zyl910/archive/2011/12/14/x264_encode_param.html

 

Test parameter --

Trellis: 0, 1, 2. Execute trellis quantization to improve efficiency. 0. Disable; 1. Only enable the final code of one macro block; 2. Enable the code in all modes.

Refer to the test: trellis 0.

 

Default parameter --

-- Profile main -- preset medium -- tune SSIM -- CRF 26.0 -- threads 2 -- bframes 3 -- ref 3 -- merange 16 -- Me umh -- subme 9 -- trellis 0 -- SSIM

 

Test video --

A (red): 720p animation fate/Zero 07. "Fate" for short ".

B (yellow): 720p animated hunter x hunter 07. Hxh for short ".

C (green): p animation my sister could not be so cute 11. "Oreimo" for short ".

F (Qing): 720p movie "need for speed 12: No storm" trailer. NFS for short ".

G (blue): 720p movie Transformers 3 trailer. "Tran3" for short ".

H (purple): 1080p movie coralreef.1080p (coral reef ). "Coral" for short ".

 

 

Ii. Test Results

 

2.1 Image Quality

 

Dssim chart (higher (longer), better )--

 

Pssim chart (higher (longer), better )--

 

 

2.2 Bit Rate

 

Kbps chart (lower (shorter), better )--

 

Compression rate chart (lower (shorter), better )--

 

 

Transcoding speed: 2.3

 

FPS chart (higher (longer), better )--

 

Pssim chart (higher (longer), better )--

 

 

2.4 bit rate and Image Quality

 

Chart --

X coordinate: Bit Rate (Kbps ). The lower the value (left), the better.

Y coordinate: dssim ). Higher, better.

Color: different videos. For details, see the "test video" above ".

From bottom to top is trellis 0/1/2.

 

 

Speed and image quality of 2.5

 

Chart --

X coordinate: transcoding speed (FPS ). Higher (right), better.

Y coordinate: dssim ). Higher, better.

Color: different videos. For details, see the "test video" above ".

From right to left is trellis 0/1/2.

 

 

Speed and bit rate of 2.6

 

Chart --

X coordinate: transcoding speed (FPS ). Higher (right), better.

Y coordinate: Bit Rate (Kbps ). The lower the value, the better.

Color: different videos. For details, see the "test video" above ".

From right to left is trellis 0/1/2.

 

 

 

Iii. Summary

 

Compared with trellis0, trellis1 improves the image quality and has little impact on transcoding speed. The only drawback is that the bit rate increases slightly.

Compared with trellis1, trellis2 saves bit rate and has similar image quality. However, the transcoding speed is greatly affected.

 

If subme is 10 or higher, the trellis2 parameter must be added as required.

If the subme value is 9 or lower, trellis1 is recommended.